Product Description:

Bosch Rexroth Indramat manufactures the SF-A5.0460.020-10.000 brushless servo motor as part of the SF Servo Motors series. This unit is designed for electrically commutated drive systems where rapid positioning and sustained feed forces are required on machining centers, packaging stations, or gantry axes. When paired with a matching digital drive, the motor delivers closed-loop torque and speed so that mechanical loads can be accelerated, held, or reversed in line with the programmed motion profile used in industrial automation cells.

Bearing and shaft construction allow the rotor to sustain an axial load of 380 N, enabling thrust transmission through ball screws without separate support cartridges. During startup, the machine controller can reference the axis at a rated speed of 2000 rpm, a value chosen to balance dynamic response with thermal limits on the 35 kg frame. If the shaft is prevented from turning, the electromagnetic design can develop 46 Nm of locked-rotor torque while drawing 21 Arms from the inverter, which indicates the minimum drive current capacity for stall events. A rigid square mounting interface with a 190 mm flange size aligns the stator to the machine bed and helps maintain concentricity under heavy side loads.

The motor has an enclosure rating of IP67, so contaminants and coolant splashes cannot reach the 383 mm stator core or the pre-lubricated bearings. Position feedback is handled by a single-turn STG encoder with a mechanical accuracy of ±20 angular seconds and a digital resolution of 8,000,000 increments per revolution, which permit tight servo loops even on finely pitched lead screws. With a torque constant of 2.2 Nm/A, the drive can predict output torque directly from measured phase current, which simplifies real-time diagnostics. Low rotor inertia of 166 ×10⁻⁴ kg·m² works with the 32 mm shaft to reduce overshoot during direction reversals.