Product Description:

The SG-B2.027.049-03.000 is a synchronous servo motor produced by Bosch Rexroth Indramat as part of the SG Synchronous Servo Motors series. It functions as a compact drive element in automated machinery, converting current from a servo amplifier into precise shaft rotation for indexing tables, pick-and-place axes, or light conveyor sections. An electrically released 24 V DC holding brake secures the load when power is removed.

The motor uses a 100 mm square mounting flange with accuracy grade N, allowing direct coupling to standardized gearheads without extra alignment plates. During operation, the shaft can reach a nominal speed of 5500 rpm, which is suitable for high-throughput positioning while keeping bearing loads within acceptable limits. At standstill, the electromagnetic system delivers 2.6 Nm of torque and draws a continuous phase current of 6.8 A; this combination establishes the thermal requirements for the drive controller. The housing has an IP65 rating, which blocks dust ingress and protects the motor against low-pressure water jets. A two-pole resolver returns rotor position to the servo amplifier for closed-loop control. The rotor inertia is 0.155 × 10⁻³ kg·m², providing a balance between quick acceleration and the damping of load disturbances.

The torque constant is 0.41 Nm/A, allowing output torque to be calculated from the commanded current through linear scaling. Axial forces up to 150 N may be applied to the Ø19 × 40 mm keyed shaft without exceeding bearing limits, and the 168 mm assembly length, including the brake, fits within compact enclosures. The motor has a total mass of 4.1 kg, so mounting it on a small-format gantry adds limited moving weight and helps preserve dynamic response.