Poly-crystalline diamond (PCD) milling tools and tiped inserts for cutting aluminium with a high silicon content, such as the cast aluminium alloys frequently used in building aircraft, produce heavy wear on standard cutting materials. Using PCD inserts, cutting speeds of up to 2500 m/min are achieved. With appropriate tooth feed, feed rates are obtained in the rapid traverse range,GH could offer an extensive range of products for HSC operations on aluminium in the areas of solid drilling, roughing, reaming, thread cutting and milling. Using multi-functional PCD insert geometry, parts can be produced quickly, flexibly and to higher quality.