SR-B4.0230.030-00.030 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-B4.0230.030-00.030 is a servo motor from the SR Synchronous Servo Motors series, featuring forced-air cooling and a mass of 25 kg. It has a rated speed of 3000 rpm, a locked-rotor torque of 22 Nm, and uses resolver feedback with a resolution of 8192 increments per revolution. The motor's flange diameter is 165 mm, with a shaft diameter of 24 mm and a shaft style that includes both a keyway and feather key.
Internal Product Review
The SR-B4.0230.030-00.030 is a Bosch Rexroth Indramat synchronous servo motor that delivers efficient forced-air cooling and a 3000 min-1 rated speed. Resolver feedback with 8192 incr/rev supports precise motion control and dependable tuning in servo applications. A 22 Nm locked-rotor torque makes this unit a strong choice for demanding axis drives.
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Product Description:
The SR-B4.0230.030-00.030 is a synchronous servo motor manufactured by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. It is intended for industrial automation tasks that demand precise velocity and torque control, such as indexing stations, rotary tables, and packaging axes. When integrated with a compatible drive controller, the motor converts electrical commands into controlled mechanical rotation, enabling repeatable positioning and rapid duty-cycle changes on the production floor.
The motor delivers a rated shaft speed of 3000 rpm, establishing the electrical commutation frequency required from the inverter. A torque constant of 1.57 Nm/A indicates the proportional relationship between phase current and developed torque. The windings are matched to a DC-link voltage of 670 V, ensuring that full speed is reached without field weakening when the intermediate circuit maintains this voltage. Resolver feedback provides 8192 increments per revolution of interpolated position data, allowing fine position measurement for smooth servo control. When the rotor is blocked, the stator can draw up to 14 A, so the drive components and protective devices must accommodate this locked-rotor current.
Forced-air cooling maintains temperature stability while a locked-rotor torque of 22 Nm can be held at standstill. Positioning repeatability is enhanced by a feedback accuracy of ±10 angular minutes, reducing cumulative error in multi-axis systems. The rotor and encoder assembly has an inertia of 54 × 10⁻⁴ kg·m², balancing fast acceleration with load damping. A total mass of 25 kg must be supported by the machine frame, while a flange diameter of 165 mm provides the primary mounting interface. The motor also has a 130 mm pilot and a 24 mm keyed shaft that extends 50 mm. A feather key in the shaft keyway transfers torque to gears or couplings without slipping.
