Product Description:

The SR-A2.0026.060-04.015 is a synchronous servo motor manufactured by Bosch Rexroth Indramat for the SR Synchronous Servo Motors series. The unit is intended for industrial automation tasks that require controlled torque and rapid speed changes, including indexing tables and pick-and-place axes. Integrated resolver feedback allows the drive to monitor shaft position and adjust motor current during closed-loop operation. An electromagnetic brake prevents vertical or suspended loads from drifting when motor power is removed.

The brake operates at 24 VDC and draws 0.56 A while being released. When engaged, it provides a holding torque of 3.2 Nm to secure a stationary load. During motion, the torque constant of 0.78 Nm/A provides a predictable relationship between drive current and mechanical output, supporting controlled acceleration. Continuous operation is supported at speeds up to 6000 rpm. The resolver delivers 8192 increments per revolution, allowing the controller to perform fine position interpolation, and its feedback accuracy remains within ±10 angular minutes. The shaft connects to machinery through an A5 × 5 × 25 feather key seated in a Ø95 j6 flange pilot. Locked-rotor current is limited to 3.5 A to control the thermal load on the windings when the axis is restrained.

The rotor has an inertia of 4 × 10^-4 kg·m², supporting rapid response while maintaining torsional stability during speed changes. Including the brake, the motor weighs 6.5 kg and has an overall length of 229 mm, making it suitable for installations with limited axial space. Output torque is transmitted through a Ø14 × 30 mm shaft, which provides a compact mechanical interface for couplings and driven components. The motor produces a locked-rotor torque of 2.7 Nm when motion is prevented. This torque is available before rotation begins, while the associated current limit helps protect the windings during short periods of restraint.