A ratchet torque limiter is a device able to interrupt the transmission of power in the event of a orque peak or overload that exceeds the setting. The torque limiter is automatically re-engaged after the cause of the overload is removed. Ratchet torque limiters are generally employed to protect implements subject to constant or alternating torques from overloads. 

Compared to shear bolt torque limiters, its structure is relatively complex. It is typically composed of a circlip, retaining washer, dust guard ring, pushpin kit, hub, pawl kit, housing with yoke, and grease nipple.