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To take full advantage of NSK bearings of carrying capacity, its inner and outer rings must in its whole circumference and are all on the entire width of the Raceway surface support. Support must be solid even, even face can be cylindrical or conical bearing surface, for thrust bearing washers, but plane support. This means that the manufacture of bearing surface must have a sufficient level of precision, its surface there should not be any effect of Groove, holes and other defects. In addition, the bearing rings must be fixed firmly to prevent it when the load in NSK bearing seatings in the rotation.
Generally speaking, only appropriate when mounting bearings inner and outer rings of interference in order to obtain satisfactory radial location and adequate support. Inadequate or incorrect fixed bearing rings typically caused damage of NSK bearings and associated components. However, if easy mounting and dismounting is required, or when non-locating bearing required axial displacement should not use an interference fit. In the case of some loose fit, it is necessary to take special precautionary measures, to limit wear and tear caused by creep. For example, the supporting surface and the abutment surface of shaft hardening, via special lubrication grooves to lubricate mating surfaces, clear the wear particles, or NSK bearing inner ring side face increasing keyway or other fixtures.
When choosing a tie, you should consider various factors discussed in this section, as well as the General selection methods that are available.
Rotation status:
Rotation refers to the movement of the bearing ring relative to the direction of load. There are basically three types of situation: "rotating load", "stationary load" and "direction of load indeterminate".
"Rotating load" applicable state NSK bearings in rotating load is static, or load bearing ring is stationary spin, then in the middle of round, Raceway load at all points of. Non-rotating swing in heavy load, such as load acting on connecting rod bearing, is generally considered rotating load.
Bearing rings under rotating load, if installed with clearance fits, will turn on the NSK bearing seatings (creep or drift), the model, resulting in wear of contact surfaces (fretting corrosion). To prevent this, you must use an interference fit. Amount of interference fit is required will depend on the health.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 230/900CAE4 NSK | 900 | 1280 | 280 |
| 239/900CAE4 NSK | 900 | 1180 | 206 |