A replacement bearing can destroy a repaired motor within weeks without a single flaw in its material or lubrication. The cause is usually invisible: the tolerance class was different. A standard-class bearing and a precision-class bearing of the sa...
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A shaft that measures 40.000 mm and a bearing bore specified at 40.000 mm may appear to be a perfect match, but appearances are misleading. If you slide them together by hand, the assembly can run for a while. Under real load, however, that small cl...
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An electric motor-driven conveyor kept losing its bearings every three months. The maintenance team changed grease, seals, and even shaft alignment, but the failures continued. The real problem appeared only after the design engineer measured the fo...
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A maintenance planner sees two 6205-2RS bearings of the same size; one is marked ABEC 5 and one is marked ABEC 7. The price difference is enough to buy several spare bearings. The correct reaction is not to assume the ABEC 7 part is automatically be...
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