Machinist Calc Pro 2UG4088E-B

Machinist calc pro 2
The Machinist Calc Pro 2 Advanced Machining Math +

Materials calculator (Model 4088) provides hundreds of fast,
precise machining-specific solutions for turning, drilling, boring
and face, end and slot milling. Built-in tables for 20 materials, 6
processes and 3 tools will let you spend much less time looking
up your most-needed calculations on charts, in books or on the
Internet and more time machining.
The Machinist Calc Pro 2 gives you hundreds of calculations,
including:
Speeds and Feeds
Built-in Drill and Thread Size reference tables
Drill Point Cut Depth solutions
Bolt Pattern hole layouts with center x, y coordinates
Right triangle math
Trigonometric solutions
Wire Sizes and 3-Wire Measurements
Work in and convert between U.S. and Metric units, including:
Decimal Inches/Mils
Feet-Inch-Fractions
m, mm, cm
Area, Volume and Weight
Table of contents
GETTING STARTED..................................................................4
KEY DEFINITIONS...................................................................4
Basic Function Keys..............................................................5
Dimensional Function Keys...................................................5
Weight and Volume Function Keys........................................7
Trigonometric Function Keys.................................................7
Miscellaneous Function Keys................................................8
Machinist Function Keys........................................................8
MEMORY OPERATION..........................................................13
2 Machinist Calc Pro 2
USING THE MACHINIST CALC PRO 2..................................15

U.S./METRIC MODES............................................................15
MATERIALS, PROCESSES AND TOOLS..............................15
Materials..............................................................................15
Processes............................................................................16
Tools....................................................................................17
RPM (SPINDLE SPEED)........................................................17
RPM Basic........................................................................17
RPM Face Milling.............................................................18
RPM End Milling...............................................................19
FEED RATE IPM..................................................................20
Feed Rate Based on Cutting Feed and RPM
(for Turning).........................................................................21
Feed Rate Based on Cutting Feed and RPM
(for Drilling)..........................................................................21
Feed Rate Based on Feed per Tooth, RPM and
# of Teeth.............................................................................22
Feed Rate End Milling......................................................23
cutting speed - sfm........................................................25
Cutting Speed Turning......................................................25
Cutting Speed End Milling................................................26
Cutting Speed Drilling.......................................................27
FEED PER TOOTH/CHIP LOAD - IPT...................................28
Feed per Tooth Based on Cutting Feed and # of Teeth....28
Feed per Tooth Based on Feed Rate, RPM and
# of Teeth.............................................................................29
Feed per Tooth Face Milling.............................................29
cutting feed ipr...........................................................31
Cutting Feed Based on Feed per Tooth and # of Teeth....31
Cutting Feed Based on Feed Rate and RPM...................32
Cutting Feed Turning........................................................33
drill sizes..........................................................................34
Numeric Drill Size Entry.......................................................34
Letter Drill Size Entry...........................................................35
Inch Drill Size Entry.............................................................36
Millimeter Drill Size Entry.....................................................37
drill point..........................................................................37
Thread sizing....................................................................38
User's Guide 3
internal thread..............................................................39
external thread.............................................................40
Thread Classification...................................................40
Changing Thread Classes...................................................41
Changing a U.S. Thread Classification................................41
Changing a Metric Thread Classification.............................41
Numeric Thread Size...........................................................43
Fractional Thread Size........................................................45
Metric Thread Size...............................................................47
Custom Thread Percentage................................................49
WIRE SIZES AND 3-WIRE MEASUREMENTS......................50
Wire Size.............................................................................50
3-Wire Measurement Known Thread Size and
Wire Size.............................................................................51
Pitch Diameter Known 3-Wire Measurement
and Wire Size......................................................................52
BOLT PATTERN......................................................................54
Bolt Pattern..........................................................................54
Right Triangle Functions............................................56
Right Triangle Based on Adjacent and Opposite Legs.....56
Right Triangle Based on Hypotenuse and Angle..............57
circle calculations......................................................58
Circumference and Area Based on Diameter...................58
basic d:m:s and trigonometry examples...............58
Converting Degrees:Minutes:Seconds................................58
Time Calculations Using D:M:S...........................................59
Trigonometric Functions......................................................59
appendix...............................................................................61
getting STARTED
KEY DEFINITIONS
You may want to practice getting a feel for your calculator
keys by reading through the key definitions and learning how
to enter data, how to store values, etc., before proceeding to
the examples.
Basic Function Keys

O
On/Clear Key Turns on power. Pressing once

clears the last entry and the display. Pressing twice
clears all non-permanent values.
gO Off Turns all power off. Clears all nonpermanent values.

+-*
Arithmetic operation keys
,=
0-9
and .
Keys used for entering numbers.
Convert Used with the dimensional keys to

convert between units or with other keys to access
special functions.
gr
Store Used for storing values.
gr
1-9
Storage Registers M1 through M9 Used to

store values in memory registers 1 through 9.
Recall Used with other keys to recall stored

values and settings.
rr
Memory Clear Clears Accumulative Memory

and displays total.
Accumulative Memory Adds displayed value to

Accumulative Memory.
gM
M- Subtracts displayed value from

Accumulative Memory.
Dimensional Function Keys

m
Millimeters (mm) Identifies entry as

millimeters, with repeated presses toggling
between linear, area and volume units.
Also converts dimensional value to units of
millimeters, with repeated presses toggling
between millimeters and meters.
User's Guide 5
g5
Centimeters (cm) Identifies entry as

centimeters, with repeated presses toggling
between linear, area and volume units.
g9
Meters (m) Identifies entry as meters, with

repeated presses toggling between linear, area
and volume units.
g7
Feet Identifies entry as Feet, with repeated

presses of g7 toggling between linear,
area and volume units. Also used with i and
/ for entering Feet-Inch values. Repeated
presses of g7 during conversions toggle
between Feet-Inch-Fractions and decimal Feet.
Inch Identifies entry as Inches, with

repeated presses toggling between linear,
area and volume units. Entry can be whole
or decimal numbers. Also used with /
for entering fractional Inch values (e.g.,
9i1/2). Repeated presses during
conversions toggle between fractional and
decimal Inches.
Fraction Bar Used to enter fractions.

Fractions can be entered as proper (1/2, 1/8,
1/16) or improper (3/2, 9/8). If the denominator
(bottom) is not entered, the calculator's
fractional accuracy setting is automatically
used. Results are always shown in typical
dimensional fractional format.
1/1000" (mils) Multiplies a dimensionless

entry by 0.001 Inch and displays the result
as Inches. Converts a linear entry to decimal
Inches. For both methods, the result is rounded
and displayed to three decimal places.
Weight and Volume Function Keys

g6
Tons Enters or converts a weight or volume

value to tons.
g4
Pounds (lbs) Enters or converts a weight or

volume value to pounds.
g3
Metric tons (met tons) Enters or converts a

weight or volume value to metric tons.
g2
Grams Enters or converts a weight or

volume value to grams.
g1
Kilograms (kg) Enters or converts a weight

or volume value to kilograms.
g0
Weight per Volume (wt/vol) Stores a new

weight per volume as pounds per cubic foot or
other format as shown below. Default value is
490 pounds per cubic foot of steel.
Pounds per cubic foot
Pounds per cubic inch
Metric tons per cubic meter
Kilograms per cubic meter
Trigonometric Function Keys

ga
Sine Calculates the Sine of an entered

degree or unitless value.
gm
ArcSine Calculates the angle for the entered

or calculated Sine value.
go
Cosine Calculates the Cosine of an entered

degree or unitless value.
gi
ArcCosine (ArcCos) Calculates the angle

for the entered or calculated Cosine value.
gh
Tangent (Tan) Calculates the Tangent of an

entered degree or unitless value.
User's Guide 7
g/
ArcTangent (ArcTan) Calculates the angle

for the entered or calculated Tangent value.
Miscellaneous Functions
g.
Degrees:Minutes:Seconds (dmsdeg)
Converts between D:M:S and decimal degree
formats; repeated presses will toggle between
the two formats.
Percentage Used to find a given percent of a

number.
g%
x2 Squares the value on the display.
Backspace Function Used to delete entries

one keystroke at a time (unlike the O
function, which deletes the entire entry).
gA
Square Root (!) Calculates the Square

Root of the number on the display.
g,
Reciprocal (1/x) Finds the Reciprocal of a

number (e.g., 8g,= 0.125).
g*
Clear All Returns all stored values to the

default settings. Does not affect Preference
Settings.
g-
Change Sign (+/-) Toggle displayed value

between negative and positive value.
g+
g=
Pi Displays value of (3.1415927).
Preference Settings (Prefs) Accesses

various customizable settings, such as
dimensional answer formats
(see Preference Settings section).
Machinist Function Keys

Note: Unitless entries are assumed to be inches in U.S. mode,
millimeters in Metric mode.
Diameter Enters a Diameter. Calculates circle

Area and Circumference given entered Diameter.
gd
Bolt Pattern Enters the number of holes in a

Bolt Pattern. Calculates the hole Center-to-Center
Spacing and the x and y coordinates for each
hole in a Bolt Pattern given entered Diameter,
Number of Bolt Holes, Starting Angle (optional)
and Center x and y coordinates.
Material Scrolls through 20 Material types.

