Product Description:

The SE-B4.210.050-14.000 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. Designed to deliver closed-loop rotary motion in automated tooling, pick-and-place stations, and other high-speed axes, the unit couples directly to a digital drive controller to translate commanded current into proportional shaft torque and velocity. Its construction supports precise positioning and quick reversals required in modern industrial automation environments.

At the core of the motor’s performance envelope is a static holding capability of 18 Nm, providing sufficient stall torque for load retention during standstill. During continuous operation, the rotor can maintain a shaft velocity of 5000 rpm, a rate established by its magnetic pole count and drive frequency. Copper loss is limited by a phase winding resistance of 0.27 Ω measured at 20 °C, while current rise time is governed by an electrical time constant of 12.0 ms. The back-electromotive force scales linearly with speed at 68 V/1000 rpm, a parameter used by the drive to calculate required DC-bus voltage. For rapid accelerations, the windings can accept a peak current of 174 A without exceeding thermal thresholds.

Short bursts of up to 52.0 Nm are available for overcoming inertia, which is 4.98 × 10⁻³ kg·m² when the integral tachogenerator is included. A cast flange that measures 142 mm across centers the frame. The 3.3 ms mechanical time constant supports quick speed changes with minimal overshoot. The unit weighs 22.0 kg, so mounting structures must tolerate that static load. Heat generated by the 28 A standstill current and the 3.3 mH inductance is absorbed by the stator iron, and temperature rises predictably following a thermal time constant of 32 min. A torque constant of 0.64 Nm/A assists in selecting appropriate current loops for precise servo regulation.