Repears

Sheave on mobile dock crane

When we replaced the sheaves on a mobile dock crane, we found bearing damage and realised the cause was that the wrong tolerance had been used for the bearing seat. The bearing itself had broken as a result of the radial and axial forces.
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Our solution? Rather than welding and boring out the bearing, we came up with a more efficient procedure:

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  The damaged bearing seat was machined out to a larger diameter
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  A steel tube was forced into the seat
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  The tube was then machined until the dimensions were exactly right
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  The side of the sheave and the tube were both smoothed until they met the strict specifications of the bearing manufacturer