Product Description:

Bosch Rexroth Indramat builds the SD-B4.140.020-04.000 in its SD Magnet Motors series, positioning this unit as a compact servo motor for industrial automation axes. The motor uses a brushless design, allowing maintenance-free commutation and consistent torque delivery over long duty cycles. It is used to position tooling, conveyors, or pick-and-place heads when precise closed-loop control and integrated braking are required. By combining its magnetic rotor with an external feedback device, the motor supports accurate velocity and position regulation across automated machinery. This arrangement allows smooth response during indexing, speed changes, and repeated start-stop cycles in packaging, handling, assembly systems, and automated cells.

At a nominal speed of 2000 rpm, the rotor can follow reference commands while remaining within the thermal limits of typical servo applications. The available torque at standstill is 14.0 Nm, providing sufficient holding force against static loads before motion begins. Once stopped, the spring-applied brake secures the shaft with a holding torque of 9.5 Nm, which helps prevent drift when power is removed. Mechanical mounting uses a square flange measuring 142 mm, simplifying interchange with other IEC-sized actuators. Power is transmitted through a cylindrical shaft with dimensions of 24 × 50 mm, providing a clear journal size for couplings or gear fitment.

The configuration is listed as basic equipment with a disk brake, so the motor includes a preinstalled friction element that engages automatically whenever control voltage is absent. Rotor excitation relies on Ferrite magnets, a material that provides stable flux without rare-earth content. As a brushless servo motor, coil energization is handled by an external drive, eliminating brush wear and electrical arcing in sensitive environments. No special adaptations are indicated, so the standard version can be selected without optional seals, sensors, or alternate coatings.