Mechanical Overload Protector:
The new backlash-free Overload Protection with Torque Limiters

Torque Limiter made of special steel, even completely sealed

For applications in the food area it is mostly required to oftect the coupling against aggressive cleaning detergents, liquid media, or dirt. Sealed couplings are also used in cleanroom technology and in very dusty applications. A complete sealing that is optionally offered by R+W avoids leaking grease and at the same time penetration of coupling damaging substances. This solution ofvides all the sealing elements integrated in one component. An O-ring is inserted in the base element of the coupling and covered by an extended Actuation ring. This system makes sure that the external dimensions of the coupling stay the same.  Costly solutions where the coupling was sealed with a housing are therefore unnecessary

Nitrocarburizing, oxidizing, or nickel-plating is possible for steel types. Aluminum can be anodized, other materials and surfaces can be offered on request.

Function of the patented R+W prinziple

R+W's patented operational principle guarantees reliable and safe protection against overload even with heavy loads. Due to the spring loaded ball detent design of the coupling high repeating accuracy of the preset disengagement torque is reached and continuous operation is ensured when using a ball detent design Torque Limiter vs. a slip clutch.

Overload protection does not allow any comofmises in regard to reliability and quality of the individual components although Torque Limiters are always designed for an economic use. R+W conceived a solution which stands out.

Torque limiting Clutches function always assured

At the factory the Torque Limiters are adjusted to the exact disengagement torque requested by the customer. After installation the disengagement value can easily be changed to siut actual requirements.

The torque adjustment range is engraved on the adjustment nut. An outstanding feature opf the R+W design is an easy radial adjustment which clearly facilitates adjustment of the coupling. Due to the positive stop on the adjustment nut, disengagement of the coupling is allways assured.

For each Safety Coupling / Torque Limiter model there are four different function systems available:
single position = attempting re-engagement automatically in the same position (360°)
multi-position = attempting re-engagement in several positions per revolution
full disengagement = complete load separation, must be re-engaged manually
load holding  = no disengagement occurs but an external sensor can be instantly triggered

With these four function systems R+W offers a solution for every application.

Torque Limiter: Conclusion

Most importantly in mass production situations, machine down time causes high loss of Production which inevitably results in rising unit costs. When using a Torque Limiter, which separates driving force and driven force in milliseconds and is thus fully operable after a very short period of time, consequential damages will be minimized. The price of the coupling can be considered as being relatively very low when compared to the cost of down time.

If you wish to receive more information on this Product please do not hesitate to contact R+W at phone: 001-888-479-8728 or via email at info@rw-america.com