SE-B5.440.020-14.015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-B5.440.020-14.015 is a synchronous servo motor from the SE Synchronous Servo Motors series. It delivers a maximum torque of 123 Nm and a nominal speed of 2000 rpm, with a peak current of 207 Amps. This motor has a shaft diameter of 32 mm by 58 mm and weighs 39 kg without a holding brake.
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Product Description:
The SE-B5.440.020-14.015 is a synchronous servo motor built by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. It functions as the rotary actuator in automated machinery, supplying controlled torque and velocity to positioning, conveying, or cycle-timed tooling axes. The motor combines permanent-magnet excitation with integrated speed feedback so that the paired inverter can regulate motion in closed loop, supporting fast indexing and repeatable accuracy on assembly lines and machine tools. This feedback arrangement helps the drive correct speed deviation as load conditions change during normal operation. It also supports stable motion through repeated starts, stops, and direction changes.
The motor’s rated performance starts with a nominal speed of 2000 rpm. It produces this speed while supplying a standstill current of 35 A that balances copper losses with cooling capacity. At zero speed it develops a static torque of 52 Nm, giving holding force for clamping or vertical axes. During acceleration the electromagnetic system permits a maximum of 123 Nm, and momentary surges draw a peak current of 207 A. With a torque constant of 1.51 Nm/A, the drive can translate commanded torque into current setpoints. The Ø32 × 58 mm shaft transfers output through keys or couplings, and the 190 mm flange keeps the motor centered on the machine frame.
Dynamic response is characterized by an electrical time constant of 18.6 ms and a mechanical time constant of 2.0 ms. These values show that current rise and rotor speed response occur within milliseconds after a command change. The combined rotor and tachogenerator inertia is 18.6 × 10⁻³ kg·m², which helps resist sudden speed disturbance from changing loads. Magnet flux links to the coils at 167 V per 1000 rpm, enabling back-EMF-based speed estimation by the controller. The stator’s winding inductance of 5.0 mH filters rapid inverter edges, while a 0.26 Ω resistance contributes to steady-state copper loss. Without a holding brake the motor mass is 39 kg, and the housing length of 395 mm helps the unit fit into compact machine layouts.
