Product Description:

The SF-A4.0125.030-14.010 is a brushless servo motor built by Bosch Rexroth Indramat and assigned to the SF Servo Motors series. In automated handling, packaging, or machine tool axes, this motor converts regulated electrical energy from a digital drive into controlled torque and speed needed for precise positional loops. Its electromechanical design supports closed-loop feedback and integrates an electromagnetic brake so the driven load can be held safely when the drive is disabled, which is useful on vertical or indexing axes.

At the core of the motor’s dynamic profile is a rated speed of 3000 rpm, supplied from a drive section that maintains a DC link potential of 670 VDC. The stator winding produces torque in proportion to current with a constant of 1.37 Nm/A, allowing the axis controller to predict output torque accurately during acceleration and speed correction. A flange size of 142 mm matches standard IEC machine interfaces, while the IM B5 mounting style positions the shaft horizontally with a centering pilot. Under continuous duty, the electromagnetic brake can resist a load of 18 Nm, and the combined rotor inertia of 30 × 10⁻⁴ kg·m² supports rapid acceleration without excessive overshoot. Two NTC temperature sensors are embedded in the windings so the drive can derate or shut down if thermal limits are approached during repeated acceleration and braking cycles.

The holding system is energized with a brake current of 0.7 A at a brake voltage of 24 VDC, acting on a friction element whose inertia is 3.1 × 10⁻⁴ kg·m² for responsive engagement. During startup, the motor can tolerate a locked-rotor current of 10.6 A and develop 14.5 Nm of static torque to overcome stiction in coupled mechanisms. Once running, a protection rating of IP67 seals the housing against dust ingress and temporary water immersion, enabling the servo to operate in washdown or coolant-rich cells without auxiliary covers. This sealing helps protect internal components from contamination during routine operation.