F - Mech Eng,Light,Heat,Weapons – 16 – C
Patent
F - Mech Eng,Light,Heat,Weapons
16
C
F16C 33/66 (2006.01) C10M 169/02 (2006.01) F16C 19/16 (2006.01) F16C 33/58 (2006.01) F16H 55/32 (2006.01) F16H 57/04 (2010.01)
Patent
CA 2266204
According to the present invention, PAO oil and ester oil are mixed in a ratio by weight of from 50:50 to 90:10 to provide a base oil having a viscosity of not more than 70 mm2/S at 40° C, to which base oil is then added 5-25% by weight of diurea, which is an alicyclic compound, serving as a thickener, and ZnDTC, which is an additive. The grease thus prepared is filled in a bearing 2. This bearing 2 is fitted in the inner portion of a pulley body 1 having a pulley peripheral surface 1e to be contacted by a belt driven by the engine of an automobile. Thereby, brittle peeling occurring in the raceway surfaces and ball surfaces, and abnormal noise under cold ambient can be reliably prevented.
Koremoto Takahiro
Nozaki Seiichi
Ntn Corporation
Ridout & Maybee Llp
LandOfFree
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