Product Description:

The SF-A4.0230.030-04.050 is a rotary servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. It is intended for high-precision positioning and velocity control in automated machinery, where closed-loop feedback from its integrated encoder lets a drive regulate torque and speed with minimal error. By integrating a permanent-magnet rotor, a holding brake, and an IP-rated housing, the motor provides a compact electromechanical actuator that can be mounted directly to an axis without intermediate transmission components.

The electromagnetic brake is energized with 0.7 A at 24 VDC, and it delivers a static holding force of 18 Nm to keep the load in place when power is removed. Position data is supplied by an optical encoder that provides 8 million increments per revolution, enabling tight positional accuracy throughout the speed range. During a stalled condition, the winding draws up to 14 A, a current that pairs with the 1.57 Nm/A torque constant to generate immediate startup torque while the drive monitors thermal limits. The rotor inertia of 54 × 10⁻⁴ kg·m² balances dynamic response with load stability, and the 4 × 2.5 mm² motor cable cross-section supports continuous current delivery with low voltage drop.

For brief overloads, the locked-rotor torque reaches 22 Nm, aided by the Feather Key A8 × 7 × 40 that secures the shaft to couplings. The overall housing length is 388 mm, and the shaft measures 24 × 50 mm for direct coupling to medium-frame gearboxes. An enclosure rating of IP67 protects internal components from dust ingress and temporary immersion, making the unit suitable for washdown zones. At the rated speed of 3000 rpm, the motor handles continuous duty cycles, while its total mass of 23.7 kg provides mechanical damping for vibration-sensitive installations.