How To Choose CNC Machining Tools?

Machining center professionals pointed out that the selection of CNC machining center tools is carried out under the human-computer interaction state of CNC programming. The tool and tool holder should be correctly selected according to the processing capacity of the machine tool, the performance of the workpiece material, the processing procedure, the cutting amount and other related factors. The general principle of tool selection is: easy installation and adjustment, good rigidity, high durability and precision. On the premise of meeting the processing requirements, try to choose a shorter tool holder to improve the rigidity of tool processing.

When selecting a tool, the size of the tool should be adapted to the surface size of the workpiece to be machined. In production, end mills are often used to process the peripheral contours of plane parts; when milling planes, carbide insert milling cutters should be selected; when machining bosses and grooves, high-speed steel end mills should be selected; machining blank surfaces or rough machining When drilling holes, corn milling cutters with carbide inserts can be selected; for the processing of some three-dimensional profiles and variable bevel contours, ball end milling cutters, annular milling cutters, conical milling cutters and disc milling cutters are often used.

When machining free-form surfaces, since the cutting speed of the end of the ball nose tool is zero, in order to ensure the machining accuracy, the cutting line spacing is generally very dense, so the ball nose is often used for the finishing of the surface. The flat-end tool is superior to the ball-end tool in terms of surface processing quality and cutting efficiency. Therefore, as long as the premise of ensuring that it does not cut, whether it is roughing or finishing of the curved surface, the flat-end tool should be preferred. In addition, the durability and accuracy of the tool have a great relationship with the price of the tool. It must be noted that in most cases, although the choice of a good tool increases the tool cost, the resulting improvement in processing quality and processing efficiency , the entire processing cost can be greatly reduced.

On the machining center, various tools are installed on the tool magazine, and the tool selection and tool change can be performed at any time according to the program regulations. Therefore, a standard tool holder must be used, so that the standard tools for drilling, boring, expanding, milling and other processes can be quickly and accurately installed on the machine tool spindle or tool magazine. Programmers should understand the structure size, adjustment method and adjustment range of the tool holder used on the machine tool, so as to determine the radial and axial dimensions of the tool during programming. At present, the machining centers in my country use the TSG tool system, and the tool shank has two types: straight shank (three specifications) and taper shank (four specifications), including a total of 16 kinds of tool shanks for different purposes.

In economical CNC machining, since the sharpening, measurement and replacement of tools are mostly performed manually, it takes a long time to assist. Therefore, the arrangement order of the tools must be reasonably arranged. Generally, the following principles should be followed:
Minimize the number of tools;

1: After a tool is clamped, it should complete all the processing parts it can perform;
Roughing and finishing tools should be used separately, even if they are of the same size;
First milling and then drilling;

2: Perform surface finishing first, and then perform two-dimensional contour finishing;

Three: Where possible, the automatic tool change function of CNC machine tools should be used as much as possible to improve production efficiency.


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  • We combine the latest CNC milling and turning processes with proprietary technology to deliver high quality, on-demand parts.
  • Our team of engineers and machinists program the equipment to optimize cutting time, surface finish, and final tolerance to meet your design specifications
  • We specialize in cnc precision machining, single part prototyping, short to medium production runs, manufacture parts on time, every time, so you can stay ahead of schedule
  • CNC machining can create very similar parts to series parts. It is often more efficient and faster than other rapid prototyping technologies for the manufacture of a quantity of prototypes between 1 and 10 parts . We also recommend CNC machining for parts with large sizes (greater than 600 mm).

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