AM8553-0G21-0000 Beckhoff
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The Beckhoff AM8553-0G21-0000 is part of the AM Synchronous Servo Motors series and features a flange size of 104 mm with a smooth shaft design. It has an OCT multi-turn feedback type and includes a 24 VDC holding brake with a holding torque ranging from 9 Nm to 20 Nm depending on the motor length. The connection options are a rotatable angular connector or terminal box, and this version is built with an increased mass moment of inertia.
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Product Description:
The AM8553-0G21-0000 is a synchronous servo motor manufactured by Beckhoff within the AM Synchronous Servo Motors series. It serves as an electromechanical actuator that converts drive-controller current into tightly regulated torque and speed, making it suitable for pick-and-place heads, indexing tables, and other industrial automation axes that require repeatable position control. Power, feedback, and brake conductors enter through a rotatable angular connector or terminal box, so the cable exit can be aligned with the machine’s cable routing. This connection arrangement reduces cable strain and allows the motor to fit into confined equipment layouts without requiring sharply bent conductors.
The integrated holding brake is energized at 24 VDC, allowing it to be powered directly from common control supplies while preventing shaft movement when power is removed. This brake provides static load support for vertical or incremental axes that must remain stationary during a controlled stop. Rotor position is monitored by an OCT multi-turn encoder, which provides absolute position information across multiple revolutions and allows the drive to determine the shaft position after startup. The motor fastens to compatible gearboxes or machine plates with a 104 mm square flange that follows IEC sizing conventions and supports accurate mechanical alignment. Winding code G identifies the phase resistance and inductance values used to configure compatible drive controls.
Continuous stall capability ranges from 9 Nm to 20 Nm, depending on the selected stack length, allowing the motor configuration to accommodate different inertia and load demands. The motor series offers an increased mass moment of inertia rotor, which supports stable control of high-inertia loads by reducing rapid speed changes and overshoot. The mechanical depth uses overall length code 3, indicating the third housing extension available for the 85-frame motor design. A smooth shaft transmits torque without a keyway, making it suitable for clamp-style couplings and minimizing stress concentrations along the shaft surface. This shaft design also provides an even exterior surface that is easier to integrate into machinery used for food processing and packaging applications.
