MDD025A-N-100-N2K-040MA0
The MDD025A-N-100-N2K-040MA0 is a compact synchronous servo unit manufactured by Bosch Rexroth Indramat within the MDD Synchronous Motors series. Classified as a motor for digital drive controllers, it converts electrical commands from an inverter into precise rotary motion for positioning axes, feeders, and small transfer stations in automated machinery. The motor follows the 025 size platform and length code A, giving it a short body suited for tight machine layouts, while the standard housing and balancing grade support installation inside enclosures without special vibration isolation. Its compact format is well suited to small servo axes where space is limited and low moving mass is important.
At stall, the rotor develops 0.33 Nm of continuous torque, so gear stages or direct-coupled loads can be matched to the winding thermal limit during steady holding duty. When energized with rated current, it can reach a nominal speed of 10000 rpm, providing high cycle rates for lightweight mechanisms. The centering shoulder measures 40 mm in diameter, establishing the reference surface for flange mounting and concentric alignment with driven components. Power and feedback leads exit on Side A, and the motor uses a single-piece connector interface that keeps cabling compact. This arrangement helps simplify routing where access is limited around the motor body.
Position data is generated by the integrated absolute encoder, so the axis can report position immediately after power returns. Coarse velocity control is augmented by the internal resolver feedback channel used by many legacy drives. Mechanical transmission is handled through a shaft with a keyway, and there is no secondary shaft extension on side B. The motor is supplied without a shaft seal, so it should be installed where oil or coolant cannot reach the bearing journal. Because it does not include a blocking brake, static load holding must be provided by the drive or by external clamps. This combination is appropriate for clean, compact motion applications that do not require a sealed shaft or an integral holding brake.
