SR-A5.0460.030-04.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-A5.0460.030-04.000 is part of the SR Synchronous Servo Motors series and has a mass of 40.2 kilograms with a motor length of 428 millimeters. It provides a holding torque of 56 Newton meters and operates at a rated speed of 3000 rpm. The servo motor features a shaft size of 32 by 58 millimeters and a resolver resolution of 8192 increments per revolution.
Internal Product Review
The SR-A5.0460.030-04.000 is a Bosch Rexroth Indramat SR synchronous servo motor with a rated speed of 3000 rpm and a holding torque of 56 Nm. Brake performance appears especially well matched for controlled stopping, with 24 VDC brake voltage and a 97 ms release time. The 8192 incr./rev. resolver resolution stands out as a strong fit for precise servo applications.
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Product Description:
The SR-A5.0460.030-04.000 is a permanent-magnet servo motor manufactured by Bosch Rexroth Indramat as part of the SR Synchronous Servo Motors series. It converts drive commands into tightly regulated rotary motion for positioning tables, indexing conveyors, and other closed-loop axes in industrial automation. Integrated resolver feedback allows the controller to monitor the shaft angle in real time. An electromechanical holding brake secures the load when the drive is disabled, making the motor suitable for vertical axes and applications that require load retention at standstill.
The brake can maintain a static torque of 56 Nm, and the rotor reaches a rated speed of 3000 rpm during continuous operation. Electromagnetic output increases with current at a torque constant of 1.58 Nm/A, providing predictable torque development across the operating range. During startup, the stator may draw a locked-rotor current of 29 A RMS to generate 46 Nm of breakaway torque. Brake excitation is supplied at 24 VDC with a current of 1.33 A, and the brake mechanism adds 0.0030 kg·m² of inertia to the drivetrain. The resolver provides 8,192 increments per revolution, allowing the controller to maintain precise position and velocity loops. The 428 mm housing length accommodates the active motor components and brake assembly within a single enclosure.
The square mounting flange has a width of 180 mm and provides a broad mounting surface for attachment to a machine frame or gearbox. The output shaft measures 32 mm in diameter and 58 mm in length, and it uses an A10 × 8 × 50 feather key for positive engagement with keyed couplings. The net rotor inertia is 0.0166 kg·m², supporting load matching with medium-mass gear stages and controlled acceleration profiles. The spring-applied brake releases within 97 ms, reducing the delay between the release command and shaft movement. The motor has an overall mass of 40.2 kg, which must be considered when sizing the mounting surface and handling equipment. Its keyed shaft transfers torque without relying solely on coupling friction, while the resolver supplies the feedback required for closed-loop operation.
