1. Accurate dimensions: Precision bearings require accurate dimensions as they must be perfectly matched to the geometric shape of the mating machine.
2. Surface quality: The surface quality of the mating parts is critical because the precision bearing must contact the surface of the mating parts when rotating, if the surface quality is poor, it will lead to increased friction, a little friction will wear the load contact surface and shorten the bearing life.
3. Material: The mating machine parts must be made of the same or compatible material as the precision bearing. When selecting mating machine parts, make sure that their material has sufficient strength and wear resistance, otherwise the friction between the bearing and the machine parts will cause wear.
4. Process quality: The mating parts must be manufactured using a suitable process. For precision bearings, the quality objective of the manufacturing process is to produce accurate dimensions, no obvious surface cracks and material uniformity of the machine parts.
5. Temperature: The temperature of the mating parts should be matched to the bearing, as thermal expansion and contraction can affect the performance of the precision bearing, and the effects of temperature variations can be minimised by the choice of mating parts.