This slit coupling is manufactured by Reliance Precision Ltd.
The coupling is made from a single piece of aluminum and has two sets of slit cuts allowing for low inertia, no maintenance, and high torsional stiffness when compared to beam couplings.50mm length. It is set screw style and has 8mm x 7mm bores, 16.0mm, Aluminum This Ruland supplied slit coupling is zero-backlash and has a balanced design for reduced vibration at high speeds up to 17,000 RPM.