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    VC & VF PDF

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    Puneeth Kumar
    This document provides recommendations for speeds, feeds, and coolants for drilling with high-speed steel (HSS) drills. It recommends drilling speeds ranging from 10 to 400 feet per minute depending on the material being drilled. It also provides recommendations for appropriate coolants to use, such as soluble oil, paraffin, or keeping the drill cool with an air jet. The document concludes by recommending drill feeds per revolution ranging from 0.004 to 0.050 inches based on drill diameter.

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    VC & VF PDF

    Uploaded by

    Puneeth Kumar
    53 views1 page
    This document provides recommendations for speeds, feeds, and coolants for drilling with high-speed steel (HSS) drills. It recommends drilling speeds ranging from 10 to 400 feet per minute depending on the material being drilled. It also provides recommendations for appropriate coolants to use, such as soluble oil, paraffin, or keeping the drill cool with an air jet. The document concludes by recommending drill feeds per revolution ranging from 0.004 to 0.050 inches based on drill diameter.

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    This document provides recommendations for speeds, feeds, and coolants for drilling with high-speed steel (HSS) drills. It recommends drilling speeds ranging from 10 to 400 feet per minute depending on the material being drilled. It also provides recommendations for appropriate coolants to use, such as soluble oil, paraffin, or keeping the drill cool with an air jet. The document concludes by recommending drill feeds per revolution ranging from 0.004 to 0.050 inches based on drill diameter.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    53 views1 page

    VC & VF PDF

    Uploaded by

    Puneeth Kumar
    This document provides recommendations for speeds, feeds, and coolants for drilling with high-speed steel (HSS) drills. It recommends drilling speeds ranging from 10 to 400 feet per minute depending on the material being drilled. It also provides recommendations for appropriate coolants to use, such as soluble oil, paraffin, or keeping the drill cool with an air jet. The document concludes by recommending drill feeds per revolution ranging from 0.004 to 0.050 inches based on drill diameter.

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    © All Rights Reserved
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    Speeds & Feeds for HSS Drills

    RECOMMENDED SPEEDS AND COOLANTS FOR HSS DRILLS


    SPEED
    MATERIALS TO BE DRILLED COOLANT
    FEET PER MINUTE METRES PER MINUTE
    Aluminum & Aluminum Alloys 200 to 300 61 to 92 Soluble Oil. Paraffin.
    Bakelite - Vulcanite 100 to 150 30 to 46 Dry. If possible, keep the drill cool with air jet.
    Brass 150 to 200 46 to 76 Dry. Soluble Oil.
    Brass - Leaded 200 to 300 61 to 92 Dry. Soluble Oil.
    Bronze - Ordinary 100 to 200 30 to 61 Soluble Oil.
    Bronze - High Tensile 70 to 100 22 to 30 Soluble Oil.
    Cast Iron - Soft 100 to 150 30 to 46 Dry. If possible, keep the drill cool with air jet.
    Cast Iron - Medium 80 to 90 24 to 27 Soluble Oil.
    Cast Iron - Hard 50 to 70 15 to 22 Dry. If possible, keep the drill cool with air jet.
    Cast Iron - Chilled 25 to 35 8 to 11 Soluble Oil.
    Copper 100 to 200 30 to 61 Soluble Oil.
    Duralumin 100 to 200 30 to 61 Dry. Soluble Oil.
    Magnesium & Magnesium Alloys 250 to 400 76 to 122 Dry. If possible, keep the drill cool with air jet.
    Malleable Iron 70 to 80 22 to 24 Soluble Oil.
    Mazak 200 to 300 61 to 91 Soluble Oil.
    Monel Metal 40 to 50 12 to 15 Soluble Oil. Sulphurized Oil.
    Slate, Stone, Marble 15 to 20 5 to 6 Dry. If possible, keep the drill cool with air jet.
    Steel - Free Cutting Mild 100 to 150 30 to 46 Soluble Oil. Sulphurized Oil.
    Steel - Up to 40 Tons Tensile 80 to 110 24 to 33 Soluble Oil. Sulphurized Oil.
    Steel - 40 to 60 Tons Tensile 45 to 70 14 to 22 Soluble Oil. Sulphurized Oil.
    Steel - 60 to 80 Tons Tensile 30 to 45 9 to 14 Soluble Oil. Sulphurized Oil.
    Steel - Over 80 Tons Tensile 15 to 25 5 to 8 Soluble Oil. Sulphurized Oil.
    Steel - Manganese 12%/14% 10 to 15 3 to 5 Dry.
    Stainless Steels - Martensitic & Ferritic 30 to 50 9 to 15 Sulphurized Oil.
    Stainless Steels - Austensitic & Heat Resisting 20 to 45 6 to 14 Sulphurized Oil.
    Stainless Steels - Free Cutting (Ferritic) 50 to 60 15 to 18 Sulphurized Oil.
    Stainless Steels - Free Cutting (Austenitic) 40 to 50 12 to 15 Sulphurized Oil.
    Wood 300 to 400 92 to 122 Sulphurized Oil.

    When selecting a suitable cutting lubricant, it should be remembered that soluble oil and water emulsions have good cooling properties
    and are therefore applicable to high speed working. The sulphurised cutting lubricants have good anti-weld properties and are therefore
    applicable where cutting pressures are high.
    It may be advantageous to dilute the suphurised oils with paraffin or light mineral oils in order to reduce excessive drill wear at high
    speeds.

    RECOMMENDED FEEDS FOR HSS DRILLS


    DRILL DIAMETER FEED PER REVOLUTION
    mm INCHES mm INCHES
    1.59 to 2.38 1/16 to 3/32 0.04 to 0.06 0.0015 to 0.0025
    3.18 to 3.97 1/8 to 5/32 0.05 to 0.10 0.002 to 0.004
    4.76 to 5.56 3/16 to 7/32 0.08 to 0.15 0.003 to 0.006
    6.35 to 7.94 1/4 to 5/16 0.10 to 0.20 0.004 to 0.008
    9.52 to 11.11 3/8 to 7/16 0.15 to 0.25 0.006 to 0.010
    12.70 to 14.29 1/2 to 9/16 0.20 to 0.30 0.008 to 0.012
    15.88 to 17.46 5/8 to 11/16 0.23 to 0.33 0.009 to 0.013
    REFERENCE

    19.05 to 20.64 3/4 to 13/16 0.25 to0.36 0.010 to 0.014


    22.22 to 23.81 7/8 to 15/16 0.28 to 0.38 0.011 to 0.015
    25.40 to 28.58 1 to 1-1/8 0.30 to 0.41 0.012 to 0.016
    31.75 to 38.10 1-1/4 to 1-1/2 0.36 to 0.46 0.014 to 0.018
    Over 38.1 Over 1-1/2 0.46 to 0.50 0.016 to 0.020*
    *Or greater according to diameter and local conditions.

    The speeds quoted are only a basic guide.If conditions permit, it may be possible to increase the
    above values.
    When commencing to drill new work, the slowest speed and lightest feed should be used and these
    should gradually be increased until optimum output per grind is obtained.

    H3

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