End milling
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Click below to read more about using end mills.
Corner radius end mills:
End mills for deep slotting:
Using an end mill
Usage
Machining flat faces
Machining inclinations
Taper neck end mills
Slim shank end mills
Corner radius end mills: Usage
Corner radius end mills are used for machining corner radii and contour machining. The table below shows the correct use of corner radius and ball nose end mills.
Corner radius end mills can be used for machining convex curved surfaces, but can not be used for machining concave curved surfaces due to the flat end cutting edge.
Corner radius end mills: Machining flat faces
As shown in the image below, when machining flat faces, corner radius end mills produce a better surface roughness than ball nose end mills. This is because no cusp is produced when using corner radius end mills. Therefore, when machining to a prescribed surface roughness, corner radius end mills can perform at a higher pick feed than ball nose end mills and overall machining efficiency can be increased.
Corner radius end mills: Machining inclinations
For machining inclinations, when choosing the same radius as shown in the image below, a radius end mill with a larger diameter than a ball nose end mill can be used, thereby reducing the amount of tool deflection.
End mills for deep slotting:
Taper neck end mills
For deep slotting, long neck end mills are generally used. Due to a long overhang, the rigidity of the end mill is low. However, for draft angles, the use of a taper neck end mill with a higher rigidity is recommended.
To use taper neck end mills, the interference angle has to be smaller than the angle of the draft as shown in the image. The interference angle of solid end mills is known as the taper angle for indexable insert type end mills.
End mills for deep slotting:
Slim shank end mills
When machining walls deeper than the length of cut, slim shank end mills whose shank diameter is smaller than the cutting diameter are suitable. This is to avoid interference between the shank and workpiece. The image shows how this is done.
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