SR-B5.0460.020-10.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-B5.0460.020-10.000 is a synchronous servo motor from the SR Synchronous Servo Motors series with a flange size of 190 mm and a mass of 35 kg. It features a resolver encoder with 8192 increments per revolution and a protection rating of IP67. The motor has a rated speed of 2000 rpm, a locked-rotor torque of 46 Nm, and a DC link voltage of 670 V.
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Product Description:
The SR-B5.0460.020-10.000 is a synchronous servo motor built by Bosch Rexroth Indramat for the SR Synchronous Servo Motors series. Designed for closed-loop motion axes in presses, gantries, and packaging equipment, the unit interfaces with digital drives to deliver precise torque and velocity. Its electromechanical design supports high moment loads, while the stator windings accommodate the DC-link architecture commonly found in Rexroth multi-axis systems, making the motor a compact actuator for demanding industrial automation tasks.
During continuous operation, the motor reaches a rated speed of 2000 rpm, allowing servo controllers to command moderate line velocities without secondary gear reduction. A torque constant of 2.2 Nm/A links drive current to output torque, so 10 A of phase current produces approximately 22 Nm at the shaft. The windings are energized from a DC link that may rise to 670 V, supporting rapid acceleration during dynamic motion cycles. When the rotor is locked, the motor can produce 46 Nm while drawing a locked-rotor current of 21 A, which is relevant when selecting protective devices and configuring the drive. Mechanical integration uses a 190 mm square flange that matches compatible mounting patterns and provides a rigid connection to the machine frame.
The housing carries an IP67 rating, so the stator and resolver remain sealed against dust and temporary immersion in water. Long-term operation is supported by a bearing life of 20,000 hours, while a total mass of 35 kg affects the selection of horizontal-axis support hardware and lifting equipment. Position feedback is generated by a resolver with a resolution of 8,192 increments per revolution, allowing the connected drive to monitor rotor position accurately throughout the operating range. Smooth response is aided by a rotor inertia of 166 × 10⁻⁴ kg·m², which influences acceleration and deceleration behavior under changing loads. The motor has a length of 383 mm, an IM B5 footless mounting style, and a shaft measuring 32 mm in diameter by 58 mm in length for connection to standard couplings.
