Product Description:

The SG-A3.0055.049-00.000 is a brushless servo motor produced by Bosch Rexroth Indramat within the SG Synchronous Servo Motors series. Intended for cyclic positioning and speed-control tasks in industrial automation, the unit converts electrical energy into precisely regulated torque for machine axes. The motor operates on permanent-magnet synchronous principles, giving it a rapid dynamic response suitable for packaging, metal-cutting, and material-handling equipment.

The motor operates in ambient temperatures from 0 to 40 °C, allowing full rated output without auxiliary cooling in typical plant environments. Heat dissipation relies on thermal radiation and natural convection, so no forced-air blower or liquid circuit is required. This cooling method simplifies cabinet layout and reduces maintenance. Standard construction follows the IM B5 face-mount pattern, while vertical IM V1 or IM V3 orientations are also permitted, providing flexibility when integrating the motor with gearboxes or machine frames. Rotor position and speed are measured by an integrated resolver, which provides analog sine-cosine signals that the drive converts into an absolute electrical angle for closed-loop control. A 140 mm square flange establishes the frame size and bolt pattern for mechanical attachment.

Thermal endurance is supported by Class F winding insulation according to VDE 0530, allowing conductor temperatures up to 155 °C during transient overloads. The rotor uses SmCo permanent magnets, whose high coercivity maintains magnetic flux at elevated temperatures and resists demagnetization during peak current events. The enclosure has an IP65 protection rating, blocking dust ingress and low-pressure water jets so the motor can be mounted on open machines without an additional housing. Torque is transmitted through a keyed shaft with a diameter of 24 mm and a length of 50 mm, accommodating standard couplings while keeping the overhung load within the limits of the integrated bearings.