Composite Disc shaft couplings from Zero-Max combine high-performance materials with the design and precision to withstand tough servomotor environments. Precision machined of ASTM A108 steel and 6061-T6 aluminum, the body components are inherently balanced. Functioning components are made from precisely oriented and layered composite material. To ensure precise alignment of assembled components, ISO Class 12.9 hardened shoulder bolts are used. The couplings provide high dynamic load capacity and high torsional stiffness for reliable operation. Features include zero backlash, good ability for reversing loads, smooth operation at high speeds, and compact size with a clamping design that fits most applications.