Product Description:

The SR-A4.0125.060-14.000 is a synchronous servo motor produced by Bosch Rexroth Indramat and assigned to the SR Synchronous Servo Motors series. It converts regulated drive current into controlled rotary motion for automated axes that need quick acceleration and tight position control. A holding brake locks the shaft when power is removed, while a resolver returns closed-loop position data to the drive controller. That feedback arrangement helps the paired drive maintain stable speed and position during frequent start-stop cycles. The motor is suited for packaging lines, pick-and-place stations, and other dynamic industrial equipment.

The motor reaches a rated speed of 6000 rpm, and each ampere of phase current generates 0.71 Nm/A for predictable torque response. When the shaft is stalled during startup, the motor can draw 17 A to produce strong breakaway force for demanding loads. A square mounting interface with a flange size of 142 mm aligns the housing to gearboxes or machine frames, and the overall length with brake measures 324 mm. Total rotational inertia including the encoder is 30 × 10⁻⁴ kg·m², while the brake adds 3.1 × 10⁻⁴ kg·m², which supports smooth acceleration matching in responsive axis systems. The Ø24 × 50 mm keyed shaft accepts standard couplings, and resolver accuracy of ±10 angular minutes supports steady velocity regulation.

The holding brake produces 18 Nm of static torque and is energized by a 24 V supply. The complete unit weighs 17.7 kg, which is relevant when the motor is mounted on vertical or cantilevered axes. The resolver provides 8192 increments per revolution, enabling smooth interpolation at the drive and finer motion feedback during low-speed operation. The brake assembly has a mass of 1.04 kg, and the release coil draws 0.7 A. These values describe the installed brake hardware without repeating the electrical and mounting data already given above.