Product Description:

The SF-A4.0125.030-04.030 is a servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. As an electromechanical drive component, it converts drive current into controlled rotation for automated packaging stations, pick-and-place gantries, and other positioning axes in industrial automation. The unit couples directly to gear stages or belt systems, so closed-loop commands from the machine controller can execute precise starts, stops, and position changes during repetitive machine cycles.

In continuous operation, the motor reaches a rated speed of 3000 rpm, and each ampere of phase current produces approximately 1.37 Nm/A of electromagnetic torque. A rotor inertia of 30 × 10⁻⁴ kg·m² moderates acceleration and deceleration behavior, while a locked-rotor current of 10.6 A supports startup load demands. The centering pilot is machined to 130 mm, and the square mounting flange measures 142 mm across, so the frame aligns with standard gearbox and machine plates. Feedback is delivered by an optical incremental encoder with 8 million incr./rev., which supports very fine position tracking during controlled motion. The 24 mm shaft extends 50 mm beyond the bearing stack and uses a feather key A8×7×40 for torque transmission. Overall housing length is 324 mm, which helps the motor fit medium-depth machine layouts without sacrificing mounting stability.

For holding and emergency stop situations, the built-in brake supplies 18 Nm of static torque. It is energized by 24 VDC and draws only 0.7 A when engaged, which keeps brake power demand low during axis holding. When the rotor is clamped, the motor can withstand a short-term locked-rotor torque of 14.5 Nm without mechanical damage. The cast-aluminum frame weighs 17.7 kg, giving the housing useful thermal absorption while remaining suitable for many servo-driven axes. This mass also helps the assembly remain mechanically stable when the motor is mounted to gearbox faces, support plates, or rigid machine structures.