Product Description:

The SF-A4.0172.030-10.000 is a servo motor built by Bosch Rexroth Indramat for the SF Servo Motors series. Designed as a rotary actuator for closed-loop industrial automation, the unit converts drive current into controlled angular motion so positioning tasks can be synchronized with a motion controller. It is suited for applications that require accurate speed and position control over repeated motion cycles.

It integrates a single-turn absolute (STG) encoder with an accuracy of ±20 angular seconds, allowing fine position feedback, while its measurement granularity reaches 8 million increments per revolution, so the drive can resolve fractions of a degree with minimal interpolation. The mounting interface follows a 142 mm square flange, providing a standardized face for coupling to gearboxes or machine frames. During stall conditions or emergency stops, the winding may draw up to 13 A and develop a stall torque of 18 Nm. During continuous operation, the stator produces torque in proportion to current at a constant of 1.38 Nm/A, which supports predictable speed-torque behavior across the servo's regulation range. The motor also uses a smooth shaft profile that suits shrink-fit couplings or clamp hubs rather than keyed joints.

The motor housing weighs 19 kg, a mass that adds thermal capacity during extended duty cycles. Overall active length is 309 mm, so space planning inside tight enclosures must also consider clearance for the rear connector, which is supplied without a mating plug. Under rated excitation, the rotor reaches 3000 rpm, allowing rapid positioning moves without exceeding bearing limits. Dynamic response is influenced by a rotor inertia of 40 × 10⁻⁴ kg·m², which balances acceleration capability with load stability. A 24 mm diameter, 50 mm long smooth shaft provides the mechanical output, and the mating connector must be sourced separately because it is not included with the motor.