Product Description:

The SF-A3.0068.030-14.056 is an AC servo motor manufactured by Bosch Rexroth Indramat as part of the SF Servo Motors series. It is intended for precision motion tasks in industrial automation, where a drive controller energizes the stator windings to generate controlled torque at the rotor. By supplying repeatable rotary movement, the motor positions tooling heads, index tables, or conveyor zones with accurate response and stable speed control. A standardized flange interface lets the device bolt directly to gear reducers or machine frames, and the integrated holding brake keeps the shaft still when power is removed. Because the motor is used in closed-loop motion systems, it is suited for applications that require repeatable starts, stops, and short positioning moves.

The motor has a rated speed of 3000 rpm and a torque constant of 1.36 Nm/A, so current from the drive converts proportionally into output torque during normal operation. This relationship helps the axis produce predictable torque during acceleration and controlled low-speed movement. Installation space is set by a square flange that measures 116 mm across, allowing the housing to fit common machine layouts for this motor class. The mechanical connection can tolerate an axial load of 133 N without excessive bearing stress, which helps protect the shaft support during coupled operation. During startup or stall conditions, the stator can draw a locked-rotor current of 5.0 A to produce a holding torque of 6.8 Nm.

The permanent-magnet brake operates on 0.66 A supplied at 24 VDC and generates a static torque of 10.0 Nm to secure the shaft when motion is suspended. The brake section adds 0.6 kg of mass and contributes an inertia of 1.06 × 10⁻⁴ kg·m², which increases the rotating load seen by the drive during rapid speed changes. Energy produced during stopping can be dissipated through an external 5.6 Ω plug-in resistor to help prevent drive overvoltage on the connected system. For handling or transport, the motor withstands shocks up to 6 g before installation. The resistor path manages regenerated energy during deceleration, while the brake keeps the axis from drifting at standstill.