Zero-Max E41SC Adjustable Speed Drive With Screw Control

The Zero-Max E41SC Adjustable Speed Drive with Screw Control is a compact mechanical speed drive that varies output speed from a constant input without electronics. A screw-adjusted transmission provides precise speed tuning across a 0–400 RPM range while delivering constant torque (12 in-lbs). With an input power around 1/4 HP (0.19 kW) and typical input speeds up to ~2000 RPM, it operates in a unidirectional fashion and is well-suited for packaging machinery, conveyors, printing equipment, test systems, and automation processes where adjustable output speed is needed without variable frequency drives. Its enclosed, maintenance-light design favors straightforward, manual speed control through the screw adjustment, making it a practical speed drive option when mechanical speed variation with constant torque is required.