REFERENCES
- Naka , M. , “ Lubricating Greases for Ball Bearings Operating at High Temperatures and High Speeds ,” NSK Tech. Jour. , 650 , pp 12 – 20 ( 1989 ).
- Ito , H. , Koizumi , H. and Naka , M. , “ Grease Life Equations for Sealed Ball Bearings ,” in Proc. of Int'l. Trib. Conf. , Yokohama , pp 931 – 936 ( 1995 ).
- Endo , T. , “ Recent Developments in Diurea Greases ,” NLGI Spokesman , 57 , 1 , pp 532 – 541 ( 1993 ).