GREASE COMPOSITION AND ROLLING DEVICE

Provided are a grease composition and a rolling device which can prevent a decrease in seal performance even when a low-viscosity base oil having, for example, a kinematic viscosity of 5 to 40 mm2/s is used, and can achieve both seal performance and low torque. A seal member (12a) has a plurality of...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMOTO, Tomoaki, ASHIDA, Haruhisa, ITO, Azuma
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BEARINGS BLASTING CHEMISTRY CYLINDERS ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS FUELS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS LIGHTING LUBRICANTS LUBRICATING COMPOSITIONS MECHANICAL ENGINEERING METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES PISTONS ROTARY BODIES OTHER THAN GEARING ELEMENTS SEALINGS SHAFTS TECHNICAL GASES CONTAINING CARBON MONOXIDE THERMAL INSULATION IN GENERAL USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION WEAPONS
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Beschreibung
Zusammenfassung:	Provided are a grease composition and a rolling device which can prevent a decrease in seal performance even when a low-viscosity base oil having, for example, a kinematic viscosity of 5 to 40 mm2/s is used, and can achieve both seal performance and low torque. A seal member (12a) has a plurality of seal lips (114), (115), and (116) made of an elastic material, and a grease composition is sealed in gap portions (121) and (122) between a sliding surface of a slinger (106) on which the seal lips slide and the two adjacent seal lips. The grease composition contains a base oil and a polar polymer, and a weight-average molecular weight of the polar polymer is from 5000 to 140000.