Product Description:

The SD-B4.140.020-41.000 is a brushless servo motor produced by Bosch Rexroth Indramat within the SD Magnet Motors series. The unit is intended for electrically driven axes that require precise torque regulation and stable speed control in automated assembly lines, packaging machines, and material-handling stations. By combining permanent-magnet excitation with electronic commutation, the motor delivers repeatable motion without the maintenance associated with brush systems. When paired with a compatible drive, it supports accurate positioning and steady rotary performance in continuous-duty industrial applications.

At standstill, the rotor can deliver 14.0 Nm of torque, allowing the drive controller to apply holding torque at zero speed. Once energized, the motor reaches a nominal speed of 2000 rpm, which provides a clear operating point for matching the motor to the drive. Integration is handled through a square mounting interface that measures 142 mm across the flange, so the motor can be mounted directly to compatible gearboxes and machine plates. Magnetic flux is supplied by Ferrite segments embedded in the rotor, providing stable field strength for industrial duty. Power is transmitted through a splined shaft with an external diameter of 24 mm, giving adequate cross-section for torque transfer while still fitting compact couplings.

The usable shaft engagement length of 50 mm provides ample contact for rigid hubs and helps reduce fretting during cyclic reversal. Bosch Rexroth Indramat classifies this configuration under the internal code B4, which identifies the assigned mechanical frame and winding combination for this motor type. The motor is supplied in its baseline form without additional feedback devices, seals, or brake components. This layout allows the device to fit into multi-axis cells where a single motor can be connected to a dedicated drive channel without hardware changes.