Product Description:

The SF-A4.0091.060-10.050 is a brushless synchronous servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. It is intended for industrial automation axes that require repeatable velocity and position control over extended duty cycles. The motor interfaces with a Rexroth drive that uses high-speed feedback from its integrated encoder, allowing the controller to command incremental moves or continuous rotation with minimal lag. Its housing and bearing set are designed for dynamic operation in production cells and conveyor systems.

Under nominal conditions, the rotor reaches a rated speed of 6000 rpm, enabling rapid indexing on short-stroke axes. Torque is generated at a constant of 0.65 Nm/A, so every ampere from the inverter produces proportional mechanical output. The associated DC link accepts 670 VDC, matching the high-voltage bus of Rexroth multi-axis platforms and minimizing current draw. During a stall, the stator can handle a locked-rotor current of 14 A, delivering a starting torque of 9.1 Nm for overcoming static friction without demagnetizing the magnets. The laminated rotor carries 21 × 10⁻⁴ kg·m² of inertia, balancing quick response with stable running.

For axial loading, the output shaft tolerates up to 154 N, permitting belt tension or vertical loads without extra thrust bearings. Position feedback is provided with an encoder resolution of 8 million increments per revolution and an accuracy of ±20 arcseconds, making the motor suitable for rigid electronic gearing or contouring tasks. Two integrated NTC temperature sensors communicate winding heat to the controller for thermal foldback. The housing carries a protection rating of IP67, so dust ingress and temporary immersion do not affect service life, provided the radial seal remains intact.