SR-A4.0172.030-00.015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-A4.0172.030-00.015 is part of the SR Synchronous Servo Motors series and comes with a 142 mm flange size that follows IEC 72-2 and DIN 42948 standards. This servo motor has a resolver encoder type with a resolution of ±10 arcmin or 8192 increments per revolution, and a rated speed of 3000 revolutions per minute. Its locked-rotor torque is 18 Nm, with a torque constant of 1.38 Nm per amp, and it operates at a DC link voltage of 670 volts.
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Product Description:
Bosch Rexroth Indramat manufactures the SR-A4.0172.030-00.015, a synchronous servo motor in the SR Synchronous Servo Motors series. The unit converts high-voltage bus power into controlled rotary motion for positioning and velocity control tasks in assembly cells, gantry systems, and packaging machines. Its compact IM B5 housing with a front-mounted flange simplifies direct coupling to gear stages or inline shafts on modular machinery. Because it is a synchronous servo motor, it supports closed-loop motion systems that require repeatable positioning and steady speed regulation.
The drive section of this motor is supplied from a 670 V DC link, allowing efficient power transfer between the inverter and the stator windings. A torque constant of 1.38 Nm/A indicates the torque produced for each ampere of phase current, which helps match the motor to a suitable drive amplifier. The rotor can run continuously at 3000 rpm, giving fast cycle times without exceeding thermal limits. Acoustic emission is limited to 58 dB(A) at 1.0 m, which helps keep machine noise moderate near the installation area. During startup or when the shaft is prevented from turning, the windings may draw 13 A of locked-rotor current to establish the required magnetic field.
At zero speed, the motor can provide a locked-rotor torque of 18 Nm for holding or clamping duties. Mounting uses a 142 mm flange built to IEC 72-2 / DIN 42948, and the cylindrical output shaft measures Ø24 × 50 mm for standard couplings. The rotating assembly, including the resolver, has an inertia of 40 × 10⁻⁴ kg·m², which supports quick acceleration while maintaining stable control response. Components withstand shocks up to 6 g, making the motor suitable for dynamic tooling heads. Resolver feedback with a resolution of ±10 arcmin / 8192 increments per revolution supplies precise position data to the drive and allows accurate shaft-angle tracking during motion and at standstill.