Materials are assigned numbers from 1-20,
which can be used to select a particular Material.
Materials are used to determine tabular Feed and
Speed values. See Materials section on page 16
for the complete list of available materials.
gN Depth of Cut (DOC) Enters a Cut Depth for

use in determining tabular Feed and Speed values,
as well as Material Removal Rate.
P
Process Scrolls through six Processes:

1. Face Milling (default) 4. Turning
2. End Milling
5. Boring
3. Slot Milling
6. Drilling
Used to determine tabular Feed and Speed
values. Assigned number can be used to select a
particular Process.
gP
Width of Cut (WOC) Enters a Cut Width for

use in determining tabular Feed and Speed values,
as well as Material Removal Rate and Radial
Chip Thinning Adjustment Factor.
Tool Scrolls through three Tool Types:

1. High Speed Steel (default)
2. Carbide
3. High Performance
Used to determine tabular Feed and Speed
values. Assigned number can be used to select a
particular Tool Type.
User's Guide 9
gL
Length of Cut (LOC) Enters a Cut Length to

calculate Cut Time.
Surface Feet per Minute Enters or calculates

Cutting Speed. Unitless entries are assumed to
be Feet in U.S. mode, meters in Metric mode.
Calculates Cutting Speed given entered Diameter
and RPM. Provides tabular Cutting Speed based
on Process, Material, Tooling, Depth of Cut, Width
of Cut and Diameter.
gS
Wire Size Enters or calculates Wire Size

for 3-Wire Measurements. Calculates the
recommended Ideal, Maximum and Minimum
Wire Sizes given an entered Thread Size.
Revolutions per Minute Enters or

calculates RPM (Spindle Speed). Calculates
RPM given entered Diameter and Cutting
Speed. Result is displayed as a whole number.
gR
3-Wire Measurement (3W Measure) Enters or

calculates a Three-Wire Measurement. Calculates
the minimum and maximum Three-Wire
Measurements and Pitch Diameters given entered
Thread Size and Wire Size, assuming an External
thread type. If a Three-Wire Measurement value
is entered, the Pitch Diameter calculation is based
on this entered measurement.
Inches per Tooth Enters or calculates

Chipload or Feed per Tooth (IPT), the chip size
of material cut by each tooth. Typically used in
Milling operations. Automatically adjusts for Radial
Chip Thinning, if applicable, when Process is set
to Face or End Milling. Provides tabular Feed per
Tooth based on Process, Material, Tooling, Depth
of Cut, Width of Cut and Diameter.
gT
Inches per Revolution (IPR) Enters or

calculates Cutting Feed or Feed per Revolution
(IPR). Provides tabular Feed per Revolution
based on Process, Material, Tooling and Depth
of Cut.
Inches per Minute Enters or calculates Feed

Rate or Feed per Minute (IPM). When applicable,
also provides Material Removal Rate and Cut
Time.
gI
Number of Teeth (#Teeth) Enters the Number

of Teeth on a tool. Default value is 1.
Drill Size Enters a numeric, letter, fractional or

metric Drill Size, displaying the decimal Inch (U.S.
mode) or millimeter (Metric mode) equivalent of the
Drill Size. The nearest Drill Size is displayed if the
entered value doesn't match a Drill Size. Repeated
presses of D or + scroll through Drill Sizes in
increasing order. Presses of - scroll through Drill
Sizes in decreasing order. Selected Drill Size is
stored upon exiting function.
gD
Drill Point Enters the Cutting Angle of a

Drill Point. Calculates the Drill Point Cut Depth
that needs to be taken into account when it's
necessary to maintain a specific full diameter
depth.
gn
% of Thread Enters a non-standard Thread

Grip Percentage for use in determining screw Tap
Drill Sizes. Default value is 75%.
Thread Size Enters a numeric, fractional

or metric Thread Size and provides Thread
characteristics such as Cut Tap Drill Size,
Minimum Major Diameter, etc. See Thread
Sizing section for further details on entry format,
valid entries and a listing of the resulting Thread
characteristics.
User's Guide 11
gt
Thread Classification (Thread Class) Used

to select the Thread Class for numeric and
fractional Threads and the Tolerance Class for
metric Threads. The default Class for numeric and
fractional Thread Sizes is 2B (Internal) and the
default Tolerance Class for metric Thread Sizes
is 6H (Internal). See Thread Sizing section for
further details on available Classes.
g8
Alpha Enters alphabet character selection

mode. While in this mode, a letter can be selected
and used with D to enter a letter Drill Size.
Entering this mode with a unitless entry between
1 and 26 will display the corresponding letter of
the alphabet (i.e., 5g8 displays the letter
E). While in Alpha mode, presses of 8 or +
scroll forward through the alphabet, while presses
of - scroll backward.
Adjacent (x) Enters or calculates the Adjacent

(horizontal) leg of a right triangle. Calculates
Adjacent value given two other right-triangle
values. Also enters the Center x-coordinate of a
Bolt Pattern.
Opposite (y) Enters or calculates the

Opposite (vertical) leg or height of a right triangle.
Calculates Opposite value given two other
right-triangle values. Also enters the Center
y-coordinate of a Bolt Pattern.
Hypotenuse (r) Enters or calculates the

Hypotenuse (diagonal) of a right triangle.
Calculates Hypotenuse value given two other
right-triangle values.
Angle () Enters or calculates an Angle,

providing the Adjacent Angle for both instances.
Calculates an Angle given two other right-triangle
values. Also enters Lead Angle adjustment for
Face Milling, as well as Starting Angle of the
first hole of a Bolt Pattern, with 0 being the
three oclock position and the rotation going
counterclockwise.
memory operation
Whenever the M key is pressed, the displayed value will be
added to the Memory. Other Memory functions:
FUNCTION
KEYSTROKE
Add to Memory
Subtract from Memory
gM
Recall total in Memory
rM
Display/Clear Memory
rr
Memory is semi-permanent, clearing only when you do one of

the following:
turn off the calculator
press rr
press g* (Clear All).
When Memory is recalled (rM), consecutive presses of
M will display the calculated Average and total Count of the
accumulated values.
Using M+
355M
M+
&
355.
(cont'd)
User's Guide 13
(cont'd)
255M
745gM (M-)
M+
&
255.
M745.
&
TOTAL VALUE
rM M+
&
- 135.
AVERAGE VALUE
M M+
&
TOTAL ENTRIES
M M+
&
rr
M+
- 45.
3.
- 135.
Using Memory Storage Keys (M1- M9)

In addition to the standard cumulative Memory (as previously
described), your calculator has nine independent Storage
Registers M1 through M9 that can be used to permanently
store single, noncumulative values. The following example
shows the use of M1 (gr1). To use M2 - M9, replace
the presses of the 1 key with presses of the corresponding
number key (2-9).
You can replace a value in one of these Memory registers by
storing a new value in place of the stored value.
FUNCTION
KEYSTROKE
Store single value in M1
gr1
Clear M1
Recall M1
0gr1
r1
Store 175 into M1, recall the value, and then clear the value:
175gr1
MEMORY
M-1
175.
0.
gOO
r1
MEMORY
M-1
175.
0gr1
MEMORY
M-1
0.
Using the machinist calc pro 2

U.S. AND METRIC MODE SETTINGS
The Machinist Calc Pro 2 allows you to set the calculator to
use either U.S. Mode or Metric Mode. The default setting is
U.S. units. You can change to Metric Mode by changing your
Preference setting (see page 65). The examples in this User's
Guide are done in U.S. Mode.
materials, processes and tools

Materials
The Machinist Calc Pro 2 has 20 built-in Material types that
can be used to determine tabular Feed and Speed values.
You can scroll through the available Materials by repeatedly
pressing the N key, or by pressing the + key or key to scroll forward and backward through the Materials.
You can also enter the assigned number (see listing on next
page), then press the N key to select the Material, which
will be set until you select another Material or perform a Clear
All (g*).
0. No Material (Default)
1. 1020 Low-Carbon Steel
2. 1045 Medium-Carbon Steel
3. 1060 High-Carbon Steel
(cont'd)
User's Guide 15
(cont'd)
4. 4140 Chromium-Molybdenum Alloy Steel
5. 4340 Nickel-Chromium-Molybdenum Alloy Steel
6. 52100 Chromium Alloy Steel
7. 304 Austenitic Stainless Steel
8. 316 Austenitic Stainless Steel
9. 410 Martensitic Stainless Steel
10. 430 Ferritic Stainless Steel
11. P20 Mold Type Tool Steel
12. H13 Hot Work Tool Steel
13. 2024-T3 Wrought Aluminum Alloy
14. 6061-T6 Wrought Aluminum Alloy
15. A390.0-T5 Cast Aluminum Alloy
16. Ti-6Al-4V Alpha-Beta Titanium Alloy
17. Ti-10V-2Fe-3Al Beta Titanium Alloy
18. Alloy 718 Nickel-Based Heat Resistant Alloy
19. Alloy X Nickel-Based Heat Resistant Alloy
20. Haynes Alloy 188 Colbalt-Based Heat Resistant Alloy
Note: There is a Workpiece Materials Conversion Table in Appendix A.
Processes
The Machinist Calc Pro 2 has six built-in Processes that can be
used to determine tabular Feed and Speed values.
You can scroll through the available Processes by repeatedly
pressing the P key, or by pressing the + key or - key to
scroll forward and backward through the Processes.
You can also enter the assigned number (see following page),
then press the P key to select the Process, which will be set
until you select another Process or perform a Clear All (g*).
1. Face Milling (Default)
4. Turning
2. End Milling
5. Boring
3. Slot Milling
6. Drilling
Tools
The Machinist Calc Pro 2 has three built-in Tool Types that can
be used to determine tabular Feed and Speed values.
You can scroll through the available Tool Types by repeatedly
pressing the L key, or by pressing the + key or - key to
scroll forward and backward through the Tools.
You can also enter the assigned number (see listing below),
then press the L key to select the Tool Types, which will
be set until you select another Tool or perform a Clear All
(g*).
1. High Speed Steel (Default)
2. Carbide
3. High Performance
rpm (spindle speed)

RPM is the rotational speed of the spindle in revolutions per
minute. In a milling machine or drill, the Spindle Speed is the
rotation of the attached cutting tool. In a turning machine, it is
the rotation of the attached workpiece. RPM can be calculated
given values for Diameter and Cutting Speed.
RPM - Basic
Calculate the RPM when milling with a 0.375" bit at a Cutting
Speed of 300 sfm (surface feet per minute):
OO
0.
1. Enter the bit Diameter:

(cont'd)
User's Guide 17
(cont'd)
.375d DIAMETER
0.375 INCH
2. Enter the Cut Speed:

300S
CUT SPEED
/MIN
300. FEET
3. Calculate the Spindle Speed (RPM):

R
RPM
3056.
RPM Face Milling

Find the Spindle Speed when milling 1060 Hi-Carbon Steel (3)
with a 0.5" High Performance bit (3) at a Depth of Cut of 0.25":
1. Clear the calculator:
0.
OO
2. Set Process to Face Milling:
1P
FACE MILLING
1.
3. Set Tooling to High Performance:

