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Deep Groove Ball Bearings with Filling Slots

Deep Groove Ball Bearings with Filling Slots

Single row deep groove ball bearings with filling slots have a filling slot in both the inner and outer ring enabling more and larger balls to be incorporated than in standard deep groove ball bearings.

Filling slot bearings have a higher radial load carrying capacity than bearings without filling slots, but their axial load carrying capacity is small. They are also unable to operate at such high speeds as bearings without filling slots. Depending on the main application for which they are used, deep groove ball bearings with filling slots have a cage or no cage.

Cage

 

No Cage

The smaller sizes, which are mainly used for automotive gearboxes and are identified by a standard designation, incorporate a cage. The standard assortment of these bearings comprises

  • basic design open bearings
  • shielded bearings
  • bearings with a snap ring groove.
The large-size bearings which are designed for heavily loaded, slowly rotating applications are without cage.

Supplementary designations

The designation suffixes that occur most frequently with deep groove ball bearings with filling slots are listed below with their definitions.

DesignationDefinition
C3Radial internal clearance greater than Normal
NSnap ring groove in the outer ring
NRSnap ring groove in the outer ring, with appropriate snap ring
ZShield of pressed sheet steel on one side of the bearing
2ZZ shield on both sides of the bearing
ZNRShield of pressed sheet steel on one side of the bearing and snap ring groove in the outer ring with snap ring on the opposite side of the shield
2ZNRZ shield on both sides of the bearing and snap ring groove in the outer ring with snap ring