Product Description:

The SF-A4.0230.060-14.071 is a permanent-magnet servo motor manufactured by Bosch Rexroth Indramat for the SF Servo Motors series. It provides closed-loop rotary motion for automated tooling, packaging axes, and material-handling stations that demand fast response and repeatable positioning. An absolute encoder is integrated into the housing so the drive can capture position immediately on power-up and coordinate multi-axis moves without homing. This arrangement also helps the axis return to controlled operation quickly after brief power interruptions. The output shaft follows the Ø24 × 50 mm profile, enabling direct coupling to standard metric hubs.

At its rated speed of 6000 rpm, the rotor completes controlled revolutions while producing torque in proportion to phase current. The motor’s torque constant of 0.88 Nm/A allows the drive to generate nearly a newton-meter of electromagnetic torque for each ampere of current. Position feedback is highly granular, with an encoder resolution of 8 million increments per revolution, giving the controller very fine indexing capability. A 142 mm flange sets the mounting footprint, and the 388 mm overall length accommodates the stator stack and the integrated holding brake. That brake is energized from a 24 V DC supply and draws 0.7 A, while adding only modest mass and inertia to the assembly. The housing length also leaves room for the internal feedback components without requiring external add-on hardware.

During transient events, the drive may command stall-level currents, and the locked-rotor current reaches 25 A. Under those conditions, the motor develops a locked-rotor torque of 22 Nm, which supports recovery from short-duration overloads or startup resistance. Once motion stops, the motor can hold static loads with a continuous torque of 18 Nm, reducing the need for external clamping devices. Dynamic response is influenced by the rotor inertia of 54 × 10⁻⁴ kg·m², which helps balance quick acceleration with stable shaft behavior during high-speed indexing. This operating profile is well suited to axes that alternate between rapid moves and controlled dwell periods.