Product Description:

The SF-A2.0020.030-04.000 is a brushless synchronous unit produced by Bosch Rexroth Indramat for the SF Servo Motors series. Designed for closed-loop drive systems, the motor converts electrical energy from a matching drive into regulated rotary motion for positioning tables, pick-and-place axes, and packaging machinery. Its flange mounting and front-face shaft interface allow direct coupling to gearheads or loads, making the device a compact actuation element in automated production cells.

At its continuous operating point, the rotor reaches a 3000 rpm rated speed, enabling moderate-velocity axes without gearbox multiplication. Generated torque scales linearly with phase current through a 1.5 Nm/A torque constant, simplifying current-loop tuning. During startup, the motor can produce a 2.0 Nm locked-rotor torque while drawing only 1.3 A, which limits drive sizing and still provides enough breakaway force for light loads. Position feedback is delivered by an 8 million increments per revolution incremental encoder, which supports sub-arcminute resolution across the full rotation. A combined rotor and feedback inertia of 3 × 10⁻⁴ kg·m² balances dynamic response against load matching, and the 217 mm overall length fits shallow cabinets. The housing follows the IM B5 construction code and uses a 95 mm j6 pilot to align the flange concentrically.

For holding functions, the built-in brake supplies 3.2 Nm of static torque and uses a 24 VDC coil, allowing direct connection to typical control power supplies. The assembly weighs 5.8 kg, so when mounted face-first it places only a modest load on machine frames while still helping reduce vibration. A permissible axial thrust of 70 N protects the bearings when belt tension or screw-driven thrust acts along the shaft. Power is transmitted through a 14 × 30 mm shaft secured by a Feather Key A5 × 5 × 25, providing slip-free coupling to pulleys or hubs.