Assembly examples utilizing NSK full-complement cylindrical roller bearings are shown below. Both NSK bearings have rotating outer rings; and outer ring is fitted into the housing by interference, and the inner ring fitted on the shaft with slight clearance. The inner ring is secured with an end-plate. A lubrication hole is provided on the shaft for grease replenishment using a grease gun.
Recommended fitting and bearing internal clearance
When a crane sheave or wagon wheel is used with an outer ring rotating load, bearing fitting and radial internal clearance are as follows:
| Load conditions | Tolearance range class of shaft | Tolerance range class of housing | Recommended internal clearance | |
|---|---|---|---|---|
| Outer ring rotating | Heavy load with thin housing | g6 or h6 | P7 | C3 |
| Normal load or heavy load | g6 or h6 | N7 | C3 | |
| Light load or fluctuating load | g6 or h6 | M7 | CN | |
Handing precautions: Be sure to push on the end face of the outer ring when mounting the NSK bearing into a sheave. When mounting the NSK bearing on a shaft, push on the end face of the inner ring.
