AM8021-4BH0-0000 Beckhoff
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The Beckhoff AM8021-4BH0-0000 is part of the AM Synchronous Servo Motors series and features a 58 mm flange size with a smooth shaft and radial shaft-sealing ring rated at IP65. The servo motor has a 24-bit OCT multi-turn feedback system and is built to SIL 2 safety integrity level. It includes a rotatable angular connector or terminal box for connection and does not include a holding brake.
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Product Description:
The AM8021-4BH0-0000 is a synchronous servo motor manufactured by Beckhoff for the AM Synchronous Servo Motors series. As a standard member of this series, the unit delivers precise torque and position control for industrial automation axes that rely on compact, high-performance rotary drives. It is intended to work with Beckhoff drive controllers and provide closed-loop feedback through an absolute encoder so that motion sequences remain coordinated during operation.
Several features shape the motor’s mounting, feedback, and safety profile. A flange diameter of 58 mm aligns the housing with IEC size-58 gearheads and machine plates, while the encoder reports position with 24-bit resolution to support fine interpolation at the drive. Position information is delivered through an OCT multi-turn system, which eliminates the need for external batteries during power cycles. Cabling can be routed from a rotatable angular connector or a terminal box, allowing the conductors to be oriented in the most accessible direction. Functional safety is addressed with certification at SIL 2, enabling integration into safety-related stop or limited-speed functions without additional sensors.
The mechanical interface is supplied without a holding brake, which suits applications where static load retention is handled by the drive or by external mechanics. A smooth shaft eases coupling to zero-backlash clamps, and the front bearing is protected by a radial shaft-sealing ring with IP65 protection so that lubricants and dust do not penetrate the interior. A sealing air connection is also provided to purge fine particles from the gap between the stator and rotor. The overall length code is 1, indicating the shortest housing in the AM8021 frame, and the motor is supplied in the standard series type and version. Electrical characteristics follow winding code B, which gives the motor a specific voltage constant and current demand for system sizing.
