Which end mill has the largest helix angle？

In common end mills, the size of the helix angle varies depending on the type of tool, application and manufacturer. In general, end mills with larger helix angles are often used to improve cutting efficiency, chip removal performance and machined surface quality.

The type of end mill with the largest helix angle:

According to publicly released information, the 60° helix angle end mill is one of the end mill types known to have a large helix angle. This type of end mill is suitable for high-speed cutting of hard-to-cut materials, such as SUS304 stainless steel, that have low thermal conductivity and are prone to increased flute tip temperatures during cutting. Its unique cutting edge shape suppresses the effect of cutting heat on the cutting edge, improving cutting efficiency and tool life.

The influence of the size of the helix angle:

Cutting efficiency: the larger the helix angle, the longer the contact length between the cutting edge and the workpiece, the more material may be removed per unit time, thus improving cutting efficiency.

Chip removal performance: The larger the helix angle, the wider the chip removal groove, which helps to improve the chip removal performance and reduce the damage to the tool caused by chip accumulation and cutting heat.

Machining surface quality: the helix angle increases, the cutting process is smoother, which is conducive to reducing the surface roughness and improving the machining surface quality.

Tool life: the impact of helix angle on tool life needs to be considered comprehensively. Helix angle increase, the cutting edge and the workpiece contact length increases, may accelerate the tool wear; but on the other hand, the smoothness of the cutting process, help to extend the tool life.

Selection recommendations:

Selection according to the processing material: for hard-to-cut materials with low thermal conductivity and easy rise in cutting edge temperature, such as stainless steel, etc., you can choose end mills with larger helix angle.

Selection according to processing requirements: roughing, you can choose a larger helix angle end mill to improve cutting efficiency; finishing, you need to select the appropriate helix angle according to the requirements of machining accuracy and surface quality.

Consider the performance of machine tools: machine tool rigidity, power and other performance will affect the use of end mills. When the rigidity of the machine tool is not enough, it is not suitable to choose too large helix angle of the end mill.

Summarize:

The 60° helix angle end mill is one of the end mill types with a known large helix angle, suitable for high-speed cutting of difficult-to-cut materials. When selecting end mills, it is necessary to consider factors such as specific machining materials, machining requirements and machine performance in order to select the appropriate helix angle.