Product Description:

The SF-A4.0125.030-10.053 is a brushless servo motor built by Bosch Rexroth Indramat within the SF Servo Motors series. As an electromechanical actuator, it converts commanded current into controlled torque and speed so machinery axes can position, follow velocity profiles, or hold loads in industrial automation lines such as packaging, pick-and-place stations, and material handling cells. The unit is driven by a matched amplifier that supplies three-phase power while its integrated encoder returns position data for closed-loop control. That feedback loop lets the controller correct for changing loads and maintain accurate motion during starts, stops, and speed changes.

The motor’s flange width measures 142 mm, so it fits mounting interfaces standardized for medium frame sizes. During operation, its electronic commutation allows a rated mechanical speed of 3000 rpm, suitable for general-purpose positioning and cyclic drive tasks. If the rotor is prevented from turning, the windings can withstand a locked-rotor current of 10.6 Arms, and that current generates a stall torque of 14.5 Nm. For every ampere of phase current, the machine develops 1.37 Nm/A, which helps determine expected output under closed-loop current control.

Mechanical coupling is provided by a shaft that measures 24 x 50 mm, large enough for torsionally stiff clamping hubs or keyed connections. Overall length without an integral holding brake is 277 mm, allowing the motor to slide into tight machine bays while still accommodating the encoder stack. With a bare mass of 16 kg, the stator housing supplies thermal mass for short duty overloads without exceeding winding limits. The inertia seen by the drive, including the feedback encoder, is 30 ×10⁻⁴ kg·m², an important value when tuning acceleration ramps and jerk limits so the axis remains stable. Its compact body also helps in installations where guarding, cable routing, and nearby machine elements leave limited clearance around the axis.