Accession Number:

ADA022157

Title:

Surface Endurance and Lubrication of Silicon Nitride Ball Bearings.

Descriptive Note:

Final rept. Nov 74-Nov 75,

Corporate Author:

SKF INDUSTRIES INC KING OF PRUSSIA PA RESEARCH LAB

Personal Author(s):

Report Date:

1975-12-01

Pagination or Media Count:

81.0

Abstract:

A report is made on the effect of using silicon nitride balls on the rolling contact fatigue life of radially loaded M50 steel ball bearings. Scanning electron microscope SEM examination of the surface topography of as-manufactured silicon nitride ball surfaces is described and compared with silicon nitride ball and flat washer surfaces tested previously. The rolling-contact fatigue performance of previously tested all-tool-steel bearings is compared with the present group of bearings containing silicon nitride balls as well as with previously tested silicon nitride flat washers run against tool steel rollers. It is shown that the life of the present group of bearings is controlled by the life of the currently available silicon nitride ball complement. This is contrary to the previous flat washer life results. The ball groove surfaces of the present steel bearing rings after running against the silicon nitride balls is described.

Subject Categories:

  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE