Product Description:

The SF-A4.0125.030-14.154 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. It converts regulated drive current into precise rotary motion for positioning axes, tool spindles, or conveyor sections in automated equipment. By combining permanent-magnet excitation with closed-loop feedback, the motor delivers steady torque across its working speed range and supports fast reversals in CNC, packaging, and general motion-control applications. This makes it suitable for axes that require repeatable positioning and stable speed regulation under changing load conditions.

At a rated speed of 3000 rpm, the motor can follow standard servo drive outputs without mechanical gearing. Its electromagnetic design provides a torque constant of 1.37 Nm/A, so each ampere generated by the inverter adds proportionally to shaft torque and supports predictable current control. During startup when the rotor is locked, the unit withstands a locked-rotor torque of 14.5 Nm and a locked-rotor current of 10.6 A, which helps match the motor to a drive with suitable overload capability. Dynamic motion is also influenced by the rotor inertia of 0.0030 kg·m², a comparatively low value that supports quick acceleration and deceleration without placing excessive demand on the coupling.

The holding brake integrated in the end bell delivers a torque of 18 Nm and is energized at 0.7 A from a 24 VDC supply, allowing safe static positioning after power removal. A square 142 mm flange follows the IM B5 mounting style and mates directly with precision gearboxes or machine frames. The enclosure is rated IP67, helping protect internal parts from dust and liquid ingress during operation. With a 324 mm body, a smooth 24 mm × 50 mm shaft, and a mass of 17.7 kg, the motor fits into compact machine spaces and can be coupled directly to standard hubs or gear inputs.