3L
high performance
TOOL
3.
4. Set Material to 1060 Hi-Carbon Steel:

3N
1060-HI C. STEEL
MATL
3.
5. Enter Depth of Cut:

.25gN (DOC)
6. Enter Tool Diameter:
DEPTH OF CUT
0.25 INCH
.5d
DIAMETER
0.5 INCH
7. Calculate RPM:
R
rpm
4584.
8. Show tabular Cut Speed:

R
cut speed
/MIN
600. FEET
9. Now, change the Depth of Cut to 0.1" and find new RPM
and tabular Cut Speed:
.1gN (DOC)
R
R
DEPTH OF CUT
rpm
0.1 INCH
6875.
cut speed
/MIN
900. feet
RPM End Milling

Find the Spindle Speed when milling 316 Stainless Steel with
a 1" 4-fluted Uncoated Carbide bit at a 0.5" radial Width of Cut.
Then, change the Depth of Cut to 0.25" and recalculate:
1. Clear the calculator:
0.
OO
2. Set Process to End Milling:
2P
END MILLING
2.
3. Set Tooling to Carbide:

2L
CARBIDE TOOL
2.
User's Guide 19
4. Set Material to 316 Stainless Steel (selection #8):

8N
316-aus. s. STEEL
MATL
8.
5. Enter Width of Cut:

.5gP (WOC)
widTH OF CUT
0.5 INCH
6. Enter Tool Diameter:

1d
DIAMETER
1. INCH
7. Calculate RPM:
R rpm
802.
8. Show tabular Cut Speed:

R
cut speed
/MIN
210. FEET
9. Now, change Width of Cut to 0.25" and find new RPM and
tabular Cut Speed:
.25gP (WOC)
R
R
WIDTH OF CUT
RPM
cut speed
/MIN
0.25 INCH
859.
225. FEET
feed rate - ipm

Feed Rate (IPM) is the speed of the cutting tool's movement
relative to the workpiece as the tool makes a cut. You can
calculate Feed Rate given values for RPM and either Feed per
Tooth (IPT) and number of teeth for Milling operations, or Feed
per Revolution (IPR) for all other machine operations.
Feed Rate Based on Cutting Feed and RPM (for Turning)

Calculate the Feed Rate if you are turning a 1" steel round
stock down using a Cutting Feed of 0.031 Inches per
Revolution and a rotational speed of 900 RPM:
0.
OO
1. Enter the Feed per Revolution:
.031gT (IPR)
feed/REV.
0.031 inch
2. Enter the RPM:

900R
RPM
900.
3. Calculate the Feed Rate:

I
Feed/minute
27.900 inch
Feed Rate Based on Cutting Feed and RPM (for Drilling)

Calculate the Feed Rate for a Drilling operation that is using a
recommended Cutting Feed of 0.004 Inches per Revolution at
800 RPM:
0.
OO
1. Enter the Cutting Feed:
4BgT (IPR)
feed/REV.
0.004 inch
2. Enter the RPM:

800R
rpm
800.

(cont'd)
User's Guide 21
(cont'd)
I
feed/minute
3.200 inch
Feed Rate Based on Feed per Tooth, RPM and # of Teeth

Calculate the Feed Rate for a four-fluted end mill using a Feed
per Tooth (Chip Load) of 0.005" turning at 1,000 RPM:
RPM: 1000
Feed per Tooth:
0.005
Number
of Teeth: 4
Feed
Rate
g* ALL CLEARED
0.
1. Enter the Feed per Tooth:

5BT
feed/tooth
0.005 inch
2. Enter the Number of Teeth:

4gI (#Teeth)
number of teeth
4.
3. Enter the RPM:

1000R
rpm
1000.

I
feed/minute
20.000 inch
Feed Rate End Milling

For End Milling (2), find the Feed Rate (IPM) using 1020
Low-Carbon Steel (1) and a 4-Tooth High Speed Steel Tool
(1) with a Diameter of 0.5", a 0.25" Width of Cut and a 20"
Length of Cut. Then, change the Width of Cut to 0.15" to
show the Adjusted Feed per Tooth and the RCT Adjustment
Factor. Then, add a 0.125" Depth of Cut and find the Material
Removal Rate, Spindle Power and Spindle Torque:
g* ALL CLEARED
0.
1. Select the Process:

2P
end milling
2.
2. Select the Tool:

1L
high speed steel

TOOL
1.
1020-LO c. steel
MATL
1.
3. Select the Material:

1N
4. Enter the # of Teeth:
4gI (#Teeth)
number of teeth
4.
5. Enter the Width of Cut:

.25gP (WOC)
width of cut
0.25 inch
6. Enter the Length of Cut:

20gL (LOC)
length of cut
20. inch
(cont'd)
User's Guide 23
(cont'd)
7. Enter the Diameter:
.5d
diameter
0.5 inch

I
feed/minute
3.667 inch
9. Calculate the Cut Time:

I
cut time
MIN
5.454
10. Calculate the RPM:

I
rpm
917.
11. Change the Width of Cut (Radial Chip Thinning

Adjustment):
.15gP (WOC)
WIDTH OF CUT
0.15 INCH
12. Recalculate Feed Rate, Cut Time and RPM:

I
I
I
FEED/MINUTE
cut time
MIN
rpm
9.336 INCH
2.142
1070.
13. Show Adjusted Feed per Tooth and RCT Adjustment

Factor:
feed/tooth
I ADJ.
0.002 inch
rct. adj. factor
1.091
14. Now, add a 0.125" Depth of Cut and find the Material
Removal Rate, Spindle Power and Spindle Torque:
depth of cut
0.125 inch
.125gN (DOC)
FEED/MINUTE
9.336 INCH
MATERIAL REMOVAL
/MIN
0.175 CU INCH
SPINDLE POWER
HP
0.123
SPINDLE TORQUE
LBFT
0.602
cutting speed - sfm

Cutting Speed (SFM) is the speed of the workpiece surface
relative to the edge of the cutting tool during a cut, typically
measured in Surface Feet per Minute. You can calculate
Cutting Speed by entering the Diameter of the tool or material
you're using and the RPM (Spindle Speed).
Cutting Speed Turning
Calculate the Cutting Speed when turning a 4" rod running at
300 RPM:
0.
OO
1. Enter the Diameter of the rod:
4d
dIAMETER
4. inch
2. Enter the RPM:

(cont'd)
User's Guide 25
(cont'd)
300R
RPM
300.
3. Calculate the Cutting Speed:

S
cut speed
/MIN
314. FEET
Cutting Speed End Milling

Find the Cutting Speed when End Milling (2) using 1060-High
Carbon Steel (3) using a High Performance 0.5" bit (3) and
0.1" radial Width of Cut:
0.
OO
2P
end milling
2.
2. Select the Tooling:

3L
HIGH PERFORMANCE
TOOL
3.
1060-hi C. steel
MATL
3.

3N
4. Enter the Width of Cut:
.1gP (WOC)
WIDTH OF CUT
0.1 INCH

.5d
6. Find the Cutting Speed:
DIAMETER
0.5 INCH
CUT SPEED
/MIN
370.
7. Calculate the RPM:

S
RPM
2827.
Cutting Speed Drilling

Find the Cutting Speed for Drilling (6) 1020-Low Carbon
Steel (1) with a 0.5" HSS (1) drill:
g* ALL CLEARED
0.

6P
DRILLING
6.
2. Select the Tooling:

1L
HIGH speed steel

TOOL
1.
1020-Lo C. steel
MATL
1.

1N
4. Enter the Drill Size:
.5D
1/2" DRILL
SIZE
0.500 INCH
5. Find the Cutting Speed:

S
CUT SPEED
/MIN
85. FEET
6. Calculate the Spindle Speed:

S
RPM
649.
(cont'd)
User's Guide 27
(cont'd)
7. Change the Material to 1060-High Carbon Steel and
recalculate:
3N
S
S
1060-hi C. Steel
MATL
CUT SPEED
/MIN
3.
65. FEET
RPM
497.
feed per tooth/chip load - IPT

Feed per Tooth (IPT), or Chip Load, is the distance that the
workpiece feeds into each tooth on a multi-point cutting tool
as it rotates. You can calculate Feed per Tooth given values
for Number of Teeth and Cutting Feed (IPR). If the Cutting
Feed is not known, the Feed per Tooth can be calculated
given values for Number of Teeth, Feed Rate (IPM) and
RPM (Spindle Speed).
Feed per Tooth Based on Cutting Feed and # of Teeth
Calculate Feed per Tooth (IPT) with a Cutting Feed (IPR) of
0.024" for 4 Teeth:
g* ALL CLEARED
0.
1. Enter the Cutting Feed:

.024gT (IPR)
feed/rev.
0.024 inch

4gI (#Teeth)
number of teeth
4.
3. Calculate the Feed per Tooth:

T
FEED/TOOTH
0.006 INCH
Feed per Tooth Based on Feed Rate, RPM and # of Teeth

Calculate Feed per Tooth (IPT) with a Feed Rate (IPM) of
12.8" per Minute, 4 Teeth and a Spindle Speed of 775 RPM:
0.
OO
1. Enter the Feed Rate:
12.8I
feed/Minute
12.8 inch

4gI (#Teeth)
number of teeth
4.
3. Enter the RPM:

775R
rpm
775.
4. Calculate the Feed per Tooth:

T
feed/tooth
0.004 inch
Feed per Tooth Face Milling

Find the Feed per Tooth (IPT) for Face Milling (2) using
4140-Alloy Steel for Material (4) and a 2-fluted High Speed
Steel Tool (1) with a Diameter of 1" and a 0.1" Depth of Cut.
Then, add a 0.15" Width of Cut and 45 Lead Angle:
g* ALL CLEARED
0.

1P
face milling
1.
2. Select the Tool:

(cont'd)
User's Guide 29
(cont'd)
high speed steel
1L TOOL
1.
4140-alloy steel
MATL
4.

