Zero-Max SC040 ServoClass Single Shaft Coupling

Zero-Max SC040 ServoClass Single Flex Coupling is a precision shaft coupling designed for servo-driven systems, delivering zero-backlash torque transmission and high concentricity. The aluminum hubs with a stainless steel disc provide a compact, torsionally stiff connection that tolerates angular misalignment while preserving rapid, repeatable motion, thanks to a single-flex configuration. Specifications include a torque capacity of ~106 in-lbs (12 Nm) and a maximum speed of up to 10,000 RPM, with bore options from 0.3125" to 0.9375" (8–24 mm) and misalignment allowances of angular ~1°, parallel ~0.009 in (0.24 mm), and axial ~0.024 in (0.60 mm). The assembly measures approximately 44 mm outside diameter (1.73") and 48 mm overall length (1.89"), and it offers a torsional stiffness of ~1,545 in-lbs/deg. This shaft coupling is commonly used in servo motors, CNC machinery, robotics, packaging equipment, and automated production systems, where precise motion transfer and minimal vibration are critical in motor-to-load connections and where the unit is factory-assembled to tight tolerances to maintain concentricity and performance.