Product Description:

The SD-B5.250.015-41.000 is a servo unit produced by Bosch Rexroth Indramat for the SD Magnet Motors series. As a brushless servo motor, it converts drive current into rotary motion without mechanical commutation, enabling precise closed-loop positioning and speed control on automated axes such as packaging stations, transfer units, or gantry drives. Within an automation cell, the motor works with a dedicated drive controller to deliver repeatable torque and stable velocity across a full duty cycle. Because the design does not rely on brushes, routine brush wear and debris associated with mechanical commutation are avoided, which helps keep motion performance consistent over time.

The motor uses a 116 mm mounting flange that mates with standard IEC gearbox faces and supports direct installation in common machine layouts. A rotor built with ferrite magnets produces the excitation field, and this magnet material maintains stable magnetic behavior through normal temperature changes during operation. At standstill, the motor provides 25 Nm of holding torque, which is useful for dwell periods, indexing steps, and other applications that require the shaft to remain in place between moves. Output torque is transmitted through a 19 × 40 mm straight shaft that supports keyed couplings and straightforward alignment with pulleys, pinions, or similar transmission components.

Continuous operation centers on a nominal speed of 1500 rpm, which suits common inverter frequencies in medium-torque applications and can reduce the need for very high gearbox ratios. The motor is supplied in a standard configuration without factory modifications, so the base construction remains consistent across comparable units in the product line. Its permanent-magnet design supports smooth response during repeated start-stop motion, and feedback devices such as Hall sensors or encoder systems can be used for commutation and closed-loop control. This arrangement makes the motor suitable for positioning tasks that require stable low-speed behavior as well as controlled acceleration and deceleration.