Product Description:

The MDD021B-N-100-N2K-032MB0 is a micro-frame servo unit manufactured by Bosch Rexroth Indramat for the MDD Synchronous Motors series. Designed for digital drive controllers, it converts regulated current into precise rotary motion for indexing tables, pick-and-place heads, and other compact axes. Its small format helps reduce moving mass in tightly spaced mechanisms where short travel times and repeatable positioning are important. It is also well suited to assemblies that place the motor near linear guides, tooling, or rotary tables with limited clearance.

Mechanically, the actuator reaches a rated speed of 10,000 rpm, allowing it to follow rapid position commands during short-cycle motion. At standstill, it produces 0.30 Nm of continuous holding torque, which suits light-duty positioning and small transferred loads. Accurate alignment to the machine frame is provided by a 32 mm centering diameter, and the rotor is balanced to a standard grade to help limit vibration at high speed. All power and feedback conductors leave the housing on side B through a sealed connector, which helps cable routing in space-restricted cabinets and leaves more room around the remaining faces of the motor.

Position data is supplied by an integrated absolute encoder that delivers multi-turn position information, while auxiliary monitoring is available through resolver feedback for stable speed and position evaluation. The output shaft uses a keyway interface so torque can be transferred securely to pulleys or miniature gearboxes without relying only on friction at the coupling. Because the motor is supplied without a blocking brake, vertical axes must rely on external locking devices or drive torque to hold position during power loss. The open shaft area should remain clean and dry so contaminants do not reach components that are not protected by a shaft seal.