Japan Seiko opens a long life bearing washer

Source: China Bearing Network Time: 2014-03-16

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NSK has announced the use of active gearbox (AT) thrust needle roller bearings; it also has a long life number of washers in a strictly smooth environment. It is compact and lightweight together; it is also suitable for smooth oil viscosity drop and smooth environment. A situation that tends to be serious.
In order to improve fuel efficiency, reduce shifting sensation and improve power transmission power; the selection of multi-stage AT is continuously added. Multi-stage AT to reduce mixing resistance; improve transmission power; use more smooth oil with low viscosity; and low viscosity; It is difficult to form an oil film with the gasket. In this way, the roller will slide; a metal touch will occur with the gasket; then the gasket will be damaged quickly. Others; the hybrid vehicle (HEV) is only driven by the motor; the oil pump sometimes does not Work; the thrust needle roller bearings for transmissions are used in the absence of smooth oil; this will also damage the gasket.
NSK chose the self-developed steel "PCR5" to make the gasket; the steel has been reduced in C (carbon) and Si (silicon) content; and the Cr (chromium) content has been added to improve the resistance. PCR5 has excellent punching processability; the thickness exceeds 2. 5mm It can also be stamped. After fully utilizing this feature, the gasket is thicker than the previous product. The thickness is added to make the rigidity progress; the roller and the gasket complete the equal touch; then the life extension can be extended. Further, the PCR5 steel is impregnated with carbon Chemical treatment; improved resistance, appearance hardness and fatigue strength.
The result of the above method; the gasket is subjected to a load of 6400 N (Pmax = 5.0 GPa) at a rotational speed of 1000 rpm; compared with the "SK85" steel which was originally only subjected to general heat treatment instead of carbonitriding treatment; the life span is extended to 3 times. Above. Others are reduced by 20% compared with the original reduction.

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