Product Description:

The SF-A4.0172.030-14.015 is a brushless servomotor produced by Bosch Rexroth Indramat for the SF Servo Motors series. It is intended for positioning and velocity control in industrial automation where closed-loop accuracy is required for pick-and-place axes, packaging machinery, and general motion platforms. By combining a permanent-magnet rotor with electronic commutation, the motor delivers repeatable torque without mechanical brushes, reducing maintenance while supporting fast reversals, precise incremental moves, and stable servo response during frequent starts and stops. This makes the unit suitable for automated axes that must repeat short moves with consistent response under changing load conditions.

This model reaches a rated speed of 3000 rpm, and its electromagnetic design gives a torque constant of 1.38 Nm/A, creating a predictable relationship between drive current and mechanical output. During a stall condition, the drive can supply a locked-rotor current of 13 A, and the integrated holding brake provides 18 Nm of holding torque when energized by 24 VDC. Two internal NTC temperature sensors monitor winding heat to protect the stator, while a sinusoidal back-EMF profile and an absolute-value encoder help support smooth torque production, stable low-speed control, and clear position data after power cycles.

The brake operates on a fail-safe principle; spring force clamps the rotor whenever control voltage is removed, and release requires only 0.7 A of coil current. Once released, residual torque is 0 Nm, so the brake does not drag during normal rotation and does not add braking resistance during motion. The power stage that feeds the windings derives energy from a DC-link bus rated at 670 V, allowing rapid torque transients, while the sinusoidal EMF form and absolute feedback support smooth vector control without additional commutation sensors across the operating speed range.