Product Description:

The SF-A3.0042.030-04.000 is manufactured by Bosch Rexroth Indramat as part of the SF Servo Motors series. This motor couples to planetary gearboxes or belt drives and interfaces with Indramat inverters to position loads with closed-loop precision in high-throughput industrial automation. It is suitable for indexing tables, pick-and-place axes, and other motion systems that require repeatable positioning. The motor layout supports closed-loop control with fast response during frequent start-stop cycles. Its form factor also works well where compact drive components must share limited machine space.

During continuous operation, the rotor can maintain 3000 rpm. This rated speed supports fast cycling without thermal derating. The magnetic design produces 1 Nm of torque for every 0.62 A of phase current, which is reflected in its torque constant of 1.6 Nm/A. Position feedback is provided by a single-turn absolute encoder with 8 million increments per revolution, enabling very fine interpolation during motion control. The connected drive must supply a DC link of 670 V for full voltage utilization. Mechanical integration is aided by a square IEC flange that measures 116 mm across, which helps align the housing to standard mounting patterns.

The electromechanical brake delivers a static holding torque of 10.0 Nm, so vertical or suspended axes remain fixed when the inverter is disabled. Service voltage for the brake is 24 VDC, and its coil draw of 0.66 A allows it to operate from common control power supplies. Long-term reliability is supported by bearing grease life of 20,000 hours, which helps reduce planned maintenance intervals. With a reflected inertia of 7 × 10⁻⁴ kg·m² and an additional brake inertia of 1.06 × 10⁻⁴ kg·m², the motor is suited to moderate load mismatch while still responding quickly from a locked-rotor state where it withstands 3.7 Nm of startup torque. This balance supports steady acceleration in axes with moderate reflected loads, and the brake adds holding force at standstill without affecting normal powered motion.