Product Description:

The SF-A4.0125.030-00.050 is a servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. Engineered for closed-loop control, it integrates into drive systems that require accurate angular displacement and rapid velocity changes. In automated assembly lines, high-throughput packaging equipment, and material handling stations, the unit delivers regulated rotary motion that aligns mechanical loads with programmed motion profiles and cycle-time constraints. This makes it suitable for coordinated motion tasks where stable positioning and repeatable cycle timing are required.

Its magnetic circuit is permanently excited, and the stator-rotor interaction generates a sinusoidal back electromotive force that simplifies current control. This also helps reduce harmonic losses in the inverter stage and supports smoother torque production across the speed range. The drive’s DC bus must supply 670 V, which supports a rated mechanical speed of 3000 rpm without field weakening. With a torque constant of 1.37 Nm/A, each ampere of phase current produces proportional shaft torque, while a locked-rotor torque of 14.5 Nm supports startup under static load. The housing has an IP67 protection rating, and an absolute encoder returns position data immediately after a power cycle.

The unit draws a locked-rotor current of 10.6 A when the shaft is held, so the drive must supply this current briefly during indexing or emergency stops. Acoustic emission remains below 58 dB(A), which helps limit noise in production areas, and the assembly withstands shocks up to 6 g for use on high-impact transfer lines. Two NTC thermal sensors embedded in the windings send temperature data to the controller, allowing current reduction before insulation temperatures rise too far during rapid cycling. A flange mounting layout coded IM B5 simplifies direct coupling to gearheads or load discs and supports secure face mounting on machine structures.