roughing end mill - side and front view
Roughing End Mills are designed for roughing (hogging) large amounts of metal prior to a finish mill operation. They are also known as Hogging End Mills.
SUPER STEEL (M2-AL)
M2-Al High Speed Steel is a premium alloy formed by adding aluminum to the base chemical composition of M2 HSS to extend tool life and to dissipate heat. It is often referred to as "Super Steel."
1/4" to 2" page 268

COBALT (M42)
Used for deep slotting or heavy side cuts and require less power than conventional end mills. Ideal for machining high alloyed steels, titanium alloys, and cast alloys. Form-relieved edges stay constant and can be resharpened by grinding the faces.
1/4" to 2" page 268

SOLID CARBIDE

Type "A" for Aluminum Alloys
Type "A" Solid Carbide Roughing End Mills are designed with a special tool geometry for maximum stock removal when milling aluminum, brass, and copper alloys. Corner radius design eliminates corner chipping. Available in Titanium Nitride (TiN), Titanium Carbonitride (TiCN), and Titanium Aluminum Nitride (TiAN) coatings.
1/4" to 1" page 269

Type "N" for Nickel Alloys
Type "N" Solid Carbide Roughing End Mills are designed with a special tool geometry for maximum stock removal when milling Titanium, Inconel, Rene, Waspaloy, and high temperature nickel base alloys.  Corner radius design eliminates corner chipping. Available in Titanium Nitride (TiN), Titanium Carbonitride (TiCN), and Titanium Aluminum Nitride (TiAN) coatings.
1/4" to 1" page 269

Type "S" for Steel Alloys
Type "S" Solid Carbide Roughing End Mills are designed with a special tool geometry for maximum stock removal when milling mild steel, steel alloys, stainless steel, and cast iron.  Corner radius design eliminates corner chipping. Available in Titanium Nitride (TiN), Titanium Carbonitride (TiCN), and Titanium Aluminum Nitride (TiAN) coatings.
1/4" to 1" page 269