Several problems needing attention in installation

Several problems needing attention during installation:

a. The thickness of inner and outer spacer rings must be matched, and the parallelism of two surfaces of spacer rings shall not exceed 0.002mm.

b. Bearings must be optional. The inner diameter difference and outer diameter difference of each group of bearings shall be between 0.002-0.003mm, and a clearance of 0.004-0.008mm with the shell hole and 0.0025-0.005mm with the journal shall be maintained. In actual installation, fit the bearing that can be just pushed in with both hands and thumbs.

c. The roundness of bearing seat hole and journal, the coaxiality at both ends of shell hole and the radial runout of journal shall not exceed 0.003mm.

d. The end face of parts in contact with the end face of bearing ring shall be painted for inspection, and the contact area shall not be less than 80%.

e. Must be installed directionally. That is, align the high point of radial runout of all bearing inner rings with the low point of journal radial runout, and the high point of radial runout of bearing outer rings shall be in a straight line when installed in the housing hole.