Product Description:

The SF-A5.0460.030-04.000 belongs to the SF Servo Motors series manufactured by Bosch Rexroth Indramat. It is a permanent-magnet servo unit intended for numerically controlled machine axes, where its integrated single-turn absolute encoder supplies position data without needing a homing routine. A built-in holding brake keeps the shaft fixed whenever the drive is disabled, enabling safe power-off clamping in packaging, printing, or metal-cutting equipment. This arrangement supports closed-loop positioning on axes that must return to operation without a reference move after a controlled stop or restart.

This motor reaches a rated speed of 3000 rpm, and every ampere of armature current generates 1.58 Nm/A of torque, allowing the drive to calculate force output directly from commanded current. When the shaft is blocked, the stator can draw up to 29 Arms, producing a stall torque of 46 Nm for static positioning or load testing. The rotor and encoder assembly present an inertia of 166 ×10⁻⁴ kgm², which affects acceleration profiles and drive tuning. Additional mechanical data include an admissible axial load of 380 N, a Ø32 k5 shaft supported by a 58 mm engagement length, and a DIN A10×8×50 feather key that transmits torque to the coupling without slip. Overall length with the brake fitted measures 428 mm, and these shaft dimensions support keyed couplings at the machine interface.

The electromagnetic brake supplies 56 Nm of holding torque, is released by a current of 1.33 A, and clears in 97 ms, so motion can resume quickly after a stop command. The complete assembly weighs 40.2 kg, which affects axis balancing and support structure design. Encoder precision is specified at ±20 arc-seconds with 8,000,000 increments per revolution. That level of resolution helps the drive maintain stable position feedback during indexing, holding, and low-speed motion.