Socket and spigot Cotter joint for 20mm dia shaft
grabcad
A cotter is a rectangular cross section of uniform thickness and varying width with one of its longer sides tapered and other longer side being straight. The slots in the spigot rod and in socket are made slightly larger then the cotter with one side straight and the other side tapered. The taper on one of the sides of cotter facilitates holding of the two rods. Excessive taper must be avoided. For general use, a taper of 1:30 is recommended. When the taper is greater than 1:30, to prevent slipping back of the cotter, it should be locked in position by some additional means of locking arrangement.
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