Product Description:

The SF-A4.0172.030-10.070 is a servo motor manufactured by Bosch Rexroth Indramat and belongs to the SF Servo Motors series. In automated production cells, it works with a drive controller to convert commanded current into rotary motion for accurate axis positioning. By combining permanent-magnet excitation with an integrated feedback encoder, the motor supports closed-loop speed and position control during repeated acceleration and deceleration. This operating profile makes it suitable for packaging, material handling, and assembly equipment that depends on steady motion and repeatable stopping accuracy.

Thermal management relies on natural convection, which removes heat without separate fan hardware and keeps the installation straightforward. The square mounting interface has a flange size of 142 mm, and the ground steel shaft measures Ø24 × 50 mm for use with standardized coupling hubs. At rated operation, the rotor reaches 3000 rpm and produces torque according to a constant of 1.38 Nm/A. During startup or stall conditions, the drive may draw a locked-rotor current of 13 A. Motion feedback is supplied by a single-turn STG encoder with 8 million increments per revolution, which supports smooth low-speed motion and precise interpolated positioning.

The motor’s dynamic behavior is influenced by its rotor-and-encoder inertia of 40 ×10⁻⁴ kg·m², which affects axis response during speed changes and reversals. A locked-rotor torque rating of 18 Nm shows how much static torque the shaft can resist while energized and not turning. The unit weighs 19 kg, so the mounting structure must account for both the motor mass and the forces created during cyclic motion. Overall length without a holding brake is 309 mm, which helps the motor fit into machines where axial space is limited. That length can also simplify placement near guards, couplings, and adjacent machine components.