Product Description:

The SD-B4.140.020-10.000 is a servo motor built by Bosch Rexroth Indramat within the SD Magnet Motors series. Intended for precision positioning and speed control, the unit forms the rotary element of CNC stages, pick-and-place arms, and conveyor indexing stations. Its electronically commutated design works with Indramat digital drives to provide tightly regulated torque and smooth velocity profiles, allowing automated machinery to maintain cycle accuracy and repeatability under varying mechanical loads. Because the drive controls current and commutation in real time, the motor can respond quickly during repeated starts, stops, and direction changes. That behavior is useful on machines that must synchronize motion with sensors, actuators, or upstream process timing.

The motor attaches to mounting plates through a flange diameter of 142 mm, which provides a fixed reference surface for axial alignment. Output torque is transmitted by a shaft that measures Ø 24 × 50 mm, a geometry that supports standard clamp or collet couplings. The shaft size also provides enough contact area for secure torque transfer when the coupling is properly matched to the load. Magnetic excitation relies on Ferrite material, which offers stable field strength over a wide temperature range. During continuous operation, the rotor settles at a nominal speed of 2000 rpm, matching moderate-speed axis requirements without forcing excessive reduction ratios. A standstill torque rating of 14.0 Nm allows the drive to hold loads at zero speed when the controller supplies rated current.

The motor is supplied as Basic equipment. Its shaft is without keyway, and the frame is delivered without brake, so torque transmission and load holding depend on the selected coupling and control arrangement. As a Brushless servo motor, it uses electronic commutation through feedback signals, which eliminates brush maintenance and reduces electrical noise inside control cabinets. Because there are no brushes to wear, routine mechanical service on the commutation system is reduced compared with brushed motor designs. This layout is suitable for systems that already handle holding and stopping functions through the drive or separate mechanical components.