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Drawn cup roller bearings with closed end
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Drawn cup roller bearings with closed end

The needle bushes are similar in structure to needle sleeves. They consist of a needle cage that runs in a deep-drawn outer ring made of hardened steel sheet metal. In contrast to needle sleeves, needle bushes are closed on one side and can absorb low axial forces due to their profiled bottoms. They are very well suited for final bearing at shaft ends. In rotating shaft constructions, they serve to protect against injuries, prevent the leakage of lubricants, and protect the running system from dirt and moisture.

Needle bushes also usually run directly on the shafts, which must act as raceways. As with needle cages and needle sleeves, the running surface must be hardened and ground here as well.

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