Kyodo Yushi Co., Ltd.

Seiko Epson Corporation

Minebea Company, Limited

Hosokawa Corporation

Kenichiro Matsubara

Masamichi Yamamoto

Satoshi Nakata

Motoharu Akiyama

Junichi Imai

Terasu Yoshinari

Yuji Onuki

Ryo Aida

Koji Hosokawa

Yusuke Enomoto

Noriko Tanaka

The invention provides a grease composition for rolling bearings that can exhibit improved bearing life that can secure the low noise performance under high temperature conditions, and a rolling bearing where the above-mentioned grease composition is enclosed. The grease composition for rolling bearings includes a base oil, a urea thickener and a metal deactivator. The base oil has an aniline point of 110&#xb0; C. or more. The urea thickener is at least one kind of diurea compound selected from the group consisting of diurea compounds represented by formula (1): R&#x2014;NHCONH&#x2014;R&#x2014;NHCONH&#x2014;R(wherein Rand R, which may be the same or different from each other represent a Calkyl group, a Ccycloalkyl group or a Caryl group, and Rrepresents a bivalent aromatic hydrocarbon group having 6 to 15 carbon atoms.)

Grease composition for rolling bearings and rolling bearing

The invention provides a grease composition containing a base oil, a thickener and a rust inhibitor, characterized in that the rust inhibitor includes an organic sulfonate and a fatty acid amine salt. The grease composition of the invention exhibits excellent rust preventing characteristics and causes little damage to the environment.

Grease composition and mechanical part

The invention provides a grease composition for use in an image forming apparatus, containing a thickener, a base oil and a lubricity improver, wherein the thickener is a lithium soap, the base oil is a synthetic hydrocarbon oil, the lubricity improver is a polyethylene oxide wax, and the image forming apparatus is equipped with a sliding member and a member for holding the sliding member which is driven to slide through the holding member via the grease composition, one of the sliding member or the holding member for the sliding member having a sliding surface formed from a metal, and the other having a sliding surface formed from a resin.

Grease composition for image forming apparatus and image forming apparatus with grease composition

The invention provides a grease composition comprising a base oil consisting of a fluorinated oil and an antirust agent, wherein said antirust agent comprises an aliphatic dibasic acid salt of the formula (1) in an amount of not less than 0.1% by mass and less than 1.0% by mass based on the total mass of the grease composition:(CH)(COO)M&#x2003;&#x2003;(1)wherein n is an integer of 1 to 19, M is an alkali or alkaline earth metal, m is 2 when M is an alkali metal and m is 1 when M is an alkaline earth metal, and a bearing wherein the grease is packed. The grease exerts less effects on the environment. It is low in evaporation loss at a high temperature, shows good antirust property and can be suitably used in a ball bearing operated at a high temperature.

Grease composition and bearing

The invention provides a grease composition having (A) a lithium soap thickener, (B) as a base oil an ester type synthetic oil obtainable from an esterification reaction of trimethylolpropane with a fatty acid, and (C) (c-1) a 1-naphthylamine type antioxidant and (c-2) a diphenylamine type antioxidant, wherein the contents of (c-1) and (c-2) are 1.0 to 10 mass % in total, based on the total mass of the composition, and the ratio by mass of (c-1) to (c-2) is in the range from 30:70 to 70:30.

Grease composition for bearings with improved heat-resistant acoustic life

Growing community of inventors

Fujisawa, Japan

Kenichiro Matsubara