AM8551-0E11-0000 Beckhoff
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The Beckhoff AM8551-0E11-0000 is a standard version servo motor with a smooth shaft, part of the AM Synchronous Servo Motors series. It features a 104 mm flange size and a rotatable angular connector or terminal box. The motor is equipped with a 24 VDC holding brake and delivers holding torque from 9 Nm to 20 Nm depending on length.
Internal Product Review
The AM8551-0E11-0000 is a Beckhoff synchronous servomotor with increased mass moment of inertia and OCT single-turn feedback. A rotatable angular connector supports clean installation, while the 24 V holding brake adds dependable axis retention. Strong brake integration makes this model a very capable choice for stable servo applications.
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Product Description:
The AM8551-0E11-0000 is a synchronous servo motor produced by Beckhoff within the AM Synchronous Servo Motors series. As a compact rotary drive element, it converts electrical energy into regulated mechanical rotation for positioning tasks in industrial automation cells, handling units, and packaging equipment. Its role is to deliver precise torque and speed control when paired with compatible Beckhoff drive amplifiers and motion controllers. Closed-loop operation allows the connected drive to adjust motor output as axis loads and motion commands change.
This model mounts to machine frames with a 104 mm flange and belongs to a motor family with an increased mass moment of inertia. The higher inertia helps the shaft accommodate greater load-side inertia without sacrificing dynamic response. A smooth shaft simplifies coupling to gearheads or clamping hubs where keyed engagement is unnecessary. Depending on the stator length, the available holding torque ranges from 9 Nm to 20 Nm when power is off, which suits vertical or indexing axes that must resist back-driving. Winding code E indicates the motor’s electrical characteristics for drive selection. The unit has overall length code 1 and is supplied in the standard version, so its housing follows the base dimensions for this motor configuration.
The electromagnetic brake is a 24 V holding brake that engages automatically during power loss. This brake can secure a stationary load when the drive no longer supplies motor torque. Rotor position is reported through an OCT single-turn encoder, providing absolute feedback for closed-loop operation without battery support. Single-cable feedback communication reduces the number of separate connections required between the motor and drive. Power, brake, and feedback conductors exit through a rotatable angular connector or terminal box, providing flexibility when routing cables in confined machine spaces. The adjustable connection orientation also helps prevent excessive cable bending near the motor housing.
