Ruland PSMR29-8-8-A Shaft Collar With Set Screw

Ruland PSMR29-8-8-A is a four-beam, set-screw shaft coupling designed for 8 mm x 8 mm bores. It has a 28.6 mm outside diameter and 38.1 mm overall length, and is machined from 7075 aluminum from North American bar stock, manufactured in Marlborough, MA. Its two sets of two spiral cuts provide higher torque capacity, lower windup, and zero backlash, with a balanced design that reduces vibration at speeds up to 6,000 RPM; all hardware is metric and the assembly meets RoHS3 and REACH requirements. This coupling is intended for precision motion-control applications requiring a rigid, backlash-free connection between 8 mm bore shafts.