Product Description:

The SF-A3.0042.030-00.050 is a synchronous servo motor produced by Bosch Rexroth Indramat and belongs to the SF Servo Motors series. This rotary unit converts controlled electrical power into proportional mechanical torque, allowing precise axis positioning in packaging machines, pick-and-place gantries, and other computer-controlled assemblies within industrial automation. Its synchronous design supports coordinated motion where repeatable speed and position control are needed across automated cycles.

Under forced ventilation the stator windings can deliver a continuous phase current of 3.4 A (rms), while natural convection limits steady-state draw to 2.8 A (rms). When excited at its rated frequency the rotor reaches 3000 rpm, a speed aligned to many servo drives that operate on 50/60 Hz power inputs. Torque generation scales linearly with armature current; the motor produces approximately 1.6 Nm/A, simplifying feed-forward calculations inside the drive controller. For feedback, the integrated optical encoder reports shaft position with an angular deviation no greater than ±20 arcsec, supporting tight velocity and position loops. A 116 mm square mounting flange and a Ø19 × 40 mm shaft interface match standard planetary gearboxes.

Startup and holding behaviors are characterized by a locked-rotor torque of 3.7 Nm that can be sustained with only 2.3 A of winding current, giving a high stall-torque-to-current ratio useful for static load clamps. The hollow rotor and rare-earth magnet assembly carry an inertia of 7 × 10⁻⁴ kg·m², enabling rapid acceleration without demanding excessive peak power from the drive. High-density feedback is also provided, and each mechanical revolution yields 8 million increments, allowing sub-micron linear resolution after gearing. These characteristics, combined with forced-air or passive cooling options, let machine builders tune cycle times without exceeding thermal limits on the windings.