Product Description:

The SR-A3.0068.030-10.825 is a synchronous servo motor built by Bosch Rexroth Indramat for the SR Synchronous Servo Motors series. It serves as a compact rotary actuator that delivers closed-loop speed and position control in automated machinery such as pick-and-place stations and indexing tables. Resolver feedback is integrated so the drive controller can monitor shaft angle continuously and adjust current in real time to meet commanded motion profiles. The compact format also suits machines where installation space is limited.

This motor reaches a rated speed of 3000 rpm, giving it the velocity range needed for moderate-to-high-cycle applications. A torque constant of 1.36 Nm/A links phase current to developed torque, enabling predictable sizing of the power stage. During stall tests, the unit can produce a locked-rotor torque of 6.8 Nm while drawing a locked-rotor current of 5.0 A; these figures show the short-term load the drive must withstand during startup. Dynamic response is influenced by the rotor inertia of 11 × 10^-4 kg·m², which supports smooth acceleration and controlled motion. Position sensing is handled by a resolver with an accuracy of ±10 angular minutes. The stator flange follows the IM B5 mounting pattern so the motor can bolt directly to gearboxes or machine frames without adapters.

The shaft can tolerate an allowable axial load of 133 N, protecting the bearings when belt tension or thrust couplings are used. The housing is rated IP67, guarding the internal windings against dust ingress and temporary immersion. The resolver provides 8192 increments per revolution, which aids fine positioning at low speeds. Bearings are rated for a minimum service life of 20,000 hours, which helps reduce maintenance intervals. The motor can also withstand shocks up to 6 g, allowing installation on moving carriages or vibration-prone equipment without compromising alignment.