Product Description:

The SF-A1.0023.060-04.050 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. It is intended for closed-loop positioning and velocity regulation in industrial automation systems where accurate, repeatable rotary motion is required. By combining a permanent-magnet rotor, stator windings, a feedback device, and an electromagnetic holding brake in one frame, the unit converts controlled current from a drive into proportional mechanical torque for machinery axes. This arrangement supports compact axis designs where motion control and load holding must be handled within the same motor body.

The motor reaches a rated speed of 6000 rpm, allowing high cycle frequencies in pick-and-place gantries and other fast indexing equipment. Continuous drive capability at that speed is backed by a holding torque of 2.0 Nm, which helps the axis resist disturbance when it is stationary. Torque rises linearly with current according to a constant of 0.69 Nm/A, making the current-to-torque relationship straightforward for the drive. Position feedback is supplied by an STG encoder with 8 million increments per revolution, supporting very fine motion resolution. Mechanical mounting uses a flange pattern of 70 mm, which keeps the motor compact while providing a stable interface to the machine. Rotor inertia is 1.20 × 10⁻⁴ kg·m², and stall conditions produce a locked-rotor current of 3.3 A with a locked-rotor torque of 2.3 Nm. The shaft measures 11 mm in diameter and 23 mm in length, and the electromagnetic brake coil requires 0.4 A during engagement.

For accurate centering inside gearheads or couplings, the motor nose has a pilot diameter of 60 mm. Axial loads up to 33 N can be transferred without exceeding bearing limits, which suits moderate thrust duties such as ball-screw preload. When power is removed, the spring-applied brake clamps at a control line of 24 V DC, keeping the axis locked until drive enable is restored. The overall length of 311.5 mm provides the internal space needed for the windings, feedback device, and brake assembly while still fitting installations where axial space is limited.