4N
2gI (#Teeth)
number of teeth
2.
5. Enter the Depth of Cut:

.1gN (DOC)
1d
Depth of cut
0.1 inch
diameter
1. inch
7. Find the Feed per Tooth and other values:

T
feed/tooth
0.012 inch
feed/minute
number of teeth
rpm
12.376 INCH
2.
516.
8. Now, add a Width of Cut to 0.15" and a 45 Lead Angle and

recalculate:
width of cut
.15gP (WOC)
0.15 inch
45 n
angle
()
45.
feed/tooth
T ADJ.
0.024 inch
T
T
T
T
T
FEED/MINUTE
24.508 INCH
NUMBER OF TEETH
2.
RPM
516.
rct. adj. factor
1.400
lead angle adj.
1.414
cutting feed ipr

Cutting Feed is the distance the cutting tool or workpiece
advances during one revolution of the spindle, typically
measured in Inches per Revolution (IPR). You can calculate
Cutting Feed given values for the Feed per Tooth or Chip Load
(IPT) and Number of Teeth. If these values are unknown, you
can calculate Cutting Feed with Feed Rate (IPM) and RPM
(Spindle Speed).
Cutting Feed Based on Feed per Tooth and # of Teeth
Calculate the Cutting Feed (IPR) with a Feed per Tooth (IPT)
of 0.005" and 4 Teeth:
g* ALL CLEARED
0.
1. Enter the Feed per Tooth:

(cont'd)
User's Guide 31
(cont'd)
.005T
FEED/TOOTH
0.005 inch

4gI (#Teeth)
Number of Teeth
4.
3. Calculate the Cutting Feed:

gT (IPR)
feed/rev.
0.020 inch
Cutting Feed Based on Feed Rate and RPM

Calculate the Cutting Feed (IPR) using a 15" Feed Rate (IPM)
and a Spindle Speed of 800 RPM:
0.
OO
1. Enter the Feed Rate:
15I
FEED/minute
15. inch
2. Enter the Spindle Speed:

800R
RPM
800.
3. Calculate the Cutting Feed:

gT (IPR)
feed/rev.
0.019 inch
Cutting Feed Turning

Find the Cutting Feed (IPR) when Turning (4) 1", 1020
Low-Carbon Steel (1) at a 0.1" Depth of Cut using a High
Speed Steel (1) bit:
g*
ALL CLEARED
4P
TURNING
0.

4.

1N
1020-lo c. steel
MATL
1.
high speed steel

TOOL
1.
3. Select the Tool:

1L
4. Enter the Depth of Cut:
.1gN (DOC)
depth of cut
0.1 inch
5. Enter Diameter:
1d
DIAMETER
1. INCH
6. Find the Cutting Feed:

gT (IPR)
FEED/REV.
0.015 INCH
User's Guide 33
drill sizes
The D key allows the selection of a desired Drill Size,
which can be entered as a:
Numeric value (whole digits 1 through 97)
Letter between A and Z
Fractional or decimal Inch value (max. of 3-1/2")
Millimeter value (max. of 78 mm).
The selected Drill Size is displayed along with its decimal Inch
equivalent. If the entered value doesn't match a Drill Size,
the nearest Drill Size is displayed. You can scroll through the
available sizes in increasing order with either the D key
or the + key. The - key displays the available sizes in
decreasing order. To set the displayed Drill Size, press O
(or any other key).
Numeric Drill Size Entry
Enter a #36 Drill and scroll through the next larger available sizes:
0.
OO
36D
#36 drill
size
0.107 inch
2. Display the next larger available sizes:

D
2.75mm DRILL
size
0.108 inch
7/64" DRILL
size
0.109 inch
#35 DRILL
size
0.110 inch
D*
* Repeated presses of D display the next larger Drill Sizes. The

+ and - keys will scroll forward and backward, respectively,
through all available Drill Sizes.
Letter Drill Size Entry

You can enter letter Drill Sizes by selecting an alphabet
character via Alpha Mode (g8) and then storing it using
the D key. The desired letter can be selected by scrolling
through Alpha Mode until the letter is reached or by specifying
the numerical order of the letter within the alphabet prior to
entering Alpha Mode. Both methods are shown below.
Select Drill Size E by scrolling through Alpha Mode. Then,
select Drill Size G by entering the numerical order of the letter
(the letter G is 7th in the alphabet):
0.
OO
1. Enter Alpha Mode:
g8 (Alpha)
ALPHA CHARACTER
A
1.
2. Scroll until the letter E is displayed:

8888
ALPHA CHARACTER
e
5.
3. Enter as Drill Size:

D
"e" DRILL
SIZE
0.250 INCH
4. View next larger available sizes:

D
6.40mm DRILL
SIZE
0.252 INCH
6.50mm DRILL
SIZE
0.256 INCH
"F" DRILL
SIZE
0.257 INCH
(cont'd)
User's Guide 35
(cont'd)
5. Enter order of letter G and enter Alpha Mode:
7g8 (Alpha)
6. Enter as Drill Size:
D*
ALPHA CHARACTER
G
"g" DRILL
SIZE
7.
0.261 INCH
* Repeated presses of D display the next larger Drill Sizes. The

+ and - keys will scroll forward and backward, respectively,
through all available Drill Sizes.
Inch Drill Size Entry

Enter hole sizes of 0.3", 1" and 1-19/64". After entering each
size, scroll through the available sizes to view the next larger
and next smaller sizes:
0.
OO
1. Enter the 0.3" hole size and view next larger and next
smaller sizes:
.3iD
D
--
7.60mm DRILL
SIZE
0.299 INCH
"N" DRILL
SIZE
0.302 INCH
19/64" DRILL
SIZE
0.297 INCH
2. Enter the 1" hole size and view next larger and next smaller
sizes:
1iD
1" DRILL
SIZE
1.000 INCH
25.50mm DRILL
SIZE
1.004 INCH
--
63/64" DRILL
SIZE
0.984 INCH
3. Enter the 1-19/64" hole size and view next larger and next
smaller sizes:
1-19/64" DRILL
1i19/64D
SIZE
1.297 INCH
D
33.00mm DRILL
SIZE
1.299 INCH
--
1-9/32" DRILL
SIZE
1.281 INCH
Millimeter Drill Size Entry

Enter a 5.7 mm hole size and scroll through the available sizes
to view the next larger and next smaller sizes:
0.
OO
1. Enter the hole size as millimeters:
5.7mD
5.70mm DRILL
SIZE
0.224 INCH
2. View next larger and next smaller sizes:

D
--
5.75mm DRILL
SIZE
0.226 INCH
#2 DRILL
SIZE
0.221 INCH
drill point
The Drill Point function calculates the Drill Point Cut Depth
(length) of the stored Drill Size. By default, the calculation
is based on a Cutting Angle of 118. If a different Angle is
desired, it can be stored using the Drill Point function (for
example, 120gD stores 120).
Find the Drill Point Cut Depth for a 1/2-Inch drill with a 118
Cutting Angle. Then, find the Cut Depth using a 127 Angle:
(cont'd)
User's Guide 37
(cont'd)
0.
OO
1/2D
1/2" DRILL
SIZE
0.500 INCH
2. Enter 118 Angle and calculate the Drill Point Cut Depth:
118gD (Drill Point)
DRILL POINT CUT

DPTH
0.150 INCH
DRILL CUT ANGLE

118.000
1/2" DRILL
SIZE
0.500 INCH
3. Enter 127 Angle and calculate the Drill Point Cut Depth:
127gD
DRILL POINT CUT

DPTH
0.125 INCH
THREAD SIZING
The t key allows you to enter a numeric, fractional
or metric Thread Size and then scroll through the various
available Thread characteristics, as shown in the tables
provided later in this section.
When using the t key, the first entry is considered the
Thread Size. Upon entering the Thread Size, the Threads per
Inch (TPI) or Pitch is required. If the entered Thread Size is a
standard size, continuous presses of the t key will toggle
through the available common TPI or Pitches.
Once the desired TPI/Pitch is reached, pressing O stores
the Thread Size. If the Thread Size you enter is not a standard
size or if you have a non-common TPI/Pitch, you will need to
directly enter the TPI/Pitch value, pressing t after entering
it in order to store the Thread Size.
The following specifies the entry ranges that the calculator

allows for the Thread Size and TPI/Pitch values for numeric,
fractional and metric Thread Sizes:
Numeric
Thread Size
TPI/Pitch
0, 1, 2, 3, 4, 5, 6, 8,
10, 12, 14
less than 100
Fractional 0.06" to 6"
less than 100
Metric
less than or equal to 10
1.6 mm to 300 mm
Note: Entries outside of the ranges mentioned above will result in an

Entry Error.
The following tables list the available Thread characteristics

provided by the Thread Size function. Note that there are two
separate listings, one for Internal Threads and one for External
Threads. The listing shown within the Thread Size function
is determined by the set Thread Classification (see Thread
Classification section).
Internal Thread
Thread Size
Minimum Pitch Diameter
Thread Pitch*
Maximum Pitch Diameter
Cut Tap Drill Size**
Minimum Minor Diameter
Roll Tap Drill Size**
Maximum Minor Diameter
Close Fit Drill Size**
Minimum Major Diameter
Free Fit Drill Size**

* Thread Pitch is only displayed for Numeric and U.S. Thread Sizes.
** If the resulting hole size is greater than 2 Inches or 50 mm, the
actual hole size will be displayed instead of adjusting to the closest
Drill Size.
User's Guide 39
External Thread
Thread Size
Minimum Pitch Diameter
Thread Pitch*
Maximum Major Diameter
Cut Rod Size
Minimum Major Diameter
Roll Shank Size
Maximum Minor Diameter
Maximum Pitch Diameter

* Thread Pitch is only displayed for Numeric and U.S. Thread Sizes.
Thread Classification
With the Machinist Calc Pro 2 you can choose between
Internal and External Threads. Entering a U.S. Thread Size
will allow you to choose among U.S. Thread Classes as
shown below.
Thread Type
U.S. Thread Classes
Internal
1B
2B*
3B
External
1A
2A
3A
Entering a Metric Thread will allow you to choose among

Metric Thread Tolerance Classes as shown below.
Thread Type Metric Thread Tolerance Classes
Internal
External
3G
3H
4G
4H
5G
5H
6G
6H*
7G
7H
8G
8H
9G
9H
3g
3h
3e
3f
4g
4h
4e
4f
5g
5h
5e
5f
6g
6h
6e
6f
7g
7h
7e
7f
8g
8h
8e
8f
9g
9h
9e
9f
* Default settings
Changing Thread Classes

