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RESEARCH PAPERS

The Performance of Ball Bearings With Silicon Nitride Ceramic Balls in High Speed Spindles for Machine Tools

[+] Author and Article Information
Hirotoshi Aramaki, Yoshio Shoda, Yuka Morishita, Takeshi Sawamoto

Research Center, Nippon Seiko K.K. (NSK), Fujisawa, Kanagawa, Japan

J. Tribol 110(4), 693-698 (Oct 01, 1988) (6 pages) doi:10.1115/1.3261715 History: Received January 22, 1988; Online October 29, 2009

Abstract

Two types of angular contact ball bearings for machine tools having steel rings and silicon nitride balls were tested and the temperature rise was compared with that of conventional steel ball bearings with grease lubrication and oil-air lubrication as well. Experimental results indicated that the temperature rise of silicon nitride ball bearings was much lower than that of steel ball bearings at high speeds. Calculations made using a computer demonstrated that the reduction of gyroscopic moments and centrifugal forces acting on balls because of the low density of silicon nitride resulted in about 30 to 50 percent less frictional loss at high speeds even with low-cost lubrication such as grease or oil-air.

Copyright © 1988 by ASME
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