After first installing a single rotation of the bearing plate with your hands turn. Check the rotation of the single direction bearings flexibility, without the following anomalies, power run check again.
Bearing transient high temperature can make the surface of the grinding area some depth (10~100nm) were heated to above the workpiece heating tempering temperature. Do not reach under the temperature of austenite, as the heated temperature increases, the surface layer-by-layer corresponds to the heating temperature or high temperature Tempering Tempering microstructure transformation of hardness also declined. Higher heating temperature and decline in hardness and the more powerful.
Most of the high speed bearing temperature at around 200 ° c, and tend to be higher, if not through brute force cooling, the temperature will continue to rise and to the detriment of bearing strength and hardness to, once you lose the ability to maintain the exact shape of the bearing, high speed friction will increase and temperatures were rising rapidly, further lead to reduced material strength and hardness of bearing failure very quickly.
Due to the high speed bearing wear is very sensitive, and prone to debris, if not excluded from bearing in a timely manner, a vicious, rapid failure of the bearing.
High speed bearing lubrication tasks must effectively serve a lubricant moving surfaces of bearing, and carry away the rejected heat from your bearing, while bearing the debris particles or dirt removed.
Roller bearing cages can be divided into cages and cage. Rolling bearing working, heating in the bearings due to sliding friction and wear, especially in the fast-moving conditions, due to the effects of centrifugal force, accelerated wear and heat, cage of will cause serious burns and fractures, causing bearings in normal use. Cage damage occupies a larger proportion in bearing failure. While in the cage in the cause of the damage, retainer material quality is one of the main reasons.
Transient high temperature of the bearing when the grinding zone heating to the workpiece surface temperature of austenite (Ac1) above, the layer of austenitic organization during the subsequent cooling process, and again quenched martensite organizations. Wherever the second workpiece quenching Burns, the secondary hardening layer must be very low hardness under high-temperature tempering.

 


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