Product Description:

The SF-A2.0020.030-14.000 is a servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. It supplies rotational power for position-controlled axes in automation cells, combining torque production with integrated absolute feedback for accurate motion control. The model uses permanent-magnet excitation with electronic commutation, so precise shaft position is available immediately after power-up for tightly synchronized multi-axis equipment. It is suited to applications that require repeatable starts, stops, and coordinated axis movement.

At the motor’s non-drive end, a holding brake is energized with 24 VDC and draws 0.56 A. It can deliver 3.2 Nm of static torque at 120 °C, allowing the axis to remain fixed when power is removed. The motor must be paired with an inverter that supplies 670 V on the DC bus for full speed range without field weakening. Digital feedback is provided by a single-turn absolute encoder that resolves 8 million increments per revolution, while its mechanical alignment error stays within ±20 angular seconds. The brake’s polar moment of 0.4 × 10⁻⁴ kg·m² adds only a small amount to total inertia, so axis response remains quick during speed changes.

When motion is commanded, the rotor, which has a mass moment of 3 × 10⁻⁴ kg·m², can reach a rated speed of 3000 rpm. If the shaft is prevented from turning, the winding draws a locked-rotor current of 1.3 A and develops 2.0 Nm until thermal limits intervene. Continuous torque generation follows a motor constant of 1.5 Nm/A, allowing the drive controller to calculate current targets directly from load demand. That relationship helps the controller balance rapid acceleration with sustained load periods. The housing is sealed to IP67 except at the output face, and the Ø14 × 30 mm keyed shaft transmits torque to couplings or gearheads without additional adapters.