Product Description:

The SF-B5.0460.020-10.015 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. As a precise rotary actuator for industrial automation, the unit converts commanded current from a drive into proportional torque and position for closed-loop motion in assembly cells, packaging lines, and machine tools. It uses permanent magnets and electronic commutation to maintain constant torque across the operating range while eliminating brush maintenance.

The stator windings connect to a DC bus of 670 V, allowing the motor to pair with compatible Rexroth inverters that share this intermediate circuit. At that supply level, it reaches a continuous speed limit of 2000 rpm, which suits medium-inertia axes that require smooth velocity regulation. Torque scales with phase current at 2.2 Nm/A, which simplifies feed-forward calculations in the controller. When the shaft is prevented from turning, the motor can resist external load with 46 Nm of locked-rotor torque. The back-electromotive-force waveform is sinusoidal, so the stator current sequence can be synchronized with the rotor field to minimize cogging, and two integrated NTC probes monitor winding temperature for thermal foldback.

Installation uses an IM B5 flange layout, allowing rigid fastening to a gearbox or baseplate without feet. All power and encoder leads exit through a single plug-in connector, which helps limit wiring errors during service. The lightweight aluminum housing spreads heat quickly, which benefits dynamic gantry heads that accelerate frequently. During a stalled start, the winding draws 21 A, a condition that the drive must manage with current limiting. An absolute-value encoder delivers single-turn position data immediately after power-up, which can reduce homing time on startup.