Arrowmax AM-492023 4.0 X 90MM Arm Reamer Tip Only (Tungsten Steel) - Suspension Arm Hole Finisher  [AM-492023]

Finishing tip for 4.0mm suspension arm holes

This Arrowmax AM-492023 cutting tip is intended for RC-scale arm reamer use to finish or rectify 4.0mm holes in plastic and composite suspension arms. The tungsten steel cutting element is sold on its own and is engineered to remove burrs and restore a round hole for reliable ball stud and turnbuckle seating.

Use the tip fitted into an appropriate handle or shank designed for hobby setup tools, operating at low speed and light feed to protect the carbide edge. The small 4.0mm profile concentrates on the arm pivot area where accurate hole geometry supports predictable suspension movement and consistent setup measurements.

Care is straightforward: clear swarf after use, avoid side-loading that can chip the edge, and inspect the tip for wear before each session. This accessory is for model components only and is not intended for full-size vehicle applications.