Product Description:

The SD-B3.D70.030-14.000 is a brushless servo motor manufactured by Bosch Rexroth Indramat for the SD Magnet Motors series. Designed for machine tools, pick-and-place stations, and automated conveyors, the unit uses ferrite permanent magnets to generate consistent flux while the stator windings convert electrical energy into rotary motion. Through closed-loop feedback, the motor supplies tightly regulated torque and speed for precise positioning tasks in industrial automation.

This model reaches a nominal speed of 3000 rpm, allowing direct coupling to fast-moving loads without intermediate gearing. During acceleration, its drive electronics may call for a peak current of 30.0 A, which must be supplied by the servo amplifier to use the motor’s dynamic capacity. At standstill, it can deliver 7.0 Nm of torque, and the rotor inertia of 5.88 × 10⁻³ kg·m² supports stable response during speed changes. A torque constant of 0.93 Nm/A links controller current commands to mechanical output, while a phase resistance of 1.86 Ohm contributes to copper losses and influences thermal rise. The 18.7 mH winding inductance affects current ripple, and the ferrite magnet circuit fits inside a 116 mm flange that mates to standard IEC brackets. Mechanical power is transferred through a keyed shaft with a 19 mm diameter and 40 mm length, and the motor body, excluding the brake, weighs 23 kg with an overall length of 366 mm.

A holding brake rated for 9.5 Nm engages at 24 V DC to secure vertical loads when power is removed, and the generated back EMF follows a voltage constant of 137 V/1000 rpm, which helps with drive matching. Thermal equilibrium is slow because the laminated core and housing have a thermal time constant of 120 min, so intermittent overloads can be tolerated before steady-state temperature is reached. Environmental protection meets the IP54 standard, guarding against dust ingress and water spray.