Types and Characteristics of End Mills - Melin ToolFlutes - Spiral cutting edge on the end mill. 2 and 4 flute end mills are the most commonly used. 2-Flute - Allows maximum space for chip ejection. Used for general milling operations. 3-Flute - Excellent for slotting. Used for general milling operations. 4, 5, 6, and 8 Flute - A greater number of flutes reduces chip load and can.types and characteristics of end mills,Characteristics of cutting tools:Plain Milling Cutter,End Mill,Side .Sep 6, 2011 . Characteristics and processing differences of the four kinds of cutting tools : Plain Milling Cutter, End Mill, Side Milling Cutter, and Face Milling Cutter.Plain Milling Cutter: Plain Milling Cutter is the most commonly used tool in a horizontal milling machine. Plain Milling Cutter's shape is like disc or cylindrical,.