The Beginners Guide of CNC End Mill

If you are new to CNC processing, you may think that…
There are so many end mills in the catalog, what’s the difference? And which end mill should I use on my CNC machine?

First, we need to know, what is CNC End Mill for? 
Simply put, End Mill is one kind of milling cutter to do the process of removing metal by CNC Milling machines.
There are various diameters, flutes, lengths, and shapes to choose from. Basically, users choose them according to the material of the workpiece and the surface finish required for the workpiece.

So, let's start by introducing the appearance of the End Mill, including the shapes, flutes, geometry, and coating.

1. End Mill Shapes

A. Square End Mill:

Also known as a "flat end mill", which is the most common one and can be used for many milling applications, including side milling, slotting, profiling, and plunge cutting.

 Related Products: SPEED TIGER Square End Mill

B. Ball Nose End Mill:

The end flutes of Ball Nose End Mill is with no flat bottom. It's is ground with a full radius equal to half of the tool diameter. For example, you may say 5R to a 10mm ball nose end mill. Ball nose mills are used for contour milling, shallow pocketing and contouring applications, etc. They are especially good for 3D contouring because they leave a nice rounded edge. 

Related Products: SPEED TIGER Ball Nose End Mill

C. Corner Radius End Mill:

Imagining there is a radius form at a sharp corner of square end mill, that's a corner radius milling tool. These are commonly used to mill mold & die as you don’t need to use nearly as many tool changes to get flat-bottom pockets and rounded contours.

 Related Products: SPEED TIGER Corner Radius End Mill

D. Taper End Mills:

Also known as pencil end mills and conical end mills, these names are used for describing the shape of its flute. They can produce grooves, holes, or side-milling with a slope angle. 

Related Products: SPEED TIGER Taper End Mill

E. Long Neck End Mill:

The design can avoid the interference between the tool and workpiece by reducing the shank diameter behind the flute, which is ideal for deep slotting (deep pocketing). 

 

F. CNC Router Bits:

CNC router bits are the cutting tools that work on a CNC router. They usually can be made to cut non-ferrous metals (soft materials), such as aluminum, brass, copper, MDF, plastic, PVC, wood, and more.



Related Products: SPEED TIGER CNC Router Bits
 

2. End Mill Flutes

Which part is the flute?  

The answer is the spiral channels on an end mill. And the design of the flute also will determine which materials you can cut.
 
The most common options are 2, 3, or 4 flutes. Generally, fewer flutes mean better chip evacuation, but at the expense of surface finish. More flutes give you a nicer surface finish, but worse chip removal.
 

Table of end mills flutes number

- The different performances of different numbers of flutes.

- The effect of helix angle: 

Related Products Info:

   Square End Mill: also known as a "flat end mill".  The flutes are with sharp corners that are squared off at a 90° angle. They are the most popular and general milling cutters.
 Ball Nose End Mill: It is ground with a full radius equal to half of the tool diameter. For example, you may say 5R to a 10mm ball nose end mill.
 Corner Radius End Mill: There is a radius form at a sharp corner of the square end mill, that's a corner radius milling tool.
 Taper End Mill, pencil end mills, or conical end mills, these names are used to describe the shape of its flute. They can produce grooves, holes, or side-milling with a slope angle.
 45°, 60°, 90°, 120°chamfer angles; can do top chamfer and bottom chamfer.
 Aluminum Application Experts: Aluminum alloy is one of the exotic materials because the chips can stick to the flutes and pack, and Speed Tiger designed a series of Aluminum End Mill to meet many kinds of processing demands.

 If you have any questions or needs, please feel free to contact us! 
OR Custom End Mill for your project !

SEND US AN INQUIRY :)