This is a practitioner of more than 30 years of machining practitioners to select the knife experience.

Many companies machining practitioners we have a big misunderstanding in the selection of the knife, is the material does not match, many people may only use high-speed steel or carbide cutting tools. Confucius: what is the love of the world, a thing of the world, in fact, each of the materials being processed, there is one of the most corresponding material can be cut, the following on these common machining materials, in accordance with the most suitable, suitable, more suitable an order, listed below:


The first common material: aluminum or other non-ferrous metals. Drilling, preferred PCD, followed by carbide tools; tapping, preferred carbide, followed by high-speed steel; milling, preferred PCD, milling cutter or insert, followed by carbide.

The second common material: is the hardness within HRC40 degrees of steel parts, including alloy, steel. Drilling, preferred carbide, followed by high-speed steel drill; tapping,

preferred powder metallurgy high-speed steel taps, then carbide extrusion taps can be used. Milling cutter, preferred carbide milling cutter or insert, finishing, with metal ceramic insert or milling cutter.

The third common material: high hardness steel, generally refers to HRC45 degree or HRC50 above steel parts. For drilling, only carbide drills are recommended; for tapping, carbide thread milling cutters are recommended without considering taps; for milling or turning, CBN is preferred, followed by ultra-fine carbide tools.

The fourth common material: stainless steel. Drilling, to recommend carbide drills with internal cooling, no internal cooling, we choose powder cure gold high-speed steel drills, the famous NACHI FUJIKOSHI L7572P is very suitable, or high drilling high-speed steel drills; tapping, the first choice of powder metallurgy high-speed steel taps, or high cobalt high-speed steel taps; milling cutter, the first choice of tungsten carbide milling cutters or inserts. Other materials are not recommended.

The fifth common material: ductile iron, automotive industry with more. Drilling, preferred carbide drill, then high-speed steel drill; tapping, preferred powder metallurgy high-speed steel taps, basically do not recommend the other; milling, just use carbide milling cutter or insert.

The sixth common material: gray cast iron. Drilling, only recommended carbide drills; tapping, the first carbide straight flute taps, followed by high-speed steel straight flute taps; milling, recommended carbide milling cutters or inserts; high-speed finishing, be sure to choose CBN or ceramic inserts or milling cutters, the surface roughness will be very good.

The seventh common material: titanium alloy. Drilling, note that must be internal cold carbide drill; tapping, choose powder cure gold high-speed steel taps, but must be special type, followed by the choice of carbide internal cold extrusion taps can also be processed; milling, choose carbide tools.

The eighth common material: nickel-based and other high-temperature alloys. Drilling, only recommended for internal cooling carbide drill; tapping, recommended for powder cure gold high-speed steel special type, and then choose carbide inserts or milling cutter.