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.