Types of Couplings

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shaft couplings are use to joined together or couple two shafts belonging or two separate machines or components, each shaft having its bearings, and the two shafts being more or less co axial. coupling must transmit both angular rotation and torque. Shafts are usually available up to 7 meters in length due to inconvenience in transport. To have a greater length, it becomes necessary to join two or more pieces of the shaft utilizing a coupling.

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PURPOSES OF SHAFT COUPLING:

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To provide for the connection of shafts of units those are manufactured 

separately such as a motor and generator and to provide for disconnection 

for repairs or alternations.

To provide for misalignment of the shafts or to introduce mechanical 

flexibility.

To reduce the transmission of shock loads from one shaft to another.

To introduce protection against overloads.

It should have no projecting parts.

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