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Whether in the shaft or bearing seat, axial and tangential direction three fixed position. Radial and tangential orientation is achieved through the tight fit of the bearing rings, but the axial position only in a few cases the use of tight fit; general axial spacing parts, such as the end cap and retaining ring to limit the axial position in the context of clearance.
In the rolling bearing selection cooperation should emphatically grasp the following four matters needing attention:
1, rolling bearing fit to enable the bearing installation and disassembly are simple and convenient, time saving, labor saving, as far as possible, spending three points.
2, there is the rings in their mating surfaces cannot along the tangential direction in order to avoid sliding, will cooperate with surface damage.
3, in order to reduce the NTN bearing ring deformation degree, and can give full play to the carrying capacity of the bearing, bearing rings on the best with good support and uniform stress.
4, must adapt to the axial position, a floating ability in a certain range, so the free end bearings must be able to change in length and shaft and the bearing seat hole adapted to NTN.