Product Description:

The MAC025A-0-WS-4-E/040-A-0/WI668LV is an AC servo motor produced by Bosch Rexroth Indramat for the MAC AC Servo Motors series. It is intended for analog drive axes that demand accurate velocity and torque control in compact machinery, such as tabletop positioning stages or light assembly actuators. The permanent-magnet design, combined with closed-loop sensing, supports repeatable motion profiles while retaining compatibility with legacy analog amplifiers used throughout industrial production cells.

Its WS winding code indicates stator electrical characteristics that allow the paired drive to deliver rated current without magnetic saturation. The A frame designation establishes the flange diameter and shaft geometry, allowing the motor to fit the smallest housing offered in this series. The 025 length code indicates the stack height, which influences continuous torque and moment of inertia. Cooling relies on natural convection, with heat dissipating through the aluminum frame to eliminate the need for fans and support enclosed installations. Power conductors are routed through a connector on side A, allowing low-profile cable runs when the motor is mounted against flat panels or gear reducers.

The position loop is closed by a standard-mounted incremental encoder that emits A/B/Z channels for position and velocity feedback. The rear cover can also support tacho feedback with an incremental or absolute encoder when higher resolution or multi-turn position data are required. The device is categorized as a motor for analog drives, and its signal levels are compatible with traditional multi-loop servo amplifiers. Because the motor has no blocking brake, vertical or suspended loads must be secured by an external clamp or held with drive torque during shutdown. The absence of a brake also reduces rotating mass, supporting rapid acceleration in compact positioning applications.