When selecting the tool, to make the dimensions of the tool with the workpiece surface dimensions adapted. Production, plane parts around the contour machining, often using end mills; milling plane, to be elected carbide blade cutter; machining boss, when grooves for high speed steel end mills; rough surfaces or rough machining when the hole, you can select the corn milling inserts carbide inserts; for some three-dimensional contour of the bevel surface and variable processing, often using ball-cutter, circular cutter, conical cutters and disc cutter.

     During freeform, because the ball head cutter cutting the ends of zero, therefore, to ensure precision cutting line spacing is generally very small, so the ball end mill suitable for surface finishing. The end mill processed either on the surface or in the processing efficiency quality far superior ball-cutter, therefore, to ensure that parts processing, but under the premise of the cut, when roughing and semi-finishing surfaces, try to choose a side cutter. In addition, the durability and precision cutting tools and tool prices great relationship, and we must note that in most cases, to choose a good tool despite an increase in the cost of the tool, but the resulting machining quality and efficiency you can greatly reduce the cost of the entire process.

     In the processing center, all tools are all pre-installed in the knife Curry, corresponding ATC action selected by the NC program knives and ATC instructions. Must use the appropriate standard tool holders for machine tool system specifications for CNC machining can be quickly and accurately with the tool to be installed on the machine spindle or return to the magazine. Programmers should be able to understand the size of the machine used by the holder of the content structure, adjustment method and the adjustment range, etc., in order to ensure the tool to determine when programming the radial and axial dimensions, reasonable arrangements for the order of the tool.