To display the current Thread Classification, press gt.
Repeated presses of t will toggle between External
and Internal Thread Types. You can change the number of
a Thread Class by entering the number of the desired class/
grade and pressing gt.
Changing a U.S. Thread Classification
g* ALL CLEARED
0.
1. Recall the current Thread Classification:

gt (Thread Class)
U.S. INT. THREAD

2b
2.
2. Change to U.S. External Thread Class 2:

t
U.S. EXT. THREAD

2a
2.
3. Change to U.S. External Thread Class 1:

1gt (Thread Class)
U.S. EXT. THREAD

1a
1.
4. Change to U.S. Internal Thread Class 1:

U.S. INT. THREAD
t 1B
1.
Changing a Metric Thread Classification

Changing a Metric Thread Tolerance Class is done in the
same manner, with several selections available for Internal
and External Threads.
g* ALL CLEARED
0.
1. Enter a Tolerance Grade of 4:

(cont'd)
User's Guide 41
(cont'd)
4gt (Thread Class) MM INT. THREAD
4H
4.
2. Scroll through the available Tolerance Positions for the

entered Grade:
t
MM EXT. THREAD
4g
4.
MM EXT. THREAD
4h
4.
MM EXT. THREAD
4e
4.
MM EXT. THREAD
4f
4.
MM INT. THREAD
4G
4.
MM INT. THREAD
4H
4.
3. Enter a Tolerance Grade of 6 and scroll through the

available Tolerance Positions for the entered Grade:
MM INT. THREAD
6H
6.
MM EXT. THREAD
6g
6.
MM EXT. THREAD
6h
6.
t*
MM EXT. THREAD
6e
6.
6gt (Thread Class)
* Repeated presses of t will continue to scroll through the

available Tolerance Positions of the specified Grade.
Note: The number 3 can be entered to select both U.S. and Metric
classes. To select either, go to Preferences and set the calculator to
either U.S. Mode or Metric Mode.
Numeric Thread Size

Enter an 8-32 screw and scroll through the available Internal
Thread (Class 2B) characteristics, then switch to External
Thread (Class 2A) and scroll through the available Thread
characteristics:
Note: The default U.S. Thread Class is 2B (Internal). To view the
current Thread Class, press gt. To change the class, press
t again.
Thread Size calculations for Pitch, Major, and Minor Diameter
attributes are compliant with ANSI/ASME B.1.1-2003 and ANSI/
ASME B.1.13M-2005.
g* ALL CLEARED
0.
1. Verify Thread Class is set to 2B:

gt (Thread Class)
U.S. INT. THREAD

2B
2.
2. Enter the Thread Size:

8t
THREAD SIZE
2B
8-
32t
THREAD SIZE
2B
8 - 32
3. Enter the TPI:
4. Find the available Internal Thread characteristics:

t
THREAD PITCH
0.031 INCH
TAP DRILL SIZE

#29
0.136 INCH
ROLL TAP DRILL
3.750 MM
(cont'd)
User's Guide 43
(cont'd)
t
CLOSE FIT DRILL

#18
0.170 INCH
FREE FIT DRILL

#16
0.177 INCH
PITCH DIAMETER
MIN
0.144 INCH
PITCH DIAMETER
MAX
0.147 INCH
MINOR DIAMETER
MIN
0.130 INCH
MINOR DIAMETER
MAX
0.139 INCH
MAJOR DIAMETER
MIN
0.164 INCH
5. Switch to Thread Class 2A:

gtt (Thread Class)
U.S. EXT. THREAD

2A
2.
6. Clear the display and find the available External Thread

characteristics:
0.
O
t
THREAD SIZE
2A
THREAD PITCH
0.031 INCH
ROD SIZE
8 - 32
0.164 INCH
COLD FORM SIZE

0.141 INCH
PITCH DIAMETER
MAX
0.143 INCH
PITCH DIAMETER
MIN
0.140 INCH
MAJOR DIAMETER
MAX
0.163 INCH
MAJOR DIAMETER
MIN
0.157 INCH
MINOR DIAMETER
MAX
0.126 INCH
Fractional Thread Size

Find the available Internal and External Thread characteristics
for a 1/4 Inch, 28 TPI screw:
g* ALL CLEARED
0.
1. Verify Thread Class is set to 2B:

gt (Thread Class)
U.S. INT. THREAD

2B
2.

1/4t
THREAD SIZE
2B
0.25 - INCH
3. Enter the TPI and store the final Thread Size:

28t
THREAD SIZE
2B
0.25 - 28 INCH

t
t
t
THREAD PITCH
0.036 INCH
TAP DRILL SIZE

#3
0.213 INCH
ROLL TAP DRILL
5.900 MM
(cont'd)
User's Guide 45
(cont'd)
t
CLOSE FIT DRILL

F
0.257 INCH
FREE FIT DRILL

H
0.266 INCH
PITCH DIAMETER
MIN
0.227 INCH
PITCH DIAMETER
MAX
0.231 INCH
MINOR DIAMETER
MIN
0.211 INCH
MINOR DIAMETER
MAX
0.220 INCH
MAJOR DIAMETER
MIN
0.250 INCH
5. Switch to Thread Class 2A:

gtt (Thread Class)
U.S. EXT. THREAD

2A
2.

characteristics:
O
0.
THREAD SIZE
2A
0.25 - 28 INCH
THREAD PITCH
ROD SIZE
0.036 INCH
0.250 INCH
COLD FORM SIZE

0.224 INCH
PITCH DIAMETER
MAX
0.226 INCH
PITCH DIAMETER
MIN
0.223 INCH
MAJOR DIAMETER
MAX
0.249 INCH
MAJOR DIAMETER
MIN
0.243 INCH
MINOR DIAMETER
MAX
0.207 INCH
Metric Thread Size

Find the available Internal and External Thread characteristics
for a 5 mm, 0.75 mm Pitch screw with a Tolerance Class of 4H:
Note: The default Metric Tolerance Class is 6H (Internal). To view the
current Tolerance Class, press gt after entering the desired
Thread Size. To change the class, press t again.
g* ALL CLEARED
0.
1. Set Tolerance Class to Internal 4H:

4gt (Thread Class)
MM INT. THREAD
4H
4.

5mt
THREAD SIZE
4H
5. - MM
3. Enter the Thread Pitch and store the final Thread Size:
.75t
THREAD SIZE
4H
5. - 0.75 MM

t
TAP DRILL SIZE

4.250 MM
(cont'd)
User's Guide 47
(cont'd)
t
ROLL TAP DRILL

#14
0.182 inch
CLOSE FIT DRILL

5.300 MM
FREE FIT DRILL

5.800 MM
PITCH DIAMETER
MIN
4.513 MM
PITCH DIAMETER
MAX
4.588 MM
MINOR DIAMETER
MIN
4.188 MM
MINOR DIAMETER
MAX
4.306 MM
MAJOR DIAMETER
MIN
5.000 MM
5. Switch to External 4g Tolerance Class:

gtt (Thread Class)
MM EXT. THREAD
4g
4.

characteristics:
O
0.
THREAD SIZE
4g
5. - 0.75 MM
ROD SIZE
5.000 MM
COLD FORM SIZE

4.452 MM
PITCH DIAMETER
MAX
4.491 MM
PITCH DIAMETER
MIN
4.435 MM
MAJOR DIAMETER
MAX
4.978 MM
MAJOR DIAMETER
MIN
4.888 MM
t MINOR DIAMETER
MAX
4.166 MM
Custom Thread Percentage
The Machinist Calc Pro 2 uses a default Thread Grip
Percentage of 75% when calculating Tap Drill sizes. With the
custom Percentage Thread function, you can enter a different
value to calculate Tap Drill sizes.
Calculate the Tap Drill Size for a 0.25 Inch, 26 TPI screw, then
change the Thread Grip Percentage to 50% and calculate the
new Tap Drill Size:
g* ALL CLEARED
0.
1. Enter the Thread Size and calculate the Cut Tap and Roll Tap
Drill Sizes:
.25it
THREAD SIZE
2B
0.25 - INCH
26t
THREAD SIZE
2B
0.25 - 26 INCH
THREAD PITCH
0.038 INCH
TAP DRILL SIZE

#3
0.213 INCH
t*
ROLL TAP DRILL

5.900 MM
(cont'd)
User's Guide 49
(cont'd)
2. Change the Thread Grip Percentage to 50% and calculate
the new Cut Tap and Roll Tap Drill Sizes:
50gn (% of Thread) THREAD % - GRIP
50.
THREAD SIZE
2B
0.25 - 26 INCH
THREAD PITCH
0.038 INCH
TAP DRILL SIZE

#1
0.228 INCH
ROLL TAP DRILL

6.000 MM
* Repeated presses of t will scroll through the inputs and outputs

starting with the close Fit Drill Size.
WIRE SIZES AND 3-WIRE MEASUREMENTS

Wire Size
If you know your Thread Size, you can find the Ideal,
Maximum and Minimum Wire Sizes you can use for that size
Screw Thread.
Find the Ideal, Maximum and Minimum Wire Sizes for
measuring a 0.375" Thread with 16 Threads per Inch:
OO
0.

.375it
THREAD SIZE
2B
0.375 - INCH
2. Enter the Threads per Inch:

16t
THREAD SIZE
2B
0.375 - 16 INCH
3. Find the Ideal, Maximum and Minimum Wire Sizes:

gS (Wire Size)
IDEAL WIRE SIZE

0.036 INCH
MAX WIRE SIZE

0.056 INCH
MIN WIRE SIZE

0.035 INCH
3-Wire Measurement Known Thread Size and Wire Size

You can find the Minimum and Maximum 3-Wire
Measurements as well as the Pitch Diameters if you know the
Thread Size and the Wire Size you want to use.
Note: When solving for 3-Wire Measurements and Pitch Diameters,
the calculator assumes the equivalent External Thread Type if an
Internal Thread Type is set (i.e., Internal 2B is assumed External
2A for U.S. Threads; Internal 6H is assumed External 6h for Metric
Threads).
Find the Minimum and Maximum allowable 3-Wire

Measurements and Pitch Diameters for a 0.375 16, Class 2A
(External) screw using 0.040 Inch wire:
0.
OO
1. Set the Thread Class to 2A:
2gt* (Thread Class)
U.S. EXT. THREAD

2a
2.
* If necessary, continue pressing t until the desired External

Thread Class is displayed.

