What bearing the motor chooses must be related to the motor characteristics and actual operating conditions! 

Motor products are machines that convert electric energy into mechanical energy. The most directly related ones include the selection of motor bearings. The load capacity of the bearings must match the power and torque of the motor, and the size of the bearings is consistent with the physical space of the associated parts of the motor.

The size of bearing load is usually one of the main determinants of bearing size. Roller bearings generally have higher capacity than rolling bearings of similar sizes; The full roller bearing can bear heavier load than the corresponding bearing with cage. Rolling bearings are mostly used for medium or small load; Under the working conditions of heavy load and large shaft diameter, the selection of roller bearing is relatively safe and reliable.

The most important considerations when selecting standard bearing types mainly include accommodation space, load, misalignment, accuracy, speed, noise, stiffness, axial displacement, installation and disassembly, embedded seal, load size and direction, etc.

Nu type and n-type cylindrical roller bearings commonly used in small and medium-sized motor products can only bear pure radial load; In addition to radial load, deep groove ball bearing can also bear certain axial load, that is, combined load.

Important considerations in bearing configuration design also include load capacity and rated life, friction, allowable speed, internal clearance or preload of bearing, lubrication and sealing, etc. The shaft with smaller diameter can be used with most ball bearings. The most commonly used is deep groove ball bearing; And needle roller bearings. For the shaft with larger diameter, cylindrical roller, tapered roller, spherical roller and deep groove ball bearing can be selected. When the radial space is limited, the bearing with smaller cross section shall be selected.