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Grease composition and rolling apparatus

Inactive Publication Date: 2005-10-06
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017] Thus, it is a first object of the present invention to solve the above described problems of the prior art techniques and to provide a grease composition which is hardly dispersed and has excellent high-temperature performance. Moreover, it is also the first object of the present invention to provide a rolling apparatus, which has low torque and excellent acoustic performance, and generates a few dusts.

Problems solved by technology

(2) Cars (passenger cars) tend to be directed towards downsizing, weight saving and the expansion of the living space, and therefore cars are forced to reduce their engine room space.
However, under a high-temperature condition of 160° C. or higher, even this grease generates seizure in an early stage, and so a grease having further higher heat resistance is required.

Method used

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  • Grease composition and rolling apparatus
  • Grease composition and rolling apparatus
  • Grease composition and rolling apparatus

Examples

Experimental program
Comparison scheme
Effect test

example a13

[0236] excellent in the amount of dusts generated, acoustic performance and torque value in the initial rotation stage. However, since the amount of the mineral oil and the synthetic oil in the base oil was smaller than the case of the perfluoropolyether oil, it was somewhat poor in durability.

[0237] Example A14 had a small amount of dusts generated and good acoustic performance in the initial rotation stage, but since the worked penetration was small, the torque value in the initial rotation stage was unsatisfactory.

[0238] Example A15 had good acoustic performance, torque value in the initial rotation stage and durability, but since the worked penetration was large, it generated a large amount of dusts in the initial rotation stage both at an ordinary temperature and at a high temperature, and further, the amount of dusts significantly increased when rotated at a high temperature for a long time in comparison with the grease compositions in Examples A1 to A12.

[0239] Next, the rat...

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Abstract

A grease composition is produced by mixing a thickener comprising a fluoro resin and a second thickener component (a metallic soap, a complex metallic soap, an N-substituted terephthalamic acid metal salt, organic bentonite or a calcium sulfonate complex) into a base oil. This grease composition is excellent in heat resistance, load carrying capacity, water resistance, rust protection, lubricating life and the like. A rolling apparatus filled with the above grease composition has excellent lubricating ability and is long-lived under high-temperature conditions. Moreover, a grease composition is produced by mixing a thickener comprising a fluoro resin and carbon black as a second thickener component into a base oil. This grease composition is excellent in heat resistance, water resistance, rust protection, lubricating life, electric conductivity and the like. A rolling apparatus filled with the above grease composition has excellent electric conductivity and is long-lived under high-temperature conditions.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a division of patent application Ser. No. 10 / 378,060, filed Mar. 4, 2003, the entire disclosure of which is incorporated herein by reference. Priority is claimed based on Japanese Patent Application Nos. 2002-062069, filed Mar. 7, 2002; 2002-073110, filed Mar. 15, 2002; 2002-252665, filed Aug. 30, 2002; and 2002-286026, filed Sep. 30, 2002.FIELD OF THE INVENTION [0002] The present invention relates to a grease composition, which hardly disperses and has excellent high-temperature performance. Moreover, the present invention relates to a rolling apparatus, which has low torque and excellent acoustic performance and generates a few dusts, and in particular, the present invention relates to a rolling apparatus, which is preferably used in electronic intelligence equipment, semiconductor manufacturing machines and others. [0003] Furthermore, the present invention relates to a grease composition having excellent lubricati...

Claims

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Application Information

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IPC IPC(8): C10M119/22C10M169/02C10M169/06
CPCC10M119/22C10M169/02C10M169/06C10M2201/041C10M2201/0416C10M2201/083C10M2201/1006C10M2201/1026C10M2201/1036C10M2203/1025C10M2205/0285C10M2207/0406C10M2207/1285C10M2207/1426C10M2207/2835C10M2211/0213C10M2211/066C10M2213/02C10M2213/043C10M2213/0626C10M2215/02C10M2215/064C10M2215/065C10M2215/223C10M2219/044C10M2219/046C10N2210/01C10N2210/02C10N2230/02C10N2230/06C10N2230/08C10N2230/10C10N2230/12C10N2230/22C10N2230/26C10N2230/60C10N2230/68C10N2250/10C10N2010/02C10N2030/02C10N2030/10C10N2030/22C10N2030/26C10N2010/04C10N2030/08C10N2030/06C10N2030/60C10N2030/68C10N2030/12C10N2050/10
Inventor NAKATANI, SHINYAFUJITA, YASUNOBUHOKAO, MICHITAMIYAJIMA, HIROTOSHI
Owner NSK LTD
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