SE-C4.210.030-04.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-C4.210.030-04.000 is part of the SE Synchronous Servo Motors series and has a nominal speed of 3000 rpm. This servo motor provides a maximum torque of 57.4 Nm with Sm 35/70 and a static torque of 21 Nm. It features a flange size of 142 mm, weighs 22.0 kg excluding the brake, and has a peak current of 158 A.
Internal Product Review
The SE-C4.210.030-04.000 is a synchronous servo motor with 21 Nm static torque and 3000 rpm nominal speed. An 18 Nm holding brake and 57.4 Nm maximum torque with SM 35/70 give this unit excellent load control and strong dynamic performance. This motor stands out as a highly capable choice for servo systems that demand stable, responsive torque delivery.
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Product Description:
The SE-C4.210.030-04.000 is a permanent-magnet synchronous servo motor manufactured by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. Intended for closed-loop automation axes, the unit couples directly to gearboxes, ball screws, or belt drives and provides the rapid acceleration and positional accuracy required by packaging, handling, and machining equipment. When paired with a Rexroth drive controller, the motor translates digitally issued current commands into mechanical rotation while delivering feedback signals that allow the drive to regulate motion precisely.
Its continuous operating point has a nominal speed of 3000 rpm; at this velocity, the magnetic field remains synchronized with the stator excitation to minimize ripple. A static torque capacity of 21 Nm allows the shaft to hold loads at standstill without external locking devices. The motor has a torque constant of 0.92 Nm/A, meaning each ampere supplied by the inverter produces just under one newton-meter of torque. Dynamic events are supported by a peak current ceiling of 158 A, producing up to 57.4 Nm during short acceleration bursts, while the thermal standstill current limit is 23 A. Current buildup is characterized by an electrical time constant of 11.9 ms. The motor also has a voltage constant of 102 V per 1000 rpm, which helps establish the drive’s control bandwidth. The windings have an inductance of 6.2 mH and a resistance of 0.51 Ω.
Mechanical integration is aided by a square flange that measures 142 mm, and the shaft stub is 24 mm in diameter and 50 mm long to accommodate standard keyway couplings. The laminated rotor and tachometer generator have an inertia of 4.98 × 10⁻³ kg·m², providing a balance between quick acceleration and the damping of load disturbances. For vertical or safety-critical axes, the integrated holding brake supplies 18 Nm of torque while drawing 1.0 A when engaged. Without the brake, the motor weighs 22.0 kg, keeping the frame mass moderate for gantry or robot installations.
