Product Description:

The SF-A3.0068.030-14.015 is a servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. In automated machinery, the unit translates drive current into controlled rotary motion for positioning, feed, or spindle axes that demand repeatable accuracy. Because it integrates a permanent-magnet rotor, an encoder interface, and an electromechanical holding brake, the motor forms a compact actuator that pairs with Indramat drive controllers to close torque and velocity loops in packaging, printing, and material-handling stations.

At its continuous operating point, the rotor reaches 3000 rpm, a speed that matches drive output frequencies common in inverters that switch at 8 kHz. The motor generates a static holding torque of 10.0 Nm, allowing vertical axes to maintain position when power is removed. With a torque constant of 1.36 Nm/A, the drive amplifier can predict torque production directly from phase current feedback. An allowable axial force of 133 N protects the bearings when belt or pinion loads are applied. Internally, two NTC temperature sensors report winding temperature so that the drive can reduce current before thermal limits are reached. The windings are energized from a bus that reaches 670 VDC, giving high voltage headroom for dynamic acceleration.

For start-up and emergency stop situations, the integrated brake is energized with 24 VDC, draws 0.66 A, and adds 0.6 kg to the housing mass. Its inertia contribution of 1.06 × 10⁻⁴ kg·m² is small compared to the rotor and limits overshoot, while a 5% brake torque ripple keeps residual vibration low. When the rotor is held mechanically, the drive may see a locked-rotor current of 5.0 A and must be sized for the resulting 6.8 Nm stall torque. The assembly withstands impacts up to 6 g without magnetic or bearing damage and operates at an acoustic level of 58 dB(A), supporting installation near line operators in general-purpose automation cells.