It is a device that protects the equipment from overloads under abnormal conditions. It operates at the same time as an overload occurs, shutting off the drive and equipment and protecting the machine.

The line-up includes ball-type Shock Guards, in which the ball pops out of the pocket and overruns (trips) when the load rises above a set value, and friction-type Torque Limiters that slips when the load exceeds the friction force.

Unlike shear pins, which break the pin and cut off torque when the load increases and exceeds the strength of the pin, it is a mechanical element that can be automatically reset.

In addition to the above, the line-up includes Torque Keeper and Mini Keeper for slipping clutches and brakes suitable for continuous slipping.

Difference from Shear-pin

In the protection method using shear pins, the load increases and exceeds the strength of the pin, the pin breaks, thus shutting off the torque.

Although it is inexpensive, automatic reset is not possible and pin replacement work is required. The set torque cannot be adjusted.

Tsubaki's mechanical overload protectors can be automatically reset in any method, reducing maintenance manpower.

The torque to shut off the power can be set steplessly, so adjusts can be made according to the equipment.

Parameter Name	Parameter Value
Operation	mechanical
Other characteristics	compact zero-backlash
Torque (Nm)	0.3 - 0.3 150 - 150