SR-A4.0125.030-14.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-A4.0125.030-14.000 is part of the SR Synchronous Servo Motors series and has a motor length of 324 millimeters. This servo motor offers a brake holding torque of 18 Newton-meters and weighs 17.7 kilograms. It is equipped with a resolver encoder type that provides a resolution of 8192 increments per revolution.
Internal Product Review
The SR-A4.0125.030-14.000 is a Bosch Rexroth Indramat synchronous servo motor with a rated speed of 3000 min⁻¹ and locked-rotor torque of 14.5 Nm. Resolver feedback with ±10 angular min accuracy supports precise positioning and dependable closed-loop response. A 24 V brake with 18 Nm holding torque adds strong axis retention, making the motor a highly capable choice for motion systems.
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Product Description:
The SR-A4.0125.030-14.000 is a synchronous servo motor built by Bosch Rexroth Indramat for the SR Synchronous Servo Motors series. In automated machinery, the unit converts drive current into controlled rotary motion and pairs with a resolver for position feedback so that a drive controller can regulate speed and torque precisely during indexing or continuous-duty cycles.
The electrical output is referenced to a nominal shaft velocity of 3000 min⁻¹, and each ampere applied to the windings produces about 1.37 Nm/A of torque. Power conductors terminate in a motor-side lead having a cross-section of 4 × 1.5 mm²; the separate brake circuit uses 2 × 1.5 mm² leads and draws only 0.7 A when energized. Locked-rotor testing shows 14.5 Nm of stall torque at a current of 10.6 A, a value applied by the drive to overcome static friction during start-up. Once rotation ceases, a spring-applied holding brake engages and is released again with a supply of 24 V. The brake’s own inertia is 3.1 × 10⁻⁴ kg·m², so its mass contribution has little effect on the servo’s acceleration profile. Overall housing length is 324 mm, allowing installation in compact drive compartments.
Static load retention is provided by the brake torque of 18 Nm, while dynamic performance is governed by a rotor inertia of 30 × 10⁻⁴ kg·m² that balances fast response with speed stability. Total mass reaches 17.7 kg, which assists heat sinking during continuous duty. The resolver delivers 8192 incr./rev. of position data and maintains ±10 angular minutes of accuracy, supporting tight closed-loop control. Cable routing is simplified by clearly separated motor and brake leads, and the specified cross-sections minimize voltage drop over typical cabinet distances. Together, these electrical, mechanical, and feedback characteristics ensure predictable behavior when the servo is used on gantries, packaging axes, or transfer lines.
