SD Magnet Motors

Bosch Servodyn SD Magnet Motors are permanent-magnet brushless servo motors used with inverter-based drive systems that require electronic commutation for position and speed-controlled motion. The series uses ferrite magnet construction along with a brushless tachometer and integrated commutation sensor, supporting maintenance-free operation, stable synchronization, and consistent torque behavior across the usable speed range. SD motors are available in multiple frame sizes, with rated-speed classes from 1000 to 3000 rpm and standstill torque ratings reaching approximately 48.6 Nm on larger versions. Mechanical options include IEC flange mounting, holding brakes, keyed shafts, second shaft ends, vibration-quality selections, incremental encoder preparation, and versions with an integrated ROD 426 encoder. Built for industrial environments, the motors use a fully sealed housing, insulation class F, winding thermistor protection, and natural-convection cooling, with blower-assisted cooling available on larger motor sizes.