Product Description:

The SG-B3.055.049-03.000 is a brushless servo motor manufactured by Bosch Rexroth Indramat as part of the SG Synchronous Servo Motors series. Its metallic construction, IP65 sealing, and heat removal through thermal radiation and natural convection allow direct machine mounting without an additional enclosure. A small integrated holding brake secures the shaft while power is off, making the unit suitable for position-critical axes in automated material-handling or assembly equipment.

The rotor reaches a nominal speed of 4800 rpm, supporting fast cycle times in high-throughput stations. At standstill, the motor can deliver 5.8 Nm of static torque while the windings draw 13.4 A. The brake is energized by 24 V DC ±10%. This low-voltage line can be supplied by common control power sources, allowing the brake to operate independently of the motor power stage. Mechanical alignment follows the IM B5 face-mounting pattern, with IM V1 and IM V3 orientations also permitted. Flange positioning conforms to Accuracy N, supporting consistent alignment with connected equipment. Resolver feedback provides rotor angle and speed data to the drive for closed-loop motion control. A keyed shaft conforming to DIN 6885 has a 24 mm × 50 mm format and transfers torque to pulleys, couplings, or ball screws.

The permitted operating temperature range is 0 to 40 °C, which is suitable for typical industrial environments. A flange diameter of 140 mm distributes housing stresses and provides a rigid interface for gearboxes or mounting plates. The motor uses SmCo samarium-cobalt magnets, which resist demagnetization at elevated winding temperatures. The windings use Class F insulation to withstand the temperatures associated with continuous operation. The sealed housing helps prevent dust and water from reaching the internal windings, feedback components, and bearings during machine operation. Natural convection transfers heat from the housing to the surrounding air without requiring a fan or liquid-cooling circuit.