Superior Electric SS400 Stepper Motor

The Superior Electric SS400 SLO-SYN two-phase hybrid stepper motor is a precision-positioning drive designed for 120 VAC input at 50/60 Hz, delivering 72 RPM with a torque rating of 400 oz-in (approximately 25 in-lb or 2.83 Nm). In catalog listings it appears as SS400BU, and its overall length is about 6.61 inches, reflecting a compact, high-torque form factor from the SLO-SYN family. Built under the Superior Electric brand (a Danaher Motion lineage), the SS400/SS400BU is used in automation and equipment where incremental motion and repeatable positioning matter, matching legacy 120 V power standards common in older tooling and control systems. Some distributor entries reference a variant current rating (for example, BM101024), indicating available options that preserve the 72 RPM/120 V, 50/60 Hz operating profile while tailoring drive current to different drives.