A tap bolt

Machine screws are

The rolling contact bearings as compared to sliding contact bearings have

When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor and W = Axial compressive load on the spring)

A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because

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