.375it
THREAD SIZE
2A
0.375 - INCH
(cont'd)
User's Guide 51
(cont'd)
16t
THREAD SIZE
2A
0.375 - 16 INCH
4. Enter the Wire Size**:

.04gS (Wire Size)
STORED WIRE SIZE

0.04 INCH
5. Find the Minimum 3-Wire Measurement:

gR (3W Measure)
3-WIRE MEASURE
MIN
0.395 INCH
6. Find the Maximum 3-Wire Measurement:

R
3-WIRE MEASURE
MAX
0.399 INCH
7. Find the Minimum Pitch Diameter:

R
PITCH DIAMETER
MIN
0.329 INCH
8. Find the Maximum Pitch Diameter:

R
PITCH DIAMETER
MAX
0.333 INCH
STORED WIRE SIZE

0.04 INCH
** If no Wire Size is entered, the calculated Ideal Wire Size will be

used to find the 3-Wire Measurement.
Pitch Diameter Known 3-Wire Measurement and Wire Size

You can also find the measured Pitch Diameter if you know
the 3-Wire Measurement and the Wire Size used to obtain the
measurement.
Find the Pitch Diameter of a 0.375 -16, Class 2A (External)
screw with a 3-Wire Measurement of 0.3975 Inches obtained
using a 0.040 Inch wire:
52 Machinist
OO
Calc Pro 2
0.
1. If necessary, set the Thread Class to 2A:

2gt* (Thread Class)
U.S. EXT. THREAD

2A
2.
* If necessary, continue pressing t until the desired External

Thread Class is displayed.

.375it
THREAD SIZE
2A
0.375 - INCH

16t
THREAD SIZE
2A
0.375 - 16 INCH
4. Enter the Wire Size**:

.04gS (Wire Size)
STORED WIRE SIZE

0.04 INCH
5. Enter the 3-Wire Measurement:

.3975gR 3-WIRE MEASURED
(3-W Measure)
0.3975 INCH
6. Find the Pitch Diameter:
R
PITCH DIAMETER
0.332 INCH
STORED WIRE SIZE

0.04 INCH
**If no Wire Size is entered, the calculated Ideal Wire Size will be
used to find the Pitch Diameter.
User's Guide 53
BOLT PATTERN
With the Machinist Calc Pro 2, you can determine a Bolt
Pattern by entering the Bolt Circle Diameter, the Number of
Bolt Holes and the Angle of the first bolt hole (optional). You
can also enter an optional center x and y-coordinate of the
Bolt Pattern.
In addition to calculating the x and y-coordinates for each bolt
hole, the Bolt Pattern function also calculates the hole centerto-center spacing (i.e. On-center distance from hole to hole).
X2,Y2
X1,Y1
Start
Angle
XC,YC
X3,Y3
Bolt Pattern
Calculate the Bolt Pattern for a layout with a 3.5" Diameter,
a 20 Start Angle and 3 Bolts. The center x-coordinate is 10"
and the center y-coordinate is 15".
Note: When determining angles, 0 is at the 3 o'clock position and
the rotation goes counterclockwise.
0.
OO
1. Enter the center x-coordinate:
10ia
ADJACENT
(x)
10. INCH
OPPOSITE
(y)
15. INCH
2. Enter the center y-coordinate:

15io
3. Enter the Start Angle:

20n
ANGLE
()
20.
4. Enter Bolt Circle Diameter:

3.5d
diameter
3.5 INCH
5. Enter the Number of Bolts:

3gd (Bolt Pattern)
NUMBER OF BOLTS
3.
6. Calculate center-to-center Spacing and the x and y

coordinates:
d
OC SPACING
3.031 INCH
BOLT POSITION
X-1
11.644 INCH
BOLT POSITION
Y-1
15.599 INCH
BOLT POSITION
X-2
8.659 INCH
BOLT POSITION
Y-2
16.125 INCH
BOLT POSITION
X-3
9.696 INCH
BOLT POSITION
Y-3
13.277 INCH
BOLT CIRCLE DIA

X-2
3.500 INCH
BOLT PATTERN CTR

X-
10.000 INCH
(cont'd)
User's Guide 55
(cont'd)
d
BOLT PATTERN CTR

Y-
15.000 INCH
STARTING ANGLE
20.000
right triangle functions

With the Machinist Calc Pro 2, you can easily solve Right
Triangle problems by simply entering two of four variables:
Adjacent, Opposite, Hypotenuse or Angle.
Right Triangle Based on Adjacent and Opposite Legs
Calculate the Hypotenuse, Angle and Adjacent Angle of a right
triangle with an Adjacent Leg of 3 Inches and an Opposite Leg
of 4 Inches:
B
Opposite
Leg: 4
Hypotenuse
Adjacent
Leg: 3
0.
OO
1. Enter the Adjacent Leg Length:
3ia
adjacent
(x)
3. inch
2. Enter the Opposite Leg Length:

4io
opposite
(y)
4. inch
3. Solve for the Hypotenuse:

hypotenuse
(r)
5.000 inch
h
4. Solve for the Angle (A):
angle
()
53.130
5. Solve for the Adjacent Angle (B):

adjacent angle
36.870
Right Triangle Based on Hypotenuse and Angle

Calculate the Adjacent Angle, Adjacent Leg and Opposite Leg
of a right triangle with a Hypotenuse of 12 Inches and a known
Angle of 35.34:
0.
OO
1. Enter the Hypotenuse:
12ih
hypotenuse
(r)
12. inch
2. Enter the known Angle:

35.34n angle
()
35.34
3. Solve for the Adjacent Angle:

n adjacent angle
54.660
4. Solve for the Adjacent Leg:
a adjacent
(x)
9.789 inch
(cont'd)
User's Guide 57
(cont'd)
5. Solve for the Opposite Leg:
o opposite
(y)
6.941 inch
circle calculations
Circumference and Area Based on Diameter
Find the Area and Circumference of a circle with a Diameter of
11 Inches:
0.
OO
11id
diameter
11. inch
circular area
95.033 SQ inch
circumference
34.558 inch
basic d:m:s and trigonometry examples

Converting Degrees:Minutes:Seconds
Convert 2342'39" to decimal degrees:
OO
0.
23.42.39
dms 23.42.39
g. (dmsdeg)
23.710833
Convert 44.29 to degrees:minutes:seconds format:

OO
44.29g. (dmsdeg)
0.
dms 44.17.24
Note: Improperly formatted entries will be redisplayed in the correct

convention after any operator key is pressed. For example, 30 89'
entered will be corrected and displayed as 31 29' 0" or 31.483333.
Time Calculations Using D:M:S

Add 7 Hours 45 Minutes 33 Seconds to 11 Hours 16 Minutes
20 Seconds:
OO
0.
7.45.33+
dms 7.45.33
11.16.20=
dms 19.01.53
Trigonometric Functions
The following drawing and formulas list basic trigonometric
formulas, for your reference:
Given Side A and angle a, find:

Side C
A , a go (Cos) =
(e.g., 3i,53.13go (Cos) =)

Side B
A * a gh (Tan) =
Angle b
90 - a =
Given Side A and angle b, find:

Side B
A , b gh (Tan) =
Side C
A , b ga (Sine) =
Angle a
90 - b =
(cont'd)
User's Guide 59
(cont'd)
Given Side B and angle a, find:
Side A
B , a gh (Tan) =
Side C
B , a ga (Sine) =
Given Side C and angle a, find:

Side A
C * a go (Cos) =
Side B
C * a ga (Sine) =
Given Side A and Side C, find:

Angle a
A , C =gi (ArcCos)
Angle b
A , C = gm (ArcSine)
Given Side B and Angle b, find:

Side C
B , b go (Cos) =
Side A
B * b gh (Tan) =
(cont'd)
User's Guide 61
Hardness
120-170 HB
160-210 HB
180-230 HB
175-225 HB
175-225 HB
175-225 HB
Material
Low-carbon
Steel
Medium-carbon
Steel
High-carbon
Steel
Chromiummolybdenum
Alloy Steel
Nickelchromiummolybdenum
Alloy Steel
Chromium Alloy
Steel
52100
4340
4140
1060
1045
1020
AISI /ASTM/
SAE
100Cr6
40NiCrMo8-4
34CrNiMo6
36CrNiMo4
40NiCrMo6
41CrMo4
42CrMo4
C60 Ck 60
C45 Ck 45
C22
DIN
1.3505
1.6562
1.6582
1.6511
1.6565
1.7223
1.7225
1.0601
1.1221
1.0503
1.1191
1.0402
WR
(DIN)
SUJ 2
2258
816 M 40;
817 M 40
817 M 37
817 A 37;
818 M 40
2 S 135;
535 A 99
2541
708 M 40
SCM 4
SCM 440
SCM 440 (H)
SNB 7
SNB 24-1-5
SNCM 447
SNCM 439
2244
060 A 62
1665
1678
1672;
1650
1450
SS
S 58 C
080 M 46
055 M 15
S 20 C;
S 20 CK
S 22 C
S 45 C
S 48 C
BS
JIS
WORKPIECE MATERIALS CONVERSION TABLE (1 of 3)
Appendix A - Workpiece Material Conversion Table
Hardness
150-200 HB
150-200 HB
150-200 HB
135-185 HB
150-200 HB
200-250 HB
120 HB
Material
Austenitic
Stainless Steel
Austenitic
Stainless Steel
Martensitic
Stainless Steel
Ferritic Stainless
Steel
Mold type Tool

