Product Description:

The SE-B4.210.050-04.000 is a synchronous servo motor built by Bosch Rexroth Indramat for the SE Synchronous Servo Motors series. It converts drive current into precisely controlled mechanical rotation for position or velocity loops in automated machinery. The motor is designed for high-speed axes where compact packaging and an integrated holding capability simplify installation in production lines such as pick-and-place gantries and rotary transfer stations.

At its nominal operating point, the rotor reaches 5000 rpm, allowing direct coupling to fast indexing mechanisms. Continuous load handling is supported by a standstill torque rating of 18 Nm, while the drive can deliver up to 52.0 Nm for short acceleration bursts. Torque production is characterized by a torque constant of 0.64 Nm/A, which relates commanded current to developed torque and supports drive gain settings. Transient demands are satisfied with a peak phase current of 174 A, yet rotor inertia remains only 4.98 × 10⁻³ kg·m², so speed changes occur with limited servo lag. The standstill current is 28 A, and the winding resistance is 0.27 Ω. A voltage constant of 68 V/1000 rpm indicates the back electromotive force used for regenerative calculations.

Mechanical integration centers on the spring-applied brake and the motor envelope. With the brake fitted, the housing length is 394 mm, and the unit weighs 24 kg, keeping moments low on compact frames. A 24 × 50 mm keyed shaft transmits torque, while the brake circuit is energized by 24 V ±10%. Release and set times of 50 ms and 55 ms support processes that require quick clamping at the end of a cycle. The phase inductance of 3.3 mH affects current-loop response and drive filter tuning. The keyed shaft provides positive engagement with rigid couplings or driven mechanisms, while the brake holds the connected load when commanded.