Product Description:

The SD-B5.250.020-04.000 brushless servo motor is produced by Bosch Rexroth Indramat for the SD Magnet Motors series. It serves as a rotary actuator in automated conveyor sections, loaders, and indexing tables, turning drive commands into controlled mechanical torque. By combining permanent-magnet excitation with sensor feedback, the motor allows the connected controller to synchronize speed and position with minimal latency for repeatable motion in high-duty machine cells. The brushless design reduces electrical noise, extends service intervals, and supports continuous operation in multi-shift production. Its operating principle also supports accurate starts, stops, and dwell periods in positioning tasks.

The motor uses a flange of 116 mm, which matches medium-frame gearboxes and aligns the mounting holes with standard ISO layouts. Inside the stator, the magnets are made of Ferrite, so the rotor maintains stable flux without using rare-earth alloys. Under rated excitation, the shaft reaches 2000 rpm, giving a predictable velocity reference for position loops. The unit is supplied as basic equipment with a disk brake, allowing a fail-safe clamping function at the motor face. At zero speed, it can generate 25 Nm of electromagnetic torque for tension control or vertical axis support before motion begins.

The brake provides a holding torque of 36 Nm, allowing suspended loads to remain in place when the drive is de-energized. The keyed shaft uses a profile of ø 19 × 40 mm, so standard couplings and pulleys can be mounted without sleeve adapters or shaft machining. This shaft format supports direct mechanical connection in equipment that relies on fixed, positive torque transfer. The brake and shaft arrangement suit axes that must remain stationary at standstill and then transmit torque through a keyed coupling during startup.