Product Description:

The SF-B4.0230.030-10.056 is an AC servo motor produced by Bosch Rexroth Indramat within the SF Servo Motors series. As a compact rotary actuator, the unit converts controlled electrical power into precise mechanical motion for positioning and velocity loops in automated production lines, packaging machinery, and material-handling axes. This type of motor is suited to applications that need repeatable starts, stops, and controlled speed changes during normal machine cycles. Its mechanical interface follows the IM B5 construction code, allowing front-flange mounting directly to gearboxes or machine frames, which reduces alignment work during installation.

The stator windings are optimized for a rated shaft speed of 3000 rpm, giving the drive a constant operating point that matches most standard inverter output frequencies. During startup, when the rotor is held, the motor can generate 22 Nm of locked-rotor torque while drawing a peak current of 14 A; these values indicate the breakaway capability against static loads. Internal copper losses are supplied from a common DC bus that sits at 670 V, so compatible drive controllers must provide this link voltage to achieve full performance. Continuous heat is removed by forced-air cooling that directs airflow along the housing ribs to keep the winding temperature below its insulation class limit. The torque constant is 1.57 Nm/A, so the inverter can estimate mechanical output from phase current feedback and support closed-loop current regulation. That relationship helps the drive respond predictably when commanded torque changes under varying load conditions.

An absolute position loop is supported through the built-in absolute-value encoder system, eliminating homing moves after power cycling. The machined centering pilot of Ø130 j6 ensures coaxial alignment with the target machine flange, while the mounting face diameter of 142 mm provides a standard bolt circle for rigid clamping. These mounting surfaces help maintain shaft alignment and reduce coupling stress during operation. Power is transferred through a stepped shaft of Ø24 k5, sized for common keyed couplings. Bearing lubrication intervals align with a minimum life expectancy of 20,000 hours, so the motor can run across multiple shifts without service interruption.