Product Description:

The SF-A5.0250.020-10.000 servo motor is produced by Bosch Rexroth Indramat and belongs to the SF Servo Motors series. In automated machinery, it acts as a closed-loop rotary actuator, converting commanded phase current from a drive controller into accurately regulated shaft motion for positioning, feed, and spindle axes. It is suited for applications that require repeatable motion, stable speed control, and precise response to changing load conditions. The combination of drive control and integrated feedback helps the motor maintain consistent motion during indexing, contouring, and continuous rotation.

With a flange that measures 190 mm, the motor bolts directly to standard machine frames, while its 300 mm body length keeps the assembly compact. The housing carries a protection rating of IP 67, so the internal windings remain sealed against dust and coolant splashes. At a rated mechanical speed of 2000 rpm, the electromagnetic circuit delivers continuous motion, and at standstill the rotor can resist a locked-rotor torque of 23 Nm when 10 A is applied. Feedback is provided by a single-turn absolute STG encoder with 8 million increments per revolution, giving the drive very fine position data. The bearings support an allowable axial load of 380 N, and the motor has a smooth Ø32 × 58 mm shaft for connection to precision clamping hubs.

The kinetic behavior is governed by a rotor inertia of 83 × 10⁻⁴ kg·m², which balances acceleration response with positional stability on medium-mass loads. Overall mass is 24 kg, giving the frame enough thermal capacity to absorb heat between duty cycles. The electromagnetic circuit has a torque constant of 2.3 Nm/A, so the controller can estimate produced torque directly from phase current. Position repeatability holds within ±20 arcsec, and the smooth shaft form helps limit backlash when it is used with shrink-fit or clamp couplings.