Product Description:

The SF-A3.0042.030-00.056 is a synchronous servo motor manufactured by Bosch Rexroth Indramat as part of the SF Servo Motors series. It serves as a rotary actuator that converts controlled electrical power from a drive into precise mechanical motion for pick-and-place modules, indexing tables, and coordinated multi-axis machinery used in industrial automation. The motor mounts by its face, carries an integrated feedback device, and supplies closed-loop torque and position data back to the drive for deterministic motion control.

The power section is designed for a DC link of 670 V, so standard Rexroth inverters can energize the windings without derating at nominal bus levels. Position feedback is produced by an absolute value encoder that resolves 8 million increments per revolution, enabling very fine positioning. The mechanical interface uses a flange width of 116 mm, and the housing follows the IM B5 construction style, meaning it is secured by its face rather than foot mounts. At standstill, the stator draws 2.3 A and generates 3.7 Nm of locked-rotor torque, values used to size fuses and evaluate breakaway loads. Two NTC temperature sensors in the windings send real-time thermal data to the drive so that overload limits can be enforced.

Bearings are rated for 20,000 h of service, supporting continuous duty cycles in automated cells. The shaft reaches 3000 rpm during normal operation, giving suitable speed for mid-range inertia loads. The stator and encoder assembly withstand shocks up to 6 g, allowing installation on presses, gantries, or transport equipment without loss of calibration. A torque constant of 1.6 Nm/A provides a linear link between commanded current and produced torque, which simplifies current-mode control algorithms and supports accurate feed-forward tuning.