EFFECT OF SURFACE-LAYER QUALITY ON THE USEFUL LIFE OF ROLLER BEARINGS,
Abstract
The report presents the results of an investigation of the possibilities of increasing the useful life of roller bearings by improving the surface-layer quality of the operating surfaces of the rollers and of the bearing races. Conclusions are: (1) Grinding cannot be regarded as a final operation in finishing of the operating surfaces of bearings, since the microdefects resulting from the grinding operation lower the efficiency of the surface layers. (2) In the final lapping operations it is necessary to remove the defective layer of 0.15-0.02 mm obtained as the result of the preliminary grinding operation. (3) In dull polishing of rollers and manual polishing of the bearing races a surface layer of low quality is obtained. There is a considerable improvement in the quality of the surface-layer finish and a 30-40-percent increase in useful life after lapping operations: bright polishing of the rollers and superfinishing of the bearing races. (4) In preliminary grinding of the rollers and races it is necessary to introduce machine truing of the grinding wheels and to perform this operation regularly after having removed a specified amount of the bearing part. (5) An increase in surface-finish quality of the operating surfaces to class 10 will permit the plant to increase the useful life of bearings by 30%. (6) The existing technological process does not ensure the required precision in contact between the roller and the bearing race: only a band with a width of 2-4mm is involved in the operation of the bearing. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 28, 1966
- Accession Number
- AD0646519
Entities
People
- L. G. Kuklin
Organizations
- National Air and Space Intelligence Center