Product Description:

The SF-A3.0042.030-00.000 is a servo motor built by Bosch Rexroth Indramat for the SF Servo Motors series. As a permanently excited synchronous machine, it delivers controlled torque and speed to axes in automated assembly lines, packaging stations, and pick-and-place cells where repeatable indexing and smooth speed regulation are required. The motor forms the electromechanical link between the drive controller and the mechanical load, converting regulated inverter current into precise shaft rotation for accurate positioning and stable velocity control during production.

At its rated speed of 3000 rpm, the rotor can follow rapid command changes without loss of synchronism. A single-turn absolute STG encoder is integrated to provide immediate position feedback after power-up, which helps the drive establish rotor position without a separate homing cycle. The electromagnetic design has a torque constant of 1.6 Nm/A, relating stator current to output torque in a straightforward way. During startup or unexpected stalls, the winding may draw a locked-rotor current of 2.3 A and produce a locked-rotor torque of 3.7 Nm to overcome static friction. The rotor inertia is 7 × 10⁻⁴ kg·m², which supports short acceleration cycles while limiting abrupt changes in motion. These characteristics are housed in a 223 mm long frame with a Ø19 × 40 mm shaft, and the design does not require separate field wiring.

For integration into high-power machines, the windings interface with a DC link of 670 V, matching the voltage class used by compatible Rexroth converters. Position feedback reaches 8 million increments per revolution, enabling fine interpolation in servo loops and improving low-speed position control. A sealed housing certified to IP67 blocks dust ingress and withstands temporary immersion, which helps in lubricated or washdown areas. The rectangular mounting face measures 116 mm, and the motor mass is 7.0 kg for straightforward installation on machine structures.