Product Description:

The SF-A4.0125.015-14.042 is a servo motor produced by Bosch Rexroth Indramat for the SF Servo Motors series. In automated lines, it acts as the primary rotary axis element, accepting controlled current from a compatible drive and delivering precise position or speed to machine tools, packaging stations, or handling units. A permanent-magnet rotor with an embedded brake supports rapid start, hold, and release cycles typical in indexing tables and gantry systems.

Its nominal operating point reaches 1500 rpm, a speed matched to moderate feed rates without excessive gearbox reduction. The electromagnetic design provides a torque constant of 2.8 Nm/A, so the drive must supply just under three newton-meters for every ampere of phase current. A shared DC bus can deliver up to 670 VDC on the link, enabling short acceleration times; when the shaft is locked, the windings may momentarily draw 5.2 A and resist a locked-rotor torque of 14.5 Nm. To secure vertical loads, the integrated holding brake sustains 18 Nm once energized. The brake circuit is powered from 24 VDC and limited to 0.7 A. Two NTC temperature sensors report winding heat to the controller to help prevent thermal overload.

Mechanical dimensions align the motor with standard B5 bell housings. A mounting flange of 142 mm and an IM B5 footless face arrangement seat the housing against gear stages, while a pilot diameter of 130 mm centers the assembly. The laminated rotor carries 0.0030 kg·m² of inertia, balancing torque capacity with quick reversal. Power conductors are routed through a 4 × 1.5 mm² motor cable, and the brake is wired separately with a 2 × 1.5 mm² pair that terminates in a single 6-pin connector, simplifying installation through one plug. The separate brake pair keeps brake power isolated from the motor conductors.