Product Description:

The SG-B3.100.029-10.010 is a brushless servo motor manufactured by Bosch Rexroth Indramat for the SG Synchronous Servo Motors series. It converts controlled electrical current into precise shaft rotation, allowing CNC machines, handling robots, and automated tooling to position loads quickly and repeatably without mechanical backlash. A resolver mounted on the rotor supplies absolute position feedback to the drive, so closed-loop control can correct dynamic errors in real time.

At standstill, the motor delivers 11.2 Nm of torque while drawing 15.6 A; these linked values establish its static load-holding capability and the continuous current that the drive must supply. A torque constant of 0.73 Nm/A allows output torque to be calculated directly from the commanded phase current. Under rated excitation, the rotor can reach 3500 rpm, providing a wide speed range for positioning and traverse moves. The laminated rotor carries SmCo permanent magnets and has an inertia of only 0.80 × 10⁻³ kg·m², so acceleration ramps remain short while motion stays stable. Mechanical coupling is provided through a smooth shaft measuring 24 mm in diameter and 50 mm in length, seated in a metallic housing with accuracy grade R flange surfaces. The brushless resolver eliminates contact wear, and the 195 mm overall motor length accommodates compact machine frames.

The motor uses a 140 mm mounting interface, and its flange diameter of 140 mm matches IM B5 mounting patterns while also permitting IM V1 or IM V3 installation. The IP65 enclosure protects the stator from dust and water jets, allowing operation at ambient temperatures from 0 °C to 40 °C without additional gasketing. Thermal radiation and natural convection remove heat from the housing, while Class F insulation withstands the resulting winding temperatures. The shaft accepts an axial load of up to 200 N, supporting applications that place thrust on the motor bearings. The motor weighs 9.9 kg, which limits the additional load placed on linear axes and supporting machine structures. The motor has no holding brake, so external clamping must retain the shaft position when power is removed.