Product Description:

The SF-A4.0125.030-14.029 is a permanent-magnet servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. It is intended for CNC axes, handling modules, and other automation stages where precise torque and speed regulation are required. By supplying sinusoidal current from a Rexroth drive, the motor delivers closed-loop rotational motion that can be synchronized with linear actuators, grippers, or spindle equipment. This supports repeatable positioning and rapid cycle execution in modern assembly and packaging machinery.

At its rated operating point, the rotor reaches 3000 rpm, a speed that balances response time with mechanical stress for medium-duty servo axes. The electromagnetic conversion factor is 1.37 Nm/A, so each ampere of phase current produces predictable torque for tightly tuned current loops. During startup, the motor can develop a locked-rotor torque of 14.5 Nm while drawing a peak of 10.6 A, which helps establish the requirements for the associated drive amplifier and supply wiring. The holding brake circuit is energized with 24 V and draws 0.7 A, while its friction pair adds 3.1 × 10⁻⁴ kg·m² of brake inertia, which can slightly increase stopping time when the brake is applied.

The mechanical envelope supports application forces that act along the shaft, and an axial load of up to 154 N can be transmitted without exceeding bearing limits. When the brake is engaged, it resists motion with 18 Nm of static torque, allowing vertical or overhung loads to remain in position after power is removed. Dynamic behavior is influenced by the rotor inertia, the overall mass of 17.7 kg, and the compact 24 × 50 mm shaft, all positioned behind a 142 mm square flange. Total length including the brake is 324 mm, which provides a consistent footprint for modular machine frames.