Product Description:

Bosch Rexroth Indramat manufactures the SF-A3.0042.30-00.000 as part of the SF Servo Motors series. The unit is a permanent-magnet synchronous motor intended for tight position and velocity regulation when paired with a compatible Rexroth drive controller. By translating commanded phase currents into repeatable shaft motion, it supports automated feeders, gantry axes, and small transfer stations where high duty cycles and compact footprints are required. Its mechanical interface follows an IEC flange pattern, so it can mount directly to gearboxes or machine frames without adapter plates. This layout suits machines that need accurate starts, stops, and direction changes in limited installation space.

The motor has a rated speed of 3000 rpm, allowing the shaft to follow common servo motion profiles without saturating the magnetic circuit. A torque constant of 1.6 Nm/A links drive current to produced torque, which helps keep current-based control predictable. The locked-rotor current is 2.3 A, and the corresponding locked-rotor torque is 3.7 Nm, providing a clear reference for stall behavior. Rotor inertia is only 7 × 10⁻⁴ kg·m², so short acceleration and deceleration ramps can be carried out quickly in lightly loaded mechanisms. That low inertia also helps the motor respond promptly to changing position commands during indexing cycles.

The housing has an IP67 rating, and the shaft position is monitored by an STG absolute encoder with 8 million increments per revolution. The encoder tracks motion within ±20 arcseconds, supporting fine position feedback for repeatable axis movement. A flange diameter of 116 mm and a motor mass of 7.0 kg allow the motor to fit compact machinery without excessive mounting load. Additional mechanical data include a 223 mm overall length, a Ø19 × 40 mm shaft with feather key A6 × 6 × 32, and winding insulation sealed against humidity. The absolute encoder also preserves position information through power cycles, which helps reduce the need for repeated homing on suitable systems.