A crane hoist comes out of service after an inspector finds black grease weeping past the coupling guard. The planner orders a replacement "gear coupling" and then discovers the a...

1. Q: Why is the Ball-cage CV coupling called a constant velocity universal coupling?A: The cage keeps the balls on the bisecting plane of the shaft angle. The driving and driven s...

A gear coupling rarely fails with a bang. It fails with a wear step you can feel with a fingernail, a thin film of black paste weeping past a seal, or a sleeve that has started to...

A 15 kW centrifugal pump at a chemical plant was eating jaw-type flexible motor couplings every eight months. The coupling was not the problem. Measurement showed the motor and pu...

A roller press in a cement plant and a 200 W servo axis on a packaging line both get described as a flexible drive shaft coupling. They are not the same component, and treating th...

Three disc packs failed in fourteen months on the same 250 kW compressor, and each time the maintenance crew replaced the coupling. The cause was 0.9 mm of axial growth that nobod...

1. Customer & Equipment Overview The customer is a large heavy-duty building materials enterprise with a 24-hour continuous production line for ore crushing and aggregate conve...

A maintenance supervisor in a steel plate mill recently told us why he keeps three different flexible coupling types in his store: jaw couplings for the pump sets, a drum gear cou...

A complete Rzeppa coupling assembly consists of two end Rzeppa universal joints plus an intermediate drive shaft. Each universal joint contains 4 core transmission components, toge...

A plant engineer once asked why his pump coupling kept damaging disc packs even though the shafts were aligned to within 0.05 mm. The coupling had been selected on torque alone. N...

In mass production and machining of industrial couplings, bulk heat treatment determines the substrate strength and toughness of components, while surface treatment directly contro...

A petrochemical circulating pump train lost a gear coupling every nine months. The root cause was a motor outlet flange sitting 1.2 mm above the pump inlet, a number well within c...