The turning tool is an indispensable part of the lathe processing. The knife is composed of two parts: the cutter head and the arbor. Arbor is generally made of carbon structural steel. The head is used for cutting work, the use of materials must have the following three basic functions:
1. Cold Hardness - hardness at room temperature, also known as wear resistance.
2. Red hardness - at high temperatures can also maintain the required hardness of cutting.
3. Toughness - the ability to withstand vibration and shock loads.
The knife is divided into two types: high speed steel and carbide cutting tools