How To Choose Milling Inserts?

A milling insert is a rotating tool with one or more teeth used for milling machining. Milling inserts are mainly used for machining flat surfaces, steps, grooves, formed surfaces, and cutting workpieces on milling machines. There are various types and uses of milling cutters, such as flat end milling cutters for rough and precision milling of horizontal planes or contours, ball end milling cutters for semi precision milling and precision milling of curved surfaces, flat end milling cutters with chamfers for rough and precision milling of fine flat surfaces, and forming milling cutters including chamfering cutters, T-shaped milling cutters or drum cutters, toothed cutters, inner R-cutters, etc.How to choose from so many styles of milling inserts? Here are some methods.

Firstly, choose according to the type of processing.

For precision milling, it is best to use grinding inserts. This type of insert has good dimensional accuracy, so the positioning accuracy of the insert in milling is high, which can achieve good machining accuracy and surface roughness. In addition, the development trend of grinding milling inserts used in precision machining is to grind out chip grooves, form large positive rake cutting edges, and allow the insert to cut at small feed rates and depths.

For rough machining, it is best to use a pressing insert to reduce processing costs. The dimensional accuracy and sharpness of the pressing insert are inferior to those of the grinding insert, but the cutting edge strength of the pressing insert is better. It is resistant to impact during rough machining and can withstand large cutting depths and feed rates. Sharp large front angle inserts can be used for milling viscous materials.

Secondly, choose according to the insert material.

Hard alloy inserts are suitable for high-speed cutting and processing of high-strength materials. High speed steel inserts are suitable for low-speed and medium speed cutting, as well as processing materials with high toughness. Ceramic inserts are suitable for processing high temperature and high hardness materials.

Thirdly, choose according to the shape of the insert.

Circular inserts are suitable for flat milling and boring; Square inserts are suitable for processing grooves and step surfaces; Special shaped inserts are suitable for processing complex curved surfaces.

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