R+W (Bensenville, IL) has again expanded its line of ST series safety couplings, with a specially designed version now available for the protection of extruding equipment. Taking advantage of the well-proven ball-detent safety element system, the driving and driven ends separate within milliseconds of a torque overload, protecting the extruder from damage and reducing expensive repairs and costly downtimes. According to the company, the driveline is free to coast to a stop after disengagement, and re-engagement simply requires that a force be applied to the back sides of the plunger modules, either with a soft hammer or pry bar. A wide variety of disengagement torque values are available through a selection of adjustment ranges. Other design features include:
- An integrated elastomer-jaw set, absorbing vibration and shock, as well as allowing for compensation for axial, angular, and parallel shaft misalignment.
- Lateral mounting by means of the fully split clamping hubs, which simplifies the installation process and eliminates the need to move heavy motors and gearboxes during installation or removal.