Product Description:

The SF-A2.0020.060-04.000 is a brushless servo motor produced by Bosch Rexroth Indramat for the SF Servo Motors series. It serves as a compact rotary actuator for automated machinery, converting drive current into motion while providing position feedback for closed-loop control in industrial automation cells. Its compact format is suitable for positioning axes that need fast response and accurate repeatability in limited installation space.

The motor reaches a rated speed of 6000 rpm, enabling rapid cycle times on high-speed axes. A torque constant of 0.74 Nm/A indicates how efficiently input current is converted into usable torque. During start-up, it draws a locked-rotor current of 2.7 A, which produces a locked-rotor torque of 2.0 Nm to overcome static system friction. Dynamic response is aided by a rotor inertia of 3 × 10^-4 kg·m², helping the axis accelerate quickly without excessive overshoot. The frame length is 217 mm, so the unit fits into narrow machine layouts, and the Ø14 × 30 mm shaft connects directly to couplings or gearheads. An encoder precision of ±20 arcsec supports tight position loops, and the output shaft carries a Feather Key sized A5 × 5 × 25 for positive torque transmission. When the brake coil is energized, it requires 0.56 A, which keeps control-supply loading low.

The holding system uses a supply of 24 VDC and sustains loads with 3.2 Nm of torque at 120 °C, allowing safe stoppage during power loss. Brake hardware adds only 0.4 × 10^-4 kg·m² of inertia and 0.35 kg of mass, so the added holding function has only a small effect on moving-axis response. Motion feedback is highly granular because the encoder resolves 8,000,000 incr/rev, permitting fine velocity interpolation. Overall motor weight is 5.8 kg, which keeps the load on moving assemblies moderate while still providing stable mechanical support during operation.