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Patent Searching and Data


Title:
GREASE-SEALED BALL-AND-ROLLER BEARING
Document Type and Number:
Japanese Patent JPH10130682
Kind Code:
A
Abstract:

To obtain a ball-and-roller bearing which exhibits lubricity from the beginning of low-temp. driving and does not cause an abnormal sound even in cold districts by sealing, into the bearing, a lubricating grease prepd. by compounding a base oil with a thickener under specified conditions.

A lubricating grease is prepd. by compounding a base oil (e.g. a mineral oil, a synthetic hydrocarbon oil, or a polyol ester oil) with a soap-base or nonsoap-base thickener (e.g. a lithium soap, a lithium complex soap, or a fluroresin) and other additives while controlling the amt. and type of the thickener and the cooling rate in the production so that the resultant grease has an unworked penetration (JIS K2220) at -20°C of 190-290 and a worked penetration (JIS K2220) at 25°C of 220-310. For instance, 100 pts.wt. base oil comprising a mixture of a synthetic hydrocarbon (oil) and an ester-base synthetic oil is compounded with 12 pts.wt. aliph. urea compd. as the thickener together with an antioxidant, an extreme-pressure additive, etc., to give a grease having an unworked penetration at -20°C of 190.


Inventors:
NANBU TOSHIKAZU
AKAMATSU YOSHINOBU
Application Number:
JP28657096A
Publication Date:
May 19, 1998
Filing Date:
October 29, 1996
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD
International Classes:
C10M169/02; C10M171/00; C10M177/00; F16C33/66; C10N20/00; C10N40/02; (IPC1-7): C10M169/02; C10M171/00; F16C33/66
Attorney, Agent or Firm:
Bunji Kamata (2 outside)