Product Description:

The SF-A4.0172.030-14.056 is a servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. As a permanent-magnet synchronous unit, it converts drive current into precise mechanical rotation for positioning, conveying, and similar automation duties. The housing follows the IM B5 flange-mount pattern so the motor can be integrated directly onto machine frames without additional brackets or adapter plates. In closed-loop motion systems, the absolute encoder mounted on the rear face supplies position data to the drive controller, enabling repeatable starts without homing sequences after routine power cycles.

A holding brake develops 18 Nm of static torque and is energized at 24 VDC, allowing vertical axes to stay in place when power is removed. During operation, the windings are supplied from a shared DC bus rated at 670 VDC; this high link voltage supports fast torque buildup and minimizes current draw. With a rated speed of 3000 rpm and a torque constant of 1.38 Nm/A, the drive can predict output torque from measured current, which supports stable current-mode control. Sinusoidal back EMF reduces torque ripple, and the encoder supports multi-turn feedback for positioning tasks that require retained position information.

At startup, a locked-rotor current of 13 A is required to reach the corresponding locked-rotor torque during indexing sequences. The motor withstands mechanical shocks up to 6 g, which is useful for machinery exposed to rapid tool changes, pallet impacts, or other abrupt machine events. Acoustic emissions remain at 58 dB(A), so enclosure soundproofing is simplified in many installations. Two integrated temperature sensors, shown as 2 NTCs, feed thermal protection functions inside the drive and help prevent overheating during long cycles or when ambient airflow is restricted.