The manipulation system is generally used a mechanical linkage operating mechanism, construction machinery working conditions are complex and harsh, high frequency, high-intensity construction is straightforward to induce its manipulation system failure, which needle bearing failure is the most frequent, and gradually becomes the weak link of the machine. Needle roller bearing failure is mainly manifested as abnormal needle roller wear. This causes the noise to become large, and may even lead to the abnormally heavy operation or no big action.
However, graphite self-lubricating bearings use metal base material and solid lubricant composite, it uses 2 kinds of materials to complement each other’s performance, can be in heavy load, high temperature, not easy to form lubricating oil film or oil film failure conditions, to achieve oil-free self-lubrication, to slow down the wear and improve the life of the purpose.
In the grinding process, the metal substrate bears most of the load. By friction, the solid lubricant in the hole is transferred to the friction surface, and a well-lubricated, firmly attached, uniformly covered solid transfer film is formed on the friction surface, thus reducing the effect of friction.