Product Description:

The AM8553-0N11-9000 is a synchronous servo motor manufactured by Beckhoff. It converts controlled stator currents into repeatable torque for positioning tables, pick-and-place heads, and other motion segments in industrial automation. The unit uses flange and shaft geometry shared with AM3x5x compatible models. Its synchronous design supports precise rotor alignment for closed-loop speed and position control through drive-integrated algorithms. This operating principle helps the drive maintain repeatable motion during indexing, transfer, and other coordinated axis movements.

An electromagnetic holding circuit rated at 24 VDC powers the brake from a common control supply. The motor reports rotor position through OCT single-turn feedback, providing absolute position information within one revolution and eliminating homing cycles after power-up. Mounting uses a standard 104 mm square flange that aligns with common servo adapters and helps maintain concentricity. Its smooth shaft works with clamp couplings, which help minimize backlash during acceleration. Electrical terminations are housed in a rotatable angular connector or terminal box, so the cable exit can be turned to suit the installation direction without straining conductors.

The brake provides a retention capability of 9 Nm to 20 Nm, which supports axes with different static load requirements depending on the selected stator length. This AM855 variant is built with an increased mass moment of inertia rotor, making it suitable for conveyor rolls and other loads that benefit from smoother speed transitions. The frame’s dimensional index of 3 corresponds to the active stack length used for this motor size. The added inertia can improve speed stability where abrupt load changes would otherwise cause more noticeable variation. When supply power is removed, the brake engages immediately to help prevent drift on vertical or safety-critical axes.