Product Description:

The SF-A4.0091.030-10.050 is a brushless AC servo motor manufactured by Bosch Rexroth Indramat for the SF Servo Motors series. It converts drive current into regulated rotary motion for positioning axes, feeders, and indexing tables inside automated machinery. When paired with Indramat digital drives, the unit supplies fast transient response and repeatable motion profiles, supporting production lines where tight speed regulation and compact installation footprints are critical. Its brushless design also reduces routine wear at the motor itself, which helps maintain smooth operation in systems that run frequent start-stop cycles.

Mechanically, the motor uses IM B5 mounting, which places the 142 mm flange directly against a machine plate, and its Ø24 × 50 mm shaft transmits torque through standard clamping hubs. At the rated operating point, the rotor reaches 3000 rpm. During startup stall, it can develop 10 Nm while drawing 7.0 A of locked-rotor current. A length of 246 mm and an uncoupled mass of 13 kg help the motor fit into compact machine spaces without adding excessive overhung load. For continuous duty, the electromagnetic design provides a torque constant of 1.42 Nm/A, allowing the drive to estimate output torque from phase current with consistent linearity.

Dynamic behavior is supported by a rotor inertia of 21 × 10^-4 kgm², which balances acceleration capability with position stability when the axis is at rest. Thrust loads up to 154 N can be applied along the shaft without exceeding the bearing service limit, permitting use with ball-screw or rack drives that impose axial preload. Position feedback comes from a single-turn absolute encoder that delivers 8 million increments per revolution with an accuracy of ±20 angular seconds. This feedback allows the controller to correct small speed deviations quickly and maintain stable position holding after the axis reaches its target.