Positive clutches - Square and spiral jaw clutch

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Square clutch

The square jaw clutch; that is the simplest form of a positive clutch. Jaw clutch consists of two halves; one of them permanently fastened to the driver shaft. The other half is movable and is attached to the driven shaft. It can freely slide axially on the shaft, but cannot turn due to feather key. They can transmit power in both directions; they are used when it is not necessary to engage or disengage under load.

Spiral jaw clutch

Spiral jaw couplings are made in right or left hand style and will transmit power in only one direction. They can be engaged or disengaged at low speeds. Sprocket attachments are available to function as a chain drive. A shifting lever mechanism is available at additional cost.