64results about How to "Improve friction characteristics" patented technology

Disclosed is a worm wheel of a reducer of an electric power steering apparatus which is manufactured by integrally injection-molding a hub, a boss, and a gear forming part, thereby making it possible to increase a forming performance of the worm wheel and reduce an amount of material, and increasing a mechanical durability and frictional characteristics of the worm wheel to allow the reducer to be stably used for a long time, and a method for manufacturing the same.

A grease composition is disclosed, wherein a metallic soap-base thickener containing a long-fiber material having a major axis part length of at least 3 mum is blended with a base oil obtained by mixing a lubricating oil having a polar group within the molecule structure and a non-polar lubricating oil, which can improve the initial sound (cage sound) of bearing at the starting of operation in a low-temperature environment and is effective on the reduction of fretting damage (abrasion) or torque, and also a rolling bearing and a linear acting apparatus each obtained by packing the grease composition are disclosed, which exhibit excellent low-temperature acoustic property and are reduced in the fretting damage (abrasion) or torque.

Provided is a lubricating oil composition for a continuously variable transmission, said composition exhibiting a low viscosity whilst maintaining the viscosity required of the lubricating oil composition throughout a period of use in a mechanism, and maintaining a high friction coefficient between metals so as to ensure a high power-transmitting force provide the wet clutch friction characteristics and the shudder prevention properties required in a transmission. The composition also achieves improved fuel economy due to a low traction coefficient. In the composition, (B) a phosphorus compound, (C) a calcium salicylate and / or a calcium sulfonate, (D) a boron-modified ashless dispersant, and (E) a friction regulating agent are included, each at a specified amount, in a base-oil that has been adjusted so that the product (ECxV40) of the mass percent (EC(mass%)) of a saturated cyclic component, as based on the total base-oil mass, and the kinematic viscosity (V40(mm2 / s)) at 40 DEG is equal to or less than 500, and the kinetic viscosity at 100 DEG is 3.6-4.1mm2 / s. The lubricating oil composition has a kinematic viscosity at 100 DEG of 5.2-5.6mm2 / s and a viscosity index of equal to or greater than 165.

The present invention provides a lubricant or the like. The lubricant uses an ionic liquid which is free from fluorine and has excellent friction characteristics. A lubricant contains an ionic liquidhaving cations and anions, wherein the cations are represented by the following formula (A) and do not have fluorine atoms, and the anions are represented by the following formula (X), and do not havefluorine atoms.

The present invention provides a lubricating oil composition for two-wheeled vehicles, which is able to not only suppress a lowering of fatigue life of engine parts while making fuel saving properties (in particular, fuel saving properties at the time of low speed) favorable but also make clutch friction characteristics of two-wheeled vehicles favorable. The present invention is concerned with a lubricating oil composition for two-wheeled vehicles, including a base oil (A) having a viscosity index of 120 or more, an ethylene-propylene copolymer (B), and a metal-based detergent (C), wherein the content of the ethylene-propylene copolymer (B) is 0.30% by mass or more on the basis of the whole amount of the lubricating oil composition; the metal-based detergent (C) contains a calcium phenate (C1) and a calcium sulfonate (C2), and a mass ratio of the content (Ca1) of the calcium phenate (C1) as expressed in terms of a calcium atom to the content (Ca2) of the calcium sulfonate (C2) as expressed in terms of a calcium atom is satisfied with a relation of (1.0≤Ca1 / Ca2); and the lubricating oil composition has a kinematic viscosity at 100° C. is less than 9.3 mm2 / s and an HTHS viscosity at 150° C. is 2.9 mPa·s or more.

Provided are a peeling member that can suppress the phenomenon of peeling sheet creasing, can have sufficient linear contact with a roller, can prevent deformation by jamming of paper, and can exhibitsuperior paper peeling performance, and a peeling device provided with this peeling member. The peeling member, which has a peeling sheet (10) for peeling paper from an electrophotographic device fuser roller (6), is formed from one metal plate and has a peeling part (2) constituting a tip part and a support part (3) that is thicker than the peeling part (2). The peeling part (2) is provided on one long side of the metal plate, a paper passing surface (2b) thereof is a flat surface continuous with the surface of the support part (3), and the side opposite from the paper passing surface is aninclined surface (2c) inclined with respect to the paper passing surface (2b) such that the thickness of the peeling part (2) increases from the very tip (2a) of the peeling part (2) toward a boundarypart (2d) with the support part (3). The inclined surface (2c) is the surface disposed on the fuser roller (6) side, and distance (D1) between the very tip (2a) and the roller and distance (D2 from the boundary part (2d) and the roller satisfy D1<=D2<=5*D1.