摘要:
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.
摘要:
The sliding bearing has a metallic outer ring and a self-lubricating liner formed on the inner circumferential surface of the outer ring. The self-lubricating liner has a self-lubricating resin composition consisting of a mixture of 60 to 80% by weight of polyetherketone-based resin, 10 to 30% by weight of polytetrafluoroethylene, 5 to 15% by weight of carbon fiber and not more than 15% by weight of aramid fiber, total amount of the carbon fiber and the aramid fiber being 10 to 25% by weight. The inner circumferential surface of the outer ring has a surface roughness in terms of center line average roughness not less than Ra 4.0 μm and a surface roughness in terms of maximum height not less than Rmax 30.0 μm; and the outer ring and the self-lubricating liner are unified. A method of producing the bearing is also provided.
摘要:
A bearing for an electronically controlled throttle motor in an automobile filled with a grease composition with a kinetic viscosity between 40 and 150 mm2/sec (at 40° C.) containing (a) a straight-chain perfluoropolyether oil with a kinetic viscosity less than 25 mm2/sec (at 40° C.) expressed by the formula RfO(CF2O)p(C2F4O)q(C3F6O)rRf (where Rf is a perfluoro lower alkyl group, and p, q and r are integers whose total is between 25 and 45), (b) a base oil containing a straight-chain perfluoropolyether oil with a kinetic viscosity greater than 250 mm2/sec (at 40° C.) expressed by the formula RfO(CF2O)p(C2F4O)q(C3F6O)rRf (where Rf is a perfluoro lower alkyl group, and p, q and r are integers whose total is between 80 and 200) and (c) a polytetrafluoroethylene filler.
摘要翻译:一种汽车中的电子控制节气门马达的轴承,其装有运动粘度为40至150mm 2 / sec(40℃)的润滑脂组合物,其含有(a)直链 全氟聚醚油,其动力粘度小于25mm 2 /秒(40℃),由式RfO(CF 2 O)O表示, (C 3 F 4 O)q(C 3 F 6)(C 3) (其中Rf是全氟低级烷基,p,q和r是总计在25和45之间的整数),(b)含有直链全氟聚醚的基础油 由式RfO(CF 2 O)表示的运动粘度大于250mm 2 / sec(40℃)的油 sub> (C 2 H 4)O(CH 3)3 C(C 3 H 6) )Rf(其中Rf是全氟低级烷基,p,q和r是总数在80和200之间的整数)和(c)聚四氟乙烯填料。
摘要:
The invention provides a stud for a shoe which is light in weight, has a long service life and excellent abrasion resistance, and a shoe using the same. The stud for the shoe is made up of a central protruding member, a seating plate, and peripheral binding members. The seating plate is formed of a metallic material, and the central protruding member or the peripheral binding members are formed of RB ceramic or CRB ceramic. The shoe is fabricated by securely attaching the studs to an outsole thereof.
摘要:
There is provided an air cleaning filter capable of molding into free shapes in which an RB ceramics and/or CRB ceramics of 10 to 2,000 angstrom in pore diameter and 0.1 to 1.1 cm8/g in pore volume is used as an absorbing and filtering material.
摘要:
There is provided a polishing compound for sheet metal coating comprising an polishing material and a surfactant in which a RB ceramics and/or CRB ceramics powder is used at least as a part of the polishing material, thereby shortening a stain removing process of a coated surface in reparative sheet metal coating work of cars, etc. without conducting a washing process thereafter.
摘要:
There is provided a porous material suitable for use in a bearing retainer, having such properties as a small contraction ratio of the dimensions of a formed workpiece to those of a finished product, excellent hot oil resistance, small contraction change, insusceptibility to damage, light weight, a long service life, and ability to retain oil and grease for a long period of time. The porous material suitable for use in the bearing retainer is obtained by a process comprising the steps of mixing degreased bran derived from rice bran with a thermosetting resin before kneading, subjecting a kneaded mixture to a primary firing in an inert gas at a temperature in a range of 700 to 1000° C., pulverizing the kneaded mixture after fired into carbonized powders sieved through a 60-mesh screen, mixing the carbonized powders with a thermosetting resin before kneading, pressure-forming a kneaded mixture thus obtained at a pressure in a range of 20 to 30 MPa, and applying a heat treatment again to a formed kneaded mixture in the inert gas at a temperature in a range of 100 to 1100° C.
摘要:
A bearing for high efficiency electric motor with which low torque property, low noise property and low volatilization property can be maintained, is provided. The bearing for electric motor is sealed with a grease composition comprising: (A) an alkali metal salts and/or an alkaline earth metal salt synthesized from a hydroxide of an alkali metal or an alkaline earth metal, and a higher fatty acid having 10 or more carbon atoms or a higher hydroxyfatty acid having at least one hydroxyl group and 10 or more carbon atoms; (B) a carbonate compound represented by the general formula: (R and R′ represent a branched alkyl group having 13-15 carbon atoms, and may be same or different); and (C) at least one kind of an ester-based synthetic oil selected from the group consisting of a diester-based synthetic oil represented by the general formula (i): ROCO (CH2)nCOOR′ (i) (R and R′ represent an alkyl group having 3-18 carbon atoms, and may be the same or different, and n is 3-12); a triester-based synthetic oil represented by the general formula (ii): C2H5C (CH2OCOR)3 (ii) (R represents an alkyl group having 3-10 carbon atoms); a tetraester-based synthetic oil represented by the following general formula (iii): C(CH2OCOR)4 (iii) (R represents an alkyl group having 3-10 carbon atoms), and other neopentyl polyol ester-based synthetic oil.
摘要:
A grease composition for a pivot assembly bearing is provided and includes a thickener of 5 to 25% by mass and a base oil of 95 to 75% by mass with respect to the total mass of the thickener and the base oil. Two or more ureas selected from: urea A: a urea comprising diurea compounds having an aliphatic (ALA)/alicyclic (ACA) substituent; urea B: a urea comprising diurea compounds having an alicyclic (ACA)/aromatic (ARA) substituent; and urea C: a urea comprising diurea compounds having an aromatic (ARA)/aliphatic (ALA) substituent are used as the thickener. A poly α-olefin mixture having a kinematic viscosity at 40° C. of 40 to 70 mm2/s prepared by mixing poly α-olefin (PAO HV) having a kinematic viscosity at 40° C. of 350 to 450 mm2/s with poly α-olefin (PAO LV) having a kinematic viscosity at 40° C. of 25 to 40 mm2/s in a mass ratio of 15:85 to 30:70 is used as a base oil. A lead free additive may be used as an additive.
摘要:
A heat-resistant noise-reduction grease and a bearing containing the grease for a small motor such as a motor for imaging equipment such as a blower fan and motor bearing for a household electrical appliance such as an air conditioner, which is eco-friendly and excellent in noise-reduction properties is provided.The heat-resistant lithium grease composition is composed of 5 to 20% by weight of a thickener and 95 to 80% by weight of a base oil, wherein long-chain fatty acid lithium soap with 26 to 32 carbon atoms and lithium soap comprising a higher fatty acid with 10 to 20 carbon atoms and/or a higher hydroxyfatty acid with one or more hydroxyl groups and 10 or more carbon atoms are used as the thickener, and the base oil contains, as a main component, polymer ester oil (A) in which 8 or more ester groups are arranged in comb tooth form on one side of chain molecules of oil constituted with 8 or more carbon atoms, which is expressed by the following general formula: (where each of R1, R2, R3 and R4 represents an alkyl group, x represents an integer satisfying x≧2, and y represents an integer satisfying y≧2). and the base oil has a viscosity (40° C.) of 30 to 100 mm2/s.