Title: Grease composition and method for production thereof, and rolling bearing having the grease composition sealed therein
Application Number: 200580006611 Application Date: 2005.02.28
Publication Number: 1926224 Publication Date: 2007.03.07
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C10M135/00;C10M135/04;C10M135/06;C10M135/18;C10M137/10;C10M169/06;C10M177/00;F16C33/66;C10M115/08;C1
Applicant(s) Name: NTN Co., Ltd. Address:
Inventor(s) Name:
Attorney & Agent: chencuan
Abstract:
    To provide a grease composition which is excellent in long-term durability and prevents wear and friction on a lubricating surface under a high load or under the risk of sliding movement, a preparation method whereby the proportion of an extreme-pressure agent to be added to the grease composition can be easily determined, and an antifriction bearing filled with the grease composition. The grease composition is prepared by adding a thickener and an extreme-pressure agent containing sulfur within its molecular structure to a base oil. The extreme-pressure agent is added so that the product of the active sulfur content (mgS/g) in the extreme-pressure agent and the amount (wt.%) of the extreme-pressure agent added to the grease composition becomes 3-13.
Time: 6