Product Description:

The SF-A4.0230.030-14.151 is a rotary actuator supplied by Bosch Rexroth Indramat within the SF Servo Motors series. Designed for closed-loop motion systems, it converts regulated drive current into precise shaft rotation so conveyors, pick-and-place heads, or indexing stations can follow programmed speed and position profiles in automated production lines. The closed-loop arrangement allows the drive to correct position and velocity errors as operating loads change. During continuous operation, the shaft turns at 3000 rpm.

The electromagnetic stack delivers a steady holding torque of 18 Nm, while startup or stall conditions permit a locked-rotor torque of 22 Nm if the drive supplies the corresponding inrush current of 14 A. A torque constant of 1.57 Nm/A links current and output torque for simplified controller tuning. Speed feedback is provided by an absolute encoder that retains position data after power loss, so homing is not required after routine power interruptions. The integrated brake contributes 1.04 kg of mass and 0.00031 kg·m² of inertia, allowing the axis to stop quickly without external dampers. Power reaches the stator through a motor cable sized 4 × 2.5 mm², and a separate 2 × 1.5 mm² line energizes the brake coil.

The brake engages whenever its circuit receives 24 VDC, drawing 0.7 A to lock the rotor for maintenance or emergency stops. The front bearing can absorb thrust loads up to 154 N, supporting direct coupling to ball screws, gears, or belt pulleys. A connector size of 1 (6-pin) combines power, sensor, and brake conductors into a single keyed plug, reducing wiring time. The housing endures shocks of 6 g, so encoder alignment is maintained even under rapid deceleration or transport impacts.