Product Description:

The SF-A4.0091.030-10.019 is a three-phase servo motor manufactured by Bosch Rexroth Indramat and assigned to the SF Servo Motors series. It provides closed-loop rotary positioning and speed regulation for automated axes and tool spindles in industrial machinery where repeatable starts, stops, and speed changes are required. Designed for use with matched drive controllers, the unit converts DC-bus power into mechanical rotation and supports feedback through an absolute encoder for precise motion control. This arrangement allows the controller to correct position and velocity deviations during operation.

The motor is fed from a DC bus of 670 VDC, which sets the electrical operating level for the connected drive system. Under nominal conditions, it reaches a rated mechanical speed of 3000 rpm, allowing direct coupling to gearless loads that require moderate velocity. With a torque constant of 1.42 Nm/A, each ampere of phase current produces predictable output torque for current-based control. When the rotor is locked, the windings can draw 7.0 A and produce a stall torque of 10 Nm. The smooth 24 mm × 50 mm shaft, rotor inertia of 21 × 10⁻⁴ kg·m², and overall length of 246 mm support stable acceleration in compact machine layouts.

Position feedback is supplied by an absolute encoder that delivers 8 million increments per revolution and maintains an accuracy of ±20 arcseconds, supporting fine interpolation for high-precision contouring tasks. A flange diameter of 142 mm aligns with standardized mounting interfaces, and the 13 kg housing can be fastened directly to drivetrain frames. The enclosure is rated IP67, allowing operation in areas exposed to coolant spray or airborne particulates while protecting the internal encoder electronics. This sealing also supports use in demanding industrial environments where moisture and dust are present.