AM257L-0001 Beckhoff
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The Beckhoff AM257L-0001 is part of the AM Synchronous Servo Motors series and features a flange size of 194 mm with a smooth shaft design. It has a two-pole resolver feedback type and an increased mass moment of inertia. The servo motor comes equipped with a 24 V holding brake and provides a holding torque of 70 Nm.
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Product Description:
The AM257L-0001 is a synchronous servo motor built by Beckhoff within the AM Synchronous Servo Motors series. This motor is intended for closed-loop motion axes where precise torque delivery and position control are required in industrial automation cells, packaging stations, or material-handling gantries. By combining permanent-magnet excitation with electronic commutation, it converts drive current into repeatable rotary movement that can be coordinated by a CNC or PLC. That operating principle supports accurate acceleration, deceleration, and settling behavior during repeated machine cycles.
The coil circuit for the motor’s parking brake is rated at 24 VDC, so the brake can be powered directly from common control supplies. A two-pole resolver is mounted on the rear shaft to send rotor angle feedback to the drive, allowing high-bandwidth velocity and position loops without digital encoders. The mounting interface follows a 194 mm square flange pattern, giving sufficient surface area for rigid coupling on larger gearboxes or machine plates. The holding system can resist up to 70 Nm before motion begins, which helps support vertical loads during idle periods. The rotor and winding set use an increased mass moment of inertia design, which can smooth acceleration profiles and reduce speed ripple when the axis is driven by high-gain controllers.
A factory-installed holding brake clamps the shaft whenever supply power is removed, preventing drift on gravity-loaded mechanisms. The output end uses a smooth shaft, making it compatible with clamp hubs or shrink disks where backlash must be minimized. This shaft style supports direct coupling arrangements that rely on friction-based connections rather than keyed transmission parts. It also helps maintain precise torque transfer when the axis starts, stops, and reverses direction.
