OPTI torque is a "balled/roller detent torque limiting clutch", transmitting torque via balls and detents (multiple position reset) or rollers are held in their respective detents through the pressure generated by disc springs. When an overload occurs, exceeding the pre-set torque, the balls or rollers ride out of their detents, disengaging the clutch.

The balls or rollers riding out of their detents produce the axial stroke of the limit switch plate, which is used to actuate a mechanical limit switch to shut down the drive. Alternatively, the OPTI torque can be used without a limit switch plate and a proximity switch sensing the axial movement of the control element.

The limiting torque for an overload is set by adjusting the spring pressure on the balls or rollers. This is done by means of an adjusting nut, which is positively locked once the torque has been set.

As OPTItorque utilizes rolling disengagement, torque changes due to frictional wear, as in friction type torque limiters, are eliminated. Consistent and repeatable torque settings, unaffected by outside influences such as temperature, humidity or lubrication are the result.

Only OPTItorque offers all the following advantages:

• OPTI torque assures precise torque contol. Even in extreme conditions, repetitive accuracies of +/-5% are achieved.

• The OPTI torque system of differing spring weights and configurations results in wide torque ranges for all size units. Low torque applications with large shaft diameters are possible.

• OPTI torque's small size yields low mass moments of inertia.

• OPTItorque offers a unique system for setting the overload torque, making adjustment both easy and accurate.

• OPTI torque features a positive locking arrangement, preventing torque setting changes during operation.

• OPTI torque's large diameter limit switch plate allows the use of commercially available, inexpensive limit switch. Promixity sensors can be used without limit switch plate installed.