Product Description:

The SR-A4.0230.030-00.048 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. It is intended for closed-loop positioning and velocity tasks in factory automation, where compact rotary drives must supply consistent torque across rapid acceleration cycles. Resolver feedback is built in to return rotor angle, allowing the connected drive controller to maintain precise electrical commutation and improve dynamic response.

This model sustains a rated mechanical speed of 3000 rpm, giving machine builders a fixed velocity ceiling for sizing gear ratios and cycle times. Electromagnetic conversion efficiency is reflected by its torque constant of 1.57 Nm/A; each ampere of phase current produces 1.57 newton-meters of shaft torque at a winding temperature of 20 °C. When the shaft is locked, the motor can deliver a stall torque of 22 Nm while drawing a locked-rotor current of 14 A, which is useful when evaluating axis holding capacity and drive inverter current limits. The rotor’s mass moment of inertia is 54×10⁻⁴ kg·m², so acceleration profiles must account for this value to avoid excessive peak currents and mechanical stress.

A total mass of 25 kg supports mounting assessments on sliding stages or gearbox flanges, and the housing withstands shocks up to 6 g, supporting installation on presses or pick-and-place gantries subject to impact loads. The resolver offers an internal resolution of 8192 increments per revolution, complemented by an accuracy of ±10 arc-minutes for mid-range precision applications. Power is transmitted through a keyed shaft that measures Ø24 × 50 mm, matched to an A8 × 7 × 40 feather key for rigid coupling. Additional physical attributes include a 341 mm overall length, a size-1 motor connector, and a 4 × 2.5 mm² cable requirement, which assist with conductor routing and space planning.