Steel
Hot work type

Tool Steel
Copper Al Alloy
2024-T3
H13
P20
430
410
316
304
AISI /ASTM/
SAE
1.4401
1.4436
1.4580
1.4000;
1.4001
1.4006
X5CrNiMo 17-12-2
(X4CrNiMo 17-12 2)
X3CrNiMo 17-13-3
(X5CrNiMo 17-13-3)
X6CrNiMoNb 17-12-2
X6Cr13, X7Cr14
X12Cr13; X10Cr13;
GX12Cr13
AlCuMg2
X40CrMoV51
3.1355
1.2344
1.2330
1.4016
1.4306
1.4311
1.4301
X5CrNi18-9
X2CrNi19-1;
GX2CrNiN18-9
X2CrNiN18-10
X5CrNi18-10
(X4CrNi18-10)
X6Cr17
WR
(DIN)
DIN
BH13
2L97,
2L98
A2024,
A3x4
430S17;
430 S 18
403 S 17
410S21;
410 C 21; ANC 1A
2242
2320
2301
2302
2347
2343
2352
2371
2332
2333
304 S 11; LW 20,

LWCF 20, S. 536,
T. 74, 304 C 12
(LT 196),
305 S 11, 304 S 61,
304 S 15;
304S16; 304 S 17;
LW21; LWCF 21;
304 S 31
316S13,
17, 19,
31, 33
LW23; LWCF 23
318 S 17
SS
BS
SKD61
SUS 430
SUS 403,
410 S, 429
SUS 410
SUS 316
SCS 19,
SUS 304 L
SUS 304LN
SUS 304
JIS
(cont'd)
User's Guide 63
Hardness
95 HB
125 HB
32-36 HRC
38-41 HRC
36 HRC
89 HRB
37 HRC
Material
Magnesium and
Silicon Al Alloy
Silicon, Copper,
and Magnesium
Cast Al
Ti-6Al-4V Alloy
Ti-10V-2Fe-3Al
Alloy
Nickel-base
Heat Resistant
alloys
Nickel-base
Heat Resistant
alloys
Cobalt-base
Heat Resistant
alloy
Haynes alloy 188
Alloy X
Alloy 718
Beta alloy
Alpha-beta alloy
A390.0-T5
6061-T6
AISI /ASTM/
SAE
NiCr22FeMo
NiCr19Fe19NbMo
TiAl6V4
AlMgSiCu
DIN
2.4665
2.4668
3.3211
WR
(DIN)
A6061,
A2x4
JIS
BS
HR6,204
HR8
TA 10-13; TA 28
6061, H20, L117, L118
SS
appendix B default settings

After a Clear All (g*), your calculator will return to the
following settings:
STORED VALUES
DEFAULT VALUE
Material
None
Process
Face Milling
Tool
High Speed Steel Tool
Number Of Teeth
Drill Cut Angle
118
Weight per Volume
490 Pounds Per

Cubic Foot
% Thread Grip
75%
Thread Classification
U.S. Threads
Internal 2B
Metric Threads
Internal 6H
If you replace your batteries or perform a Full Reset* (turn calculator

off, hold down * and press O) your calculator will return to the
following settings (in addition to those listed above):
PREFERENCE SETTINGS
Default Value
Default Unit Format Mode
U.S. Mode
Fractional Resolution
1/64"
Functional Result Rounding 0.0000

Area Answer Format
Standard
Volume Answer Format
Standard
Fractional Mode
Standard
Mathematical Operation
Order of Operations
* Depressing the Reset button located above the d key will also
perform a Full Reset.
appendix c preference settings

The Machinist Calc Pro 2 has Preference Settings that allow
you to customize or set desired unit formats and calculations.
If you replace your batteries or perform a Full Reset* (turn
calculator off, hold down *, and press O), your
calculator will return to the following settings (in addition to
those listed on the previous page), with the default setting for
each preference listed first:
*Depressing the Reset button located above the d key will also
perform a Full Reset.
PREFERENCE
OPTIONS
1) Default Unit
Format Mode
U.S. Mode: unitless values

stored within Machinist functions
are automatically assigned the
corresponding default U.S. units of the
selected function.
Metric Mode: unitless values
stored within Machinist functions
are automatically assigned the
corresponding default Metric units of
the selected function.
2) Fractional
Resolution
1/64: displays fractional values to the

nearest 64th of an Inch.
nearest half Inch.
nearest quarter of an Inch.
nearest 32nd of an Inch.
(cont'd)
User's Guide 65
(cont'd)
3) Functional
Result
Rounding
0.000 (FIX): calculation results using

Machinist functions are always
displayed to three decimal places.
0.0000 (FIX): calculation results
using Machinist functions are always
displayed to four decimal places.
0. (ACTUAL): calculation results
using Machinist functions are always
displayed to the maximum number of
decimal places.
4) Area Answer
Format
Standard: if units entered are

the same e.g., Inch x Inch area
answers will remain in this format
(Square Inch), but if units entered are
different e.g., Inches x Feet area
answers will be displayed in Square
Feet.
Square Feet: area answers always
displayed in Square Feet, regardless
of unit entry e.g., Inches x Inches =
Square Feet.
Square Inches: area answers
always displayed in Square Inches,
regardless of unit entry e.g., Feet x
Feet = Square Inches.
Square Meters: area answers
always displayed in Square Meters,
Feet = Square Meters.
5) Volume
Answer
Format
Standard: if units entered are the

same e.g., Inch x Inch x Inch the
answer will remain in this format (Cubic
Inch), but if units entered are different
e.g., Feet x Feet x Inches volume
answer will be displayed in Cubic Inch.
Cubic Feet: volume answers always
displayed in Cubic Feet, regardless
of unit entry e.g., Inches x Inches x
Inches = Cubic Feet.
Cubic Meters: volume answers
always displayed in Cubic Meters,
Feet x Feet = Cubic Meters.
Cubic Inches: volume answers
always displayed in Cubic Inches,
Feet x Feet = Cubic Inches.
6) Fractional
Mode
Standard: fractions are displayed to

the nearest Fractional Resolution.
Constant: fractions are displayed in
the set Fractional Resolution.
7) Mathematical
Operation
Order of Operations: the

calculator uses the Order of Operations
Method (10 + 4 x 5 = 30).
Order of Entry: the calculator uses
the Order of Entry Method (as entered:
10 + 4 x 5 = 70).
User's Guide 67
APPENDIX D BASIC CALCULATOR

FUNCTIONS and dIMENSIONAL
MATH OPERATIONS
Entering dimensions
Note: Unlike other Calculated Industries/Construction Master
calculators, the Machinist Calc Pro 2 does not have a dedicated Feet
key. Feet is a secondary function located above the 7 key, so you
have to use the g key, then 7 to enter or calculate dimensions
using Feet. Below are some examples.
Enter 2 Feet, then label as square and cubic units:

2g7
2 FEET
2 square Feet
g7
2 SQ FEET
2 cubic Feet
g7
2 CU FEET
2g73i
2 FEET 3 INCH
2 Feet
Enter 2 Feet, 3 Inches:

Linear Dimensions
Examples of how linear dimensions are entered
(press O after each entry):
23 mils
23B
4.5 Inches
4.5i
95 millimeters
95m
1,320 Feet
1320g7
201 meters
201g9
Square and Cubic Dimensions

Examples of how square and cubic dimensions are entered
(press O after each entry):
14 square Inches
14ii
11 square millimeters
11mm
1.5 cubic meters
1.5g999
3 cubic Feet
3g7g7g7
conversions
Linear Conversions
Convert 10 Feet 6 Inches to other dimensions,
including metric:
OO
0.
10g76i
10 FEET 6 INCH
gB*
126.000 INCH
g7 (Feet)
10.5 FEET
gi
126. INCH
gm
3200.4 MM
g5 (cm)
320.04 CM
g9 (m)
3.2004 M
* Converting a linear value using the B key will result in the

decimal Inch equivalent of the value, rounded to three decimal
places. Only unitless values are multiplied by 0.001 Inches when
using this key.
Convert 15 Feet 9-1/2 Inches to decimal Feet. Then convert

back to Feet-Inch-Fractions.
OO
0.
15g79i1/2
15 FEET 9-1/2 INCH
g7 (Feet)
15.791667 FEET
g7
15 FEET 9-1/2 INCH

(cont'd)
User's Guide 69
(cont'd)
Convert 17.32 Feet to Feet-Inch-Fractions:
OO
0.
17.32g7 (Feet)
17.32 FEET
= g7
17 FEET 3-27/32 INCH
g7
17.32 FEET
gi
207.84 INCH
g7g7
17 FEET 3-27/32 INCH
Convert 8-1/8 Inches to decimal Inches. Then convert to

decimal Feet:
OO
0.
8i1/8
8-1/8 INCH
gi
8.125 INCH
g7 (Feet)
0.6770833 FEET
Convert 9.0625 Inches to decimal Feet.

OO
0.
9.0625i
9.0625 INCH
g7 (Feet)
0.7552083 FEET
Square and Cubic Conversions

Convert 6 square Feet to other square dimensions:
OO
0.
6g7g7 (Feet)
6 SQ FEET
gm
557418.24 SQ MM
g9 (m)
0.5574182 SQ M
g 5 (cm)
5574.1824 SQ CM
Convert 0.05 cubic meters to other dimensions:

OO
0.
. 05g999 (m)
0.05 CU M
gm
50000000. CU MM
g5 (cm)
50000. CU CM
gi
3051.1872 CU INCH
g7 (Feet)
1.7657333 CU FEET
Weight Conversions
Convert 1.5 tons to pounds and kilograms:
OO
0.
1.5g6 (tons)
1.5 TON
g1 (kg)
1360.7771 KG
g4 (lbs)
3000. LBS
Weight per Volume and Volume Conversions

Convert 2 cubic Feet of stainless steel to pounds, tons,
kilograms, and metric tons if the steel weighs 7,480 kilograms
per cubic meter:
0.
OO
1. Store the weight per volume:
7480g0000* KG/CU. METER
(wt/vol)
7480.
2. Enter steel volume:

2g7g7g7
2 CU FEET
3. Convert to pounds, tons, kilograms and metric tons:

g4 (lbs)
LBS. 933.92229
(cont'd)
User's Guide 71
(cont'd)
g6 (tons)
TON 0.4669611
g1 (kg)
KG 423.62003
g3 (met tons)
MTON 0.42362
4. Change the weight per volume back to the default value:

