LMT Onsrud’s diamond film-coated compression tool is suited for machining composite materials. The cutter geometry features a spiral design in which the upcut and downcut spiral flutes intersect from both directions and push the individual layers of the composite material together. This keeps the layers from separating, preventing delamination in not only the material’s upper and lower covering layers, but also in inner layers that are hidden from view. Additionally, the PCD coating protects the tool from wear.