Product Description:

The SD-B3 031 030-10.000 is produced by Bosch Rexroth Indramat for the SD Magnet Motors series. It is a brushless servo motor intended to deliver precise, feedback-controlled rotation in industrial automation lines, allowing motion controllers to regulate tool heads, conveyors, or indexing tables with repeatable accuracy. The motor pairs with Rexroth digital drives to form a compact axis package that operates from DC-link supplied inverters and eliminates brush maintenance, supporting high cycle counts in continuous duty.

Electrically, the rotor reaches a nominal speed of 3000 rpm when the controller supplies sinusoidal current at the rated frequency. At standstill, the motor can hold a load with 3.1 Nm of torque while drawing 3.25 A, and its torque constant is 0.96 Nm/A. During acceleration, the phase current may rise to 13.0 A, giving the axis extra torque without exceeding the thermal limits set by the 6.7 Ω winding resistance. The phase inductance of 40.0 mH helps suppress current ripple, and the 1.55 × 10⁻³ kg·m² rotor inertia affects dynamic response. A voltage constant of 130 V/1000 rpm indicates the back EMF the drive must overcome to maintain commanded velocity.

Mechanical integration is simplified by a square flange measuring 116 mm and an overall housing length of 310 mm, dimensions that allow direct mounting to gearboxes or machine frames. At a service weight of 13 kg, the unit adds moderate mass to the machine assembly, and the smooth 19 × 40 mm shaft transmits power without a keyway, matching the basic equipment configuration that also omits an internal brake. The stator is wound around permanent magnets made from Ferrite, a material that resists demagnetization at elevated temperatures. Sealing to the IP54 standard protects internal windings from dust ingress and splashed fluids.