Product Description:

The SF-A5.0250.030-10.050 is a synchronous servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. It provides closed-loop position and speed regulation in packaging, handling, and machining axes where stable motion and repeatable response are required. The motor incorporates DSF plus multi-turn absolute encoder feedback for fine commutation and immediate position availability after power-up, so a separate homing move is not required. Because it is supplied without a blocking brake, holding must be provided by the external drivetrain when power is removed. The housing has an overall length of 386 mm, which supports installation in typical machine spaces while leaving room for the electromagnetic stack needed for high torque output.

Its continuous operating range includes a nominal speed of 3000 rpm, indicating the shaft velocity available under rated load without exceeding thermal limits. At standstill, the motor can deliver 19.5 Nm, and doing so requires a standstill current of 32.2 A, which shows the relationship between torque production and winding load at zero speed. A torque constant of 0.61 Nm/A links output torque to phase current, helping the drive regulate commanded force smoothly across the speed range. The phase windings have an inductance of 2.7 mH and a resistance of 0.25 Ω, which influence current rise, ripple behavior, and controller tuning.

For short, high-demand moves, the drive can supply a peak current of 145.0 A, enabling the rotor to generate up to 60.6 Nm of maximum torque during acceleration or brief overload periods. Dynamic response is influenced by a rotor inertia of 42 × 10⁻⁴ kg·m², which helps determine how quickly the motor can change speed when paired with the connected load. The assembled mass of 22.0 kg should be considered where moving-axis weight matters, especially on gantries or robotic arms. Mechanical integration uses a 24 k6 mm shaft diameter with an 8 × 7 × 40 mm key and a 130 j6 mm centering shoulder for accurate alignment with couplings or pulleys.