Assembly with cotter pins

Principle

The cotter pin has the effect of attachin on component to another, ensuring an accurate relative positioning of the two pieces, or transmitting a movement.
It can also play a safety role by shearing away in the event of a violent surcharge.

Utilisation

Essentially, the pin is subject to shearing, and should therefore be used in cases where there is relatively little torque involved. Its usage is not recommended where frequent removal is necessary. The piercing of the pinholes is generally done after assembling the components in order to assure perfect alignment.

To find out more on the machining dimensions.

The use of a cylindrical cotter pin needs the precise machining of a hole through the shaft and gear. A rough hole is good enough because the pins will adjust by deforming in their seating.

This property gives them a very good resistance to vibration.

This type of assembly is excellent for small-toothed wheels or pulleys, or gears with low modules.

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