Product Description:

The SF-B4.0230.030-04.056 is a servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. It converts three-phase electrical power into controlled rotary motion for positioning, indexing, and speed-regulated machine functions in industrial automation. An absolute encoder mounted on the shaft sends clear position data to the drive controller, so the axis can report its position immediately after power is applied. This feedback arrangement supports precise starts, stops, and speed changes without relying on incremental homing routines. That behavior is useful on machines that must resume operation without a reference move after brief power interruptions.

The flange interface measures 142 mm, matching IM B5 mounting layouts for direct attachment to geared reducers or machine frames. During continuous operation, the shaft can rotate at a rated speed of 3000 rpm, which fits common servo applications that require high response and steady velocity. A torque constant of 1.57 Nm/A shows the torque produced for each ampere of phase current, making the motor’s electrical response easier to interpret. When the rotor is mechanically locked, the motor can exert up to 22 Nm while the stator windings conduct 14 A. Two NTC temperature sensors embedded in the winding send thermal feedback to the amplifier so current can be limited if the winding temperature rises too far.

For power-off holding, the integrated brake supplies 18 Nm of static torque. The brake coil operates from 24 V DC ±10%, 5% ripple and draws 0.7 A, allowing it to share a standard control power source. Rotor inertia is 54 × 10⁻⁴ kg·m² with the encoder installed, which helps the drive balance quick acceleration with stable speed regulation on medium-mass loads. The combination of brake holding force, encoder feedback, and winding temperature monitoring suits printing, packaging, and pick-and-place axes that need repeatable motion and controlled stopping.