MDD071B-N-040-N2M-095PB1
The MDD071B-N-040-N2M-095PB1 is a permanent-magnet synchronous motor produced by Bosch Rexroth Indramat for the MDD Synchronous Motors series. Classified as a motor for digital drive controllers, it translates commanded current into repeatable shaft rotation in assembly robots, indexing tables, and material-handling axes. This operating role suits compact automation equipment where repeatable positioning is required through frequent cycle changes. The model combines a standard housing with internal balancing, so it can be mounted in compact machine frames without additional vibration dampers. A factory-installed blocking brake prevents drift when power is removed, which supports vertical or suspended loads during routine stops.
The mechanical interface uses a centering diameter of 95 mm, which allows precise pilot seating against gearbox or flange surfaces. Power and feedback cabling exit on Side B, and the circular Connector system keeps the connection compact in cramped cabinets. At standstill, the motor delivers a continuous torque of 4.4 Nm, supplying steady holding force for indexing operations. When driven by a matched inverter, it can reach a nominal speed of 4000 rpm, which suits mid-range linear velocities on belt or ball-screw stages. Standard housing and shaft sealing protect the internal windings from ambient dust or coolant mist, while the length code B and 071 frame size keep overall mass low for high dynamic response.
Position accuracy is maintained by an integrated multi-turn absolute encoder that returns shaft angle data over the drive’s digital servo feedback (DSF) channel, eliminating the need for external reference switches after power cycles. That feedback path also lets the control loop monitor axis motion during acceleration, dwell, and braking. During a commanded stop, the blocking brake supplies 3.0 Nm of torque to secure the axis, allowing the electronic amplifier to be disabled without mechanical creep. The ground shaft has a keyway for positive coupling to pulleys or couplings, and its single-ended design leaves the rear free for the side-B connector arrangement.
