Product Description:

The SF-A4.0172.030-10.071 is a brushless servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. As a rotary actuator, it converts drive current into controlled torque and shaft motion for automation axes that require precise speed regulation and repeatable positioning. The motor integrates a single-turn absolute encoder, so the control system can read a valid shaft position immediately after power-up and begin closed-loop operation without an initial search move. This makes the unit suitable for packaging lines, gantry drives, and other cyclic machinery where repeatable restarts are important after short power interruptions.

The motor reaches a rated speed of 3000 rpm, which supports continuous operation within the permitted winding temperature range. A torque constant of 1.38 Nm/A links motor current to produced shaft torque, making drive matching more direct. The 142 mm square flange uses the IEC B5 pattern for direct attachment to machine frames or gearboxes. A sealed IP67 housing blocks dust and resists brief water immersion. Motion response depends in part on a rotor inertia of 40 × 10⁻⁴ kg·m², which helps balance acceleration with running stability. The motor uses IM B5 mounting, has a body length of 309 mm, and has a smooth 24 × 50 mm shaft for clamp-style couplings.

The motor can accept a locked-rotor current of 13 A, producing a stall torque of 18 Nm when the shaft is not turning. This supports static load breakaway and low-speed alignment tasks before the axis reaches normal rotation. Position feedback is provided by an absolute encoder with 8 million increments per revolution, and its ±20 angular-second tolerance supports fine positioning at low speed. With a mass of 19 kg, the motor needs a rigid mounting surface so the flange and shaft remain aligned under repeated reversing loads.