GB990553A - Improvements in or relating to roller bearings - Google Patents

Abstract

990,553. Bearings. SKEFKO BALL BEARING CO. Ltd. March 19, 1962, No. 10475/62. Heading F2A. A method of determining an axial dimension of a part of a tapered roller bearing which has a guide-ring engaging the ends of the rollers having the greatest diameter and has a guidering urged into engagement with the rollers, so that the bearing when finally assembled has a desired pre-load or clearance, comprises applying a known load to the guide-ring and towards the rollers through members which can be displaced axially in relation to one another, one of which is integral with the inner race and the other of which acts directly or indirectly on the guide-ring, and measuring a dimension which changes on relative axial movement of said members and is equal to, or is related in known manner to, the required dimension. In an embodiment the bearing has an inner race 11, Fig. 1, mounted on a shaft 14, an outer race 10 mounted in a recess 16 of a casing 15, and rollers 12 abutted by the guide-ring 13 which is engaged by a spacer-ring 17. The guidering 13 and the spacer-ring 17 are mounted on a spacer 26 and loading is effected by tightening a nut 28 on the shaft 14 which urges a coupling-member 27 towards the rollers. The thickness of the spacer-ring 17 determines the desired pre-load or clearance in the bearing. In order to determine the required thickness of the spacer-ring 17, the latter is removed along with the member 27 and the nut 28, and a device comprising telescopic members 40, 41, Fig. 2, is positioned on the shaft 14, the member 40 being attached to the shaft by a nut 42 so as to bear against the sleeve 26 and retain the parts in their assembled positions. The required load is applied by supplying pressurized fluid through a pipe 43 to a sealed space 44 between the members 40, 41 so as to force the latter against the guide-ring 13. The distance between faces 40b and 41b of the members 40, 41 is the required thickness of the spacer-ring 17 and may be determined by measuring a related distance " Y " between faces 41a and 40a of the members 41, 40. In modifications, the load is applied by springs of known ratings; and the pre-loading or clearance is effected by a spacer located between the guide-ring and the inner race, the required thickness of the spacer having been pre-determined by replacing the latter in the assembly with a plastically-deformable ring and applying the load thereto, the final thickness thereof being relative to the required thickness of the spacer. Specifications 990,551 and 990,552 are referred to.