Product Description:

The SR-A1.0008.060-14.000 is produced by Bosch Rexroth Indramat for the SR Synchronous Servo Motors series. Engineered as a rotational actuator for tightly regulated machine axes, the unit converts drive current into repeatable torque and speed for packaging lines, pick-and-place gantries, and semiconductor tools. It uses IM B5 construction with a smooth Ø11 × 23 mm shaft, allowing direct coupling to pulleys or gearheads on a face-mounted flange without additional adapters. This layout suits compact servo axes where the motor mounts directly to a machine plate or reducer and where short transmission paths help maintain stiffness.

The motor reaches a rated speed of 6000 rpm, allowing fast cycle times while staying within bearing limits. Its torque constant is 0.60 Nm/A, so each ampere of phase current produces slightly more than half a newton-meter for precise current-loop control. The motor uses a 70 mm square flange for mounting, matching compact reducers and indexers. When the rotor is locked, the stator can draw up to 1.35 A and produce 0.8 Nm of stall torque. Position feedback comes from a resolver with an accuracy of ±10 angular minutes, and the low rotor inertia of 0.43 × 10⁻⁴ kg·m² helps the axis respond quickly with limited overshoot. The resolver also supplies rotor angle data for commutation and stable speed regulation during rapid direction changes.

For power-off safety, the motor has a permanent-magnet holding brake with 2.0 Nm of torque. The brake releases on 24 VDC and requires 0.4 A to remain open during operation, which keeps auxiliary power demand low. The resolver provides 8192 increments per revolution for fine position feedback, and the brake helps hold vertical loads when drive power is removed. This combination is useful on axes that must remain in position at standstill without unwanted drift.