SE-KB4.020.030-10.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-KB4.020.030-10.000 is a synchronous servo motor from the SE Synchronous Servo Motors series. It features a flange diameter of 185 mm and a shaft size of 19 by 28 mm, and weighs 7 kg. The motor delivers a nominal speed of 3000 rpm, peak current of 15 A, and static torque of 2.0 Nm.
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Product Description:
Bosch Rexroth Indramat manufactures the SE-KB4.020.030-10.000, a compact member of the SE Synchronous Servo Motors series used for axis control in automated machinery. The unit converts drive commands into precise rotary motion, allowing position or velocity loops to be closed without introducing backlash from an additional mechanical transmission. In installations that require quick acceleration and repeatable speed regulation, the motor interfaces directly with compatible Rexroth drives and provides the electromechanical output stage for packaging, pick-and-place, and light material-handling equipment.
The motor delivers a nominal shaft speed of 3000 rpm when powered by a matched inverter, providing a continuous torque of 2.0 Nm at that speed. A torque constant of 0.80 Nm/A links command current to output torque, so drive tuning can rely on predictable gain across the working range. During acceleration, the winding can accept up to 15 A of peak current. A rotor inertia of 0.74 × 10⁻³ kg·m² supports responsive changes in speed during commanded motion. The internal electromagnetic system completes a full speed step in 54 ms, supporting rapid indexing. Mechanical integration is straightforward because the smooth shaft has no keyway and measures Ø19 × 28 mm. The housing has an overall length of 204 mm, allowing installation in machinery with limited axial space.
At standstill, the motor requires 2.5 A to support load torque, minimizing heat generation before motion starts. A back EMF of 85 V/1000 rpm establishes the voltage margin required from the inverter. The circular mounting face has a Ø185 mm flange for direct attachment to gearboxes or machine plates. The stator has a winding inductance of 81.0 mH and a resistance of 17.30 Ω, which influence current ripple during vector control. The motor weighs 7 kg, reducing the load placed on the supporting machine structure and simplifying axis balancing. The assembly is supplied without a mating connector, allowing the machine wiring to use a connector and pin arrangement selected for the installation.
