Arrowmax AM-492023 Arm Reamer 4.0 X 90MM Tip Only (Tungsten Steel) — arm reamer tip for RC suspension arm hole finishing  [AM-492023]

Arm reamer tip for precise arm holes

This Arrowmax AM-492023 replacement tip is an RC-scale arm reamer cutting tip intended to finish or correct 4.0mm arm holes on plastic and composite suspension arms. The tungsten steel tip is supplied as the cutting element only, designed to restore roundness and remove burrs that affect ball stud or turnbuckle seating during setup.

Use the tip with an appropriate handle or holder designed for RC setup tools, working at low speed and light feed to avoid overheating the carbide edge. The small-diameter 4.0mm profile focuses on the arm pivot area where consistent hole geometry improves predictable suspension movement and repeatable setup measurements.

Care and maintenance are straightforward: keep the tip clean of debris, avoid side-loading that can chip the edge, and inspect before each session for wear. As an RC accessory, it is intended for model components only and not for full-size vehicle applications.