COGO TOOL's technical info

■ End mill
It's a consumable cutting tool of the precision process for metal mold, machine tool parts, and various electronic equipment parts, and etc.

• Product for which many varieties of a small amount and technological specialization are necessary. 
• product that has a characteristic which has to be discarded after using in spite of expensive one.

■ End mill each part name

• Outside diameter : the maximum external diameter of the cutting edge of End mill.
• Shank diameter : the maximum external diameter of the shank part of End mill.
• Shank length : length of the support in the milling machine.
• Length of cut : length of the cutting part of End mill.
• Overall length : whole length of the cutting part, shank part and neck part at the center line of the End mill.
• Number of Blades : It refers the number of the cutting blades. There are various type such as 1,2,3 or 4 blades but generally 2,3,4,5 and 6 blades are commonly used.

• Rake angle : It's very important part in the cutting performance of the End Mill. It means the angle between the hollow surface and the assumed center line when seeing the bottom end teeth from straight ahead.
• Radial primary relief : It means the first angle of the radial cutting part that is important in cutting performance as the rake angle.
• Land width : whole width of both radial primary and secondary reliefs.
• Flute : It's used in the passage that chip can be passed during the cutting process. Also, when this flute gets smaller, it influences the whole cutting process because chip cannot discharged smoothly.

■ Types of the cutting part

-Square End Mill, Ball Nose End Mill, Taper End Mill, Taper Ball End mill, Center Cutting, End Cutting