Mounting and dismounting

When mounting insert bearings on a shaft, suitable tools should be used and the locking components should be tightened to the torque values / tightening angles listed in the product table. The tightening angles, listed for bearings on an adapter sleeve, are to be used as guideline values only, as it is difficult to establish an exact starting position.
For additional information about mounting and dismounting insert bearings and assembling ball bearing units, refer to the SKF bearing maintenance handbook.
Assembling insert bearings into housings with fitting slots

When mounting an insert bearing into a housing with fitting slots, the bearing should be inserted into the fitting slot in the housing bore (fig. 1) and then swivelled into position. The misalignment of the bearing relative to the housing should not exceed 5°. Eccentric locking collars should be removed from the bearing prior to mounting and reinstalled when the bearing is in position in the housing.

The locking device should face in the same direction as the fitting slots, except for stainless steel and composite housings for the SKF Food Line. Where mounting bearings into these housings, the locking device should face in the opposite direction to the fitting slots.

Make sure that no relubrication hole in the bearing outside diameter coincides with either of the fitting slots in the housing, otherwise grease leakage may result or contamination might enter the bearing (fig. 2).

If the bearing has to be relubricated, make sure the relubrication holes in the outer ring coincide with the relubrication feature in the housing bore. The misalignment of the bearing relative to the housing should not exceed 2°, otherwise relubrication will not be possible (fig. 3).

SKF recommends mounting SKF insert bearings only into SKF housings to avoid a mismatch of components and to enable proper bearing relubrication.

SKF ConCentra insert bearings
When mounting SKF ConCentra insert bearings, position the collar so that one grub screw is directly opposite the slit in the sleeve.


Do not tighten the grub (set) screws until the bearing is positioned on the shaft. If the screws are tightened prematurely, the stepped sleeve may deform. No attempt should be made to remove the sleeve and the mounting collar from the bearing prior to mounting.
To dismount SKF ConCentra insert bearings, loosen the grub screws first. Then gently tap the edge of the sleeve on the collar side or the inner ring side face on the opposite side to loosen the lock (fig. 4).
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