490g00 (wt/vol)
LBS./ CU. FEET
490.
* The number of 0 presses may vary, depending on the last units

displayed when wt/vol was last recalled/stored. By default, pounds
per cubic foot is displayed first.
Calculating Percentages
The % key can be used for finding a given percent of a
number or for working add-on, discount or division percentage
calculations. It can be used with any type of number, in
any dimension (Feet, Inch, millimeter, etc.) and any type of
convention (non-dimensioned, linear, square or cubic).
Find 18% of 50 Feet:
OO
0.
50g7*18%
9. FEET
Take 20% from 17 Feet 6 Inches:

17g76i-20%
14 FEET 0 INCH
BASIC MATH OPERATIONS

Adding and Subtracting Dimensions
Add the following measurements:
6 Feet 2-1/2 Inches
11 Feet 5-1/4 Inches
18.25 Inches
Then subtract 2-1/8 Inches:
6g72i1/2+
6 FEET 2-1/2 INCH
11g75i1/4+
17 FEET 7-3/4 INCH
18.25i=
19 FEET 2 INCH
-2i1/8=
18 FEET 11-7/8 INCH
Multiplying Dimensions
Multiply 5 Feet 3 Inches by 11 Feet 6-1/2 Inches:
5g73i*
5 FEET 3 INCH
11g76i1/2=
60.59375 SQ FEET
Multiply 2 Feet 7 Inches by 10:

2g77i*10=
25 FEET 10 INCH
Dividing Dimensions
Divide 30 Feet 4 Inches by 7 Inches:
30g74i,7i=
52.
Divide 20 Feet 3 Inches by 9:

20g73i,9=
2 FEET 3 INCH
User's Guide 73
appendix E accuracy/errors, auto

shut-off, batteries, reset
Error Codes
DISPLAY
ERROR TYPE
OVERFLOW
Overflow (too large)
MATH ERROR
Divide by 0
DIMENSION ERROR
Dimension error
ENTRY ERROR
Invalid entry error
auto shut-off
Your calculator is designed to shut off after about 4 minutes of
non-use.
battery
The Machinist Calc Pro 2 uses one CR2025 (included). This
should last approximately 800 hours of actual use. Should
your calculator display become very dim or erratic, replace the
battery.
Note: Please use caution when disposing of your
old battery, as it contains hazardous chemicals.
Replacement batteries are available at most
discount or electronics stores. You may also call
Calculated Industries at 1-775-885-4900.
Battery Replacement Instructions

While the calculator is off, turn the calculator over and use a
#1 Phillips screwdriver to remove the battery holder screw
located near the center at the top. With the screw removed,
pull battery holder out, remove old battery, and slide new
battery into holder. The negative side of the battery should be
facing you as you insert the battery holder into the calculator.
Replace screw using a #1 Phillips screwdriver.
reset
If your calculator should ever "lock up," insert the tip of a
paperclip or a small diameter wire into the small Reset hole
above the d key.
repair and return

return guidelines
1. Please read the Warranty in this User's Guide to
determine if your Calculated Industries product remains
under warranty before calling or returning any device for
evaluation or repairs.
2. If your product won't turn on, check the battery as outlined
in the User's Guide.
3. If you need more assistance, please go to the website
listed below.
4. If you believe you need to return your product, please call a
Calculated Industries representative from 7 a.m. to
4 p.m. Pacific Time for additional information and a Return
Authorization (RA).
Call Toll Free: 1-800-854-8075
Outside USA: 775-885-4900
www.calculated.com/warranty
User's Guide 75
warranty
Calculated Industries ("CI") warrants this product against
defects in materials and workmanship for a period of one (1)
year from the date of original consumer purchase in the U.S.
If a defect exists during the warranty period, CI at its option
will either repair (using new or remanufactured parts) or
replace (with a new or remanufactured calculator) the product
at no charge.
THE WARRANTY WILL NOT APPLY TO THE PRODUCT
IF IT HAS BEEN DAMAGED BY MISUSE, ALTERATION,
ACCIDENT, IMPROPER HANDLING OR OPERATION,
OR IF UNAUTHORIZED REPAIRS ARE ATTEMPTED OR
MADE. SOME EXAMPLES OF DAMAGES NOT COVERED
BY WARRANTY INCLUDE, BUT ARE NOT LIMITED TO,
BATTERY LEAKAGE, BENDING, A BLACK "INK SPOT" OR
VISIBLE CRACKING OF THE LCD, WHICH ARE PRESUMED
TO BE DAMAGES RESULTING FROM MISUSE OR ABUSE.
To obtain warranty service in the U.S., please go to the
website. A repaired or replacement product assumes the
remaining warranty of the original product or 90 days,
whichever is longer.
Non-Warranty Repair Service U.S.A.
Non-warranty repair covers service beyond the warranty
period, or service requested due to damage resulting from
misuse or abuse. Contact Calculated Industries at the number
listed above to obtain current product repair information and
charges. Repairs are guaranteed for 90 days.
Repair Service Outside the U.S.A.

To obtain warranty or non-warranty repair service for goods
purchased outside the U.S., contact the dealer through which
you initially purchased the product. If you cannot reasonably
have the product repaired in your area, you may contact CI
to obtain current product repair information and charges,
including freight and duties.
Disclaimer
CI MAKES NO WARRANTY OR REPRESENTATION,
EITHER EXPRESS OR IMPLIED, WITH RESPECT
TO THE PRODUCT'S QUALITY, PERFORMANCE,
MERCHANTABILITY, OR FITNESS FOR A PARTICULAR
PURPOSE. AS A RESULT, THIS PRODUCT, INCLUDING
BUT NOT LIMITED TO, KEYSTROKE PROCEDURES,
MATHEMATICAL ACCURACY AND PREPROGRAMMED
MATERIAL, IS SOLD "AS IS," AND YOU THE PURCHASER
ASSUME THE ENTIRE RISK AS TO ITS QUALITY AND
PERFORMANCE. IN NO EVENT WILL CI BE LIABLE
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES RESULTING FROM ANY
DEFECT IN THE PRODUCT OR ITS DOCUMENTATION.
The warranty, disclaimer, and remedies set forth above are
exclusive and replace all others, oral or written, expressed
or implied. No CI dealer, agent, or employee is authorized to
make any modification, extension, or addition to this warranty.
Some states do not allow the exclusion or limitation of implied
warranties or liability for incidental or consequential damages,
so the above limitation or exclusion may not apply to you. This
warranty gives you specific rights, and you may also have
other rights, which vary from state to state.
User's Guide 77
FCC Class B
This equipment has been certified to comply with the limits for
a Class B calculating device, pursuant to Subpart J of Part 15
of FCC rules.
Legal Notes
Software copyrighted and licensed by Calculated Industries,
Inc., 2014. User's Guide copyrighted by Calculated Industries,
Inc., 2014. Machinist Calc and Calculated Industries are registered trademarks of Calculated Industries, Inc. 2014.
ALL RIGHTS RESERVED
Designed in the U.S.A.
Looking for New Ideas

Calculated Industries, a leading manufacturer of specialfunction calculators and measuring instruments, is always
looking for new product ideas in these areas.
If you have a new product idea, please visit our "Bright Idea"
page at www.calculated.com/brightidea.asp. For suggestions
about improving this product or other products, please visit us
at www.calculated.com under "Contact Us". Thank You.
User's Guide 79
4840 Hytech Drive

Carson City, NV 89706 U.S.A.
1-800-854-8075 Fax: 1-775-885-4949
E-mail: info@calculated.com
www.calculated.com
Designed in the United States of America.

Printed in China.
11/14
UG4088E-B

Machinist Calc Pro 2UG4088E-B

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Machinist calc pro 2

The Machinist Calc Pro 2 Advanced Machining Math +

USING THE MACHINIST CALC PRO 2..................................15

Basic Function Keys

On/Clear Key Turns on power. Pressing once

gO Off Turns all power off. Clears all nonpermanent values.

Keys used for entering numbers.

Convert Used with the dimensional keys to

Store Used for storing values.

Storage Registers M1 through M9 Used to

Recall Used with other keys to recall stored

Memory Clear Clears Accumulative Memory

Accumulative Memory Adds displayed value to

M- Subtracts displayed value from

Dimensional Function Keys

Millimeters (mm) Identifies entry as

Centimeters (cm) Identifies entry as

Meters (m) Identifies entry as meters, with

Feet Identifies entry as Feet, with repeated

Inch Identifies entry as Inches, with

Fraction Bar Used to enter fractions.

1/1000" (mils) Multiplies a dimensionless

6 Machinist Calc Pro 2

Weight and Volume Function Keys

Tons Enters or converts a weight or volume

Pounds (lbs) Enters or converts a weight or

Metric tons (met tons) Enters or converts a

Grams Enters or converts a weight or

Kilograms (kg) Enters or converts a weight

Weight per Volume (wt/vol) Stores a new

Trigonometric Function Keys

Sine Calculates the Sine of an entered

ArcSine Calculates the angle for the entered

Cosine Calculates the Cosine of an entered

ArcCosine (ArcCos) Calculates the angle

Tangent (Tan) Calculates the Tangent of an

ArcTangent (ArcTan) Calculates the angle

Percentage Used to find a given percent of a

x2 Squares the value on the display.

Backspace Function Used to delete entries

Square Root (!) Calculates the Square

Reciprocal (1/x) Finds the Reciprocal of a

Clear All Returns all stored values to the

Change Sign (+/-) Toggle displayed value

Pi Displays value of (3.1415927).

Preference Settings (Prefs) Accesses

Machinist Function Keys

8 Machinist Calc Pro 2

Diameter Enters a Diameter. Calculates circle

Bolt Pattern Enters the number of holes in a

Material Scrolls through 20 Material types.

gN Depth of Cut (DOC) Enters a Cut Depth for

Process Scrolls through six Processes:

Width of Cut (WOC) Enters a Cut Width for

Tool Scrolls through three Tool Types:

Length of Cut (LOC) Enters a Cut Length to

Surface Feet per Minute Enters or calculates

Wire Size Enters or calculates Wire Size

Revolutions per Minute Enters or

3-Wire Measurement (3W Measure) Enters or