Characteristics of needle roller bearings: Needle roller bearings are equipped with thin and long rollers (roller diameter D ≤ 5mm, L / D ≥ 2.5

Roller needle roller bearings consist of one or two ferrules and a needle roller set with cage

The equipment is inspected regularly, the operation check and the bearings that have been removed during the replacement of the peripheral parts are inspected to determine whether it can be reused or used. Carefully investigate and record the removed bearings and appearance.

There are many reasons for the failure of the roller needle bearing. All the factors affecting the design and manufacturing process will be related to the failure of the bearing, and it is difficult to judge by analysis

Under the action of cyclic load, the bearing surface is prone to fatigue failure, that is, cracking and spalling, which is the main damage form of the bearing. Therefore, in order to improve the service life of the bearing, the bearing steel must have a high contact fatigue strength.

In the hydrochloric acid solution, the pickling speed is accelerated as the acid concentration increases and the temperature rises, but since the hydrochloric acid is volatile, the acid concentration and temperature are limited.