End Mill Style Guide - Carbide, Cobalt & High Speed Steel
End Mills
End mills, similar to router bits, are primarily designed for metal cutting applications but are capable of milling other materials such as plastics, composites and hardwoods. Spiral flute end mills are designed with an up-cutting flute design and require rigid tool holding and work holding.These end mills for sale are designed for slotting and profiling and in most cases are center-cutting to allow for plunge cutting as well. Standard end mill types feature a 30 degree helix, however end mills designed for specific applications or for high-performance milling may use a different flute helix. All Kodiak End Mills for Sale are Made in the USA. We pride ourselves on stocking a comprehensive selection of high speed steel, cobalt and carbide end mill types for a variety of materials and applications. Below is a selection guides for choosing the best Kodiak end mill for your milling operation.
2 Flute High Speed Steel End Mills
Made of high speed steel for general milling applications. Two flute configuration allows for maximium chip evacuation. Often used in softer material that produces stringier chips. High speed steel end mills are generally more forgiving than carbide tools and often used in less ridgid machine set ups. High speed steel end mills are manufactured with a flat that it allows a set screw to be engaged to hold the end mill in place. We have a listing of the standard sizes of endmills on our website, however there are many other configurations and sizes available. Please contact us or details and a further selection.
Link: Two Flute Square End High Speed Steel End Mills
4 and 6 Flute High Speed Steel End Mills
Made of high speed steel for general milling applications. Four flute and six configuration allows for better finishes and more work per rotation of the tool. High speed steel end mills are generally more forgiving than carbide tools and often used in less ridgid machine set ups. High speed steel end mills are manufactured with a flat that it allows a set screw to be engaged to hold the end mill in place. We have a listing of the standard sizes of endmills on our website, however there are many other configurations and sizes available. Please contact us or details and a further selection.
Link: Four and Six Flute Square End High Speed Steel End Mills
M42 Cobalt End Mills
Made of M42, 8% cobalt, for general milling applications. Two flute configuration allows for maximium chip evacuation. Often used in softer material that produces stringier chips. Available in most basic end mill types.
Link: M42 Cobalt End Mills
4 Flute Carbide End Mills
A micrograin carbide end mill for general milling applications. Four flutes tools do more work per rotation and can provide a better finish, but leave less room for chip evacuation. This is the most common number of flutes on a basic end mill.Available in most basic end mill types.
Link: Four Flute Carbide End Mills
Ball Nose (Ball End) Carbide End Mills
Ball nose end mills are used to create rounded profiles and also used for general material removal in some applications. Full slotting applications include o-ring grooves and other such applications that require a full radiused slot or partial radius profile milling operation. Available in some basic and high performance end mill types.
Link: Ball Nose Carbide End Mills
Corner Radius Carbide End Mills
If you are able to use one for your application, corner radius end mills improve productivity and reduce costs. A sharp corner of an end mill is its weakest point. The corner radius design strengthens the endmill by reducing chipping and providing longer tool life. The corner radius also produces a stronger corner in the finished part. These are used in many industries, such as in aircraft manufacturing, requiring strong corners from lighter weight parts. Available in some basic and high performance end mill types.
Link: Corner Radiused Carbide End Mills
Stub Length Carbide End Mills
Stub length end mills are the best choice when a longer length of cut or tool length is not required. A rule-of-thumb when milling is to use the shortest length possible for your job. This produces a more rigid tool set up and allows for better milling results with less chatter. Stub length tools are also less expensive and can save money on jobs the do not require the flute length of a standard pattern milling bit. Available in limited basic and high performance end mill types.
Link: Stub Length Carbide End Mills
Double End Carbide End Mills
Double-End mills reduce costs using both ends of the carbide and are an efficient design when the job and machine set up allows for them. Standard length double-end tools feature a Weldon flat. Available in limited end mill styles.
Link: Double-End Carbide End Mills
Long Carbide End Mills
These long series end mill bits feature a longer shank length to reach into pockets and cavities that are unreachable with standard length tools. The rigid nature of the carbide material allows for minimal deflection and greater accuracy in these extra length tools. Some popular diameteres are available with a choice of flute lengths. Available in limited end mill styles.
Link: Long Length Carbide End Mills
Extra Long Carbide End Mills
These extra-long series end mill bits feature a extra long shank length to reach into pockets and cavities that are unreachable with standard long length tools. The rigid nature of the carbide material allows for minimal deflection and greater accuracy in these extra long length tools. Some popular diameteres are available with a choice of flute lengths. Available in limited end mill styles.
Link: Extra-Long Length Carbide End Mills


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