SE-B2.040.030-04.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-B2.040.030-04.000 is part of the SE Synchronous Servo Motors series and has a nominal speed of 3000 rpm with a holding torque of 3.5 Nm. It features a flange size of 100 mm, a shaft size of 14 by 30 mm, and weighs 8.8 kilograms without the brake. This servo motor has a brake voltage of 24 V ±10% and a standstill current of 4.4 Amps.
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Product Description:
The SE-B2.040.030-04.000 synchronous servo motor is produced by Bosch Rexroth Indramat as part of the SE Synchronous Servo Motors series. It is used in industrial automation systems that need accurate torque and velocity regulation, supplying rotational power to machine axes under closed-loop drive control. An integrated holding brake permits load securing at standstill, and the motor’s mechanical interface follows standardized flange dimensions for direct mounting to gear units and machine frames.
The brake is energized with 24 V ±10% and draws 0.7 A, so a low-current 24 V supply can maintain shaft locking without heavily loading the control power rails. Electrical response is characterized by an 8.1 ms time constant, indicating how quickly phase current rises when a command is issued. A square 100 mm flange forms the mounting face, and the keyed Ø14 × 30 mm shaft transmits torque to couplings. During continuous operation, the rotor can spin at 3000 rpm, while zero-speed holding is supported by a static torque of 5.0 Nm. The motor also has a torque constant of 1.14 Nm/A, which links commanded current to produced torque. A standstill current limit of 4.4 A helps limit overheating when the shaft is not turning.
As the winding accelerates, a mechanical inertia of 0.75 × 10⁻³ kg·m² combines with a ramp-up time of 21 ms to support short index moves with stable response. The generated back EMF follows a voltage constant of 124 V/1000 rpm, so the drive must raise applied voltage in proportion to speed. Internal copper losses are influenced by a winding resistance of 6.4 Ω, which affects heat rise during sustained current delivery. With a housing mass of 8.8 kg, excluding the brake, the motor offers a compact torque-to-weight balance while remaining within flange load and bearing limits.
