Grease sealed bearing for automobile
AssigneeNtn Corporation
InventorsMitsunari Asao, Hidenobu Mikami, Takayuki Kawamura, Takahiro Koremoto, Kunio Takemura
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Abstract
Disclosed is a grease sealed bearing for automobile that has the high temperature resistance as well as shear stability, and prevents the noise at low temperature as well as the brittle flaking under high speed rotation and high load. The grease comprises a base oil containing a synthesized hydrocarbon oil and one or more ester oils at a weight ratio of 0.1 to 0.49:0.9 to 0.51; 5 to 30% by weight of a urea based thickener, and 0.1 to 10% by weight of dithiozinc phosphate based on the whole grease. The grease sealed bearing for automobile is obtained by sealing a bearing used in a device driven by an automobile engine with the grease.
Claims12
A grease sealed bearing for automobile used in a device driven by an automobile engine, in which the grease comprises a base oil containing a synthesized hydrocarbon oil and one or more ester oils at a weight ratio of 0.1 to 0.49:0.9 to 0.51;
- 5 to 30% by weight of a urea based thickener, and 0.1 to 10% by weight of dithiozinc phosphate based on the whole grease, wherein the synthesized hydrocarbon oil has kinetic viscosity of 3 to 65 mm2/s at 40° C., and a pour of −50° C. or less,
- wherein the ester oil has a kinetic viscosity of 30 to 100 mm2/s at 40° C., and a pour point of −30° C. or less, wherein the urea based thickener is an alicyclic urea compound.
A grease for sealing a bearing used in a device driven by an automobile engine, comprising a base oil containing a synthesized hydrocarbon oil and one or more ester oils at a weight ratio of 0.1 to 0.49:0.9 to 0.51;
- 5 to 30% by weight of a urea based thickener, and 0.1 to 10% by weight of dithiozinc phosphate based on the whole grease, wherein the synthesized hydrocarbon oil is an aliphatic hydrocarbon oil and has a kinetic viscosity of 3 to 65 mm2/s at 40° C., and a pour point of −50° C. or less, wherein the ester oil has a kinetic viscosity of 30 to 100 mm2/s at 40° C., and a pour point of −30° C. or less, wherein urea based thickener is an alicyclic urea compound.
A grease sealed bearing for automobile used in a device driven by an automobile engine, in which the grease consists essentially of a base oil containing a synthesized hydrocarbon oil and one or more ester oils at a weigh ratio of 0.1 to 0.49:0.9 to 0.51;
- 5 to 30% by weight of a urea based thickener, and 0.1 to 10% by weight of dithiozinc phosphate based on the whole grease, wherein the synthesized hydrocarbon oil has a kinetic viscosity of 3 to 65 mm2/s at 40° C., and a pour point of −50° C. or less, wherein the ester oil has a kinetic viscosity of 30 to 100 mm2/s at 40° C., and a pour point of −30° C. or less, wherein the urea based thickener is an alicyclic urea compound.
Dependencies are inferred from the claim text.