Product Description:

The SE-B4.090.030-00.018 is a synchronous servo motor built by Bosch Rexroth Indramat and supplied within the SE Synchronous Servo Motors series. As a rotary actuator for industrial automation, the unit converts controlled stator current into precise shaft torque, letting machine tools, packaging stations, or assembly axes follow drive commands with minimal latency. Its frame integrates an A-flange interface, so the motor can mount directly to gearboxes or mechanical load frames without additional adapters.

The motor has a nominal speed of 3000 rpm and produces 9.0 Nm of static torque. The magnetic design provides a torque constant of 0.87 Nm/A, which relates output torque linearly to the applied phase current. During standstill, the windings draw 10 A, a value that keeps the motor at rated flux without overheating, while transient acceleration can demand up to 62 A of peak current for short periods. The associated voltage constant of 97 V per 1000 rpm indicates the back electromotive force and helps with drive sizing. The winding has a resistance of 1.92 Ω and an inductance of 16.1 mH, which influence current ripple and the servo drive’s control bandwidth. The shaft measures 24 mm in diameter and 50 mm in length, providing sufficient torsional stiffness for inline coupling.

The housing is sealed to IP67, protecting the bearings and windings against dust ingress and temporary immersion. The A-flange has a 142 mm square pattern that matches standard gearbox faces. The rotor has a moment of inertia of 2.18 × 10⁻³ kg·m², enabling fast speed changes without causing servo instability. The motor weighs 13.0 kg, keeping lifting requirements moderate during installation. Dimensional tolerances meet flange accuracy grade R, supporting concentric rotation when the shaft is coupled to high-precision loads. Vibration performance also meets grade R, helping reduce vibration transferred to adjacent machine components during operation.