What is End mill?

COGO TOOL is a end mill company that offer many kinds of mechanical tools. COGO TOOL High Speed End Mills series are produced with special coating process for maximizing anti-abrasion and nano-ultrafine particles carbide alloy, which show the excellent performance of high speed and efficiency.

end mill is a type of milling cutter, a cutting tool used in industrial milling applications. It is distinguished from the drill bit, in its application, geometry, and manufacture. While a drill bit can only cut in the axial direction, a milling bit can generally cut in all directions, though some cannot cut axially. End mills are used in milling applications such as profile milling, tracer milling, face milling, and plunging. 

<Aluminium Titanium Nitride AlTiN) coated Endmills, coated using the Cathodic arc deposition technique>

End mills are typically made on CNC (Computer Numeric Control) controlled Tool and cutter grinder machines under high-pressure lubricants such as water, water-soluble oil, and high-flashpoint oil. Grinding inside the machine is accomplished with abrasive wheels mounted on a spindle (and in some cases, multiple spindles). 
Depending on what material is being ground, these wheels are made with industrial diamond (when grinding tungsten carbide), cubic boron nitride (when grinding cobalt steel), and other materials (when grinding, for instance, ceramics), set in a bond (sometimes copper).

(source : google)

The Cogo Tool Inc.

#1108, Hoseodae Venture Tower 319,
Gasan-Dong, Geumcheon-Gu,Seoul, South Korea
Telephone : 82-2-2038-0845
FAX : 82-2-2627-5945
E-mail : cogotool@gmail.com
Website : cogotool.com