Product Description:

The MAC041B-0-BS-4-E/050-B-0/WI673LV is an AC servo motor belonging to the MAC AC Servo Motors series produced by Bosch Rexroth Indramat. Designed as the electromechanical element of a closed-loop axis, this unit converts commanded current into precise shaft rotation so that automated equipment can position tooling, convey parts, or index packaging lines within tight tolerances. Its compact stator and rare-earth magnet rotor give fast response while maintaining stable operation across continuous duty cycles. That response profile is useful in machines that require repeatable starts, stops, and short positioning moves without excessive overshoot.

Within the MAC041 mechanical family, the motor uses frame size 041, giving a compact housing diameter suited for medium-torque tasks, and frame length B, which indicates the active stack depth available for continuous power. Heat is removed by natural convection, eliminating the need for external blowers or liquid loops and simplifying panel layout. Power conductors reach the stator windings through a connector on side B, which keeps cabling on the rear of the machine and frees the front face for couplings or gearboxes. Rotor position is detected by an incremental encoder with standard mounting, and this feedback provides evenly spaced pulses that the controller counts to regulate speed and synchronize multi-axis motion. A 50 mm centering shoulder helps seat the housing accurately against the mounting face during installation.

Application flexibility is increased because the motor is supplied without a blocking brake, allowing the load to coast or be held by an external clamp when power is removed. For higher resolution or improved velocity-loop linearity, the motor supports incremental or absolute encoder tacho feedback from the same shaft, allowing direct changeover between control schemes as needed. As a motor for analog drives, it interfaces through voltage or current commands rather than fieldbus protocols, making it compatible with legacy Rexroth amplifiers and many third-party servo regulators. This layout also suits retrofit applications where the surrounding control hardware still uses conventional command interfaces. The absence of an internal brake reduces added rotating mass, which can help axes that prioritize quick acceleration and deceleration.