Product Description:

The SF-A5.0250.020-14.000 is a servo motor in the SF Servo Motors series produced by Bosch Rexroth Indramat. Designed for automated machinery, the unit converts electrical drive current into controlled mechanical rotation so axes can be indexed, synchronized, or held at a commanded speed. Its construction combines a permanent-magnet rotor with an absolute encoder, enabling the drive to monitor shaft position in real time and apply precise current vectors during manufacturing, packaging, or material-handling cycles. Because the encoder is absolute, position information remains available without depending only on incremental pulse counting.

The motor has a rated speed of 2000 rpm, which is the continuous operating velocity available when the drive supplies nominal current. It develops a continuous holding torque of 56 Nm, so stationary loads can be supported without additional gearing. When the shaft is prevented from turning, the stator can deliver a locked-rotor torque of 23 Nm while drawing up to 10 A rms. Motion response is linked to the rotor inertia of 0.0083 kgm², which affects acceleration rates and overshoot. For each ampere of phase current, the electromagnetic circuit produces 2.3 Nm/A, giving a direct relationship between commanded current and output torque.

Mechanical integration is simplified by the 190 mm flange and a smooth shaft measuring 32 × 58 mm, allowing rigid coupling to standard gearboxes or timing pulleys. The housing length of 345 mm leaves room for the fail-safe brake, whose rotor adds only 0.0030 kgm² of inertia and is energized from a 24 VDC supply at 1.33 A. Position feedback travels through a size 1.25, 8-pin connector to convey single-turn absolute data, with the optical STG encoder delivering 8 million increments per revolution for tight loop resolution. A smooth shaft is commonly paired with a clamping hub or similar friction-based coupling when keyed torque transmission is not required.