Torque limiter, 20 - 42 bore, 90 - 430 Nm, Fenner.

The torque limiter is a protective device that limits the torque transmitted in a drive system by slipping when the torque demand exceeds a preset value as a result of shock loads, overloads or machine jams. It automatically re-engages when the overload is removed. No resetting is required with limiters preventing machine damage and eliminate costly downtime. They utilize spring loaded friction surfaces for their operation and slip torque is preset by adjustment of the spring force using the adjustment nuts and bolts. Torque limiters can be used with sprockets, gears, sheaves or flange plates as the centre member clamped between two friction facings. The ratings are realistic and consistent with optimum spring loads and face pressures that permit longer slip time, maintain re-engagement at preset torque and provide long lasting protection.