SR-B4.0230.030-10.030 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-B4.0230.030-10.030 is part of the SR Synchronous Servo Motors series, offering a rated speed of 3000 min-1 and a flange size of 142 mm. This servo motor has a protection type of IP67 and a mass of 25 kg. It features a resolver feedback with a resolution of 8192 increments per revolution and a locked-rotor torque of 22 Nm.
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Product Description:
The SR-B4.0230.030-10.030 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. It converts drive current into tightly regulated rotary motion for positioning axes, pick-and-place units, and other automated machinery that requires continuous closed-loop control. A resolver mounted on the shaft supplies real-time rotor angle data to the drive controller, allowing quick vector corrections during acceleration, deceleration, and steady-state operation. This feedback arrangement enables the controller to monitor shaft position without relying on a separate external measuring system.
This model delivers a rated speed of 3000 rpm and develops a locked-rotor torque of 22 Nm when the stator is energized at a stall current of 14 A. The electromagnetic design produces a torque constant of 1.57 Nm/A, so the drive can calculate output torque by monitoring phase current. Mechanical integration is aided by a 142 mm square mounting flange, a 24 × 50 mm keyed shaft, and an overall motor length of 341 mm. Position feedback is handled by a resolver that provides 8,192 increments per revolution with an accuracy of ±10 angular minutes, giving the servo loop fine command resolution. The bearings have an operating life rating of 20,000 hours for continuous-duty applications when the motor is installed and operated under the required conditions.
The IP67 enclosure protects internal components against dust ingress and temporary immersion, while the housing withstands mechanical shocks of up to 6 g during transport or impacts on the production line. Dynamic response is influenced by a rotor inertia of 54 × 10⁻⁴ kg·m², which balances quick acceleration with smooth speed regulation. The motor has a total mass of 25 kg, providing a stable mechanical base when it is secured to the machine structure. An O-ring groove in the flange helps seal the mounting interface against contaminants. A 24 mm shaft seal protects the bearing area, while the resolver’s sealed housing helps preserve lubrication and protects the feedback components throughout the motor’s operating life.
