Description of coolant-fed drill
1.Dimension : 3.3x66, 3.5x66, 6.0x82, 8.0x91, 16.0x133 and customized sizes
2.Measurements manufactured according to standard DIN6537
  Chisel edge grinding IRK standard
  Primary edge point angle 140°
  Shank according to DIN6535HA h6
3.Coating : Optinal
4. Tolerance of cutting edge diameter m7
5.Chip Evacuation Groove special designed, easy evacuation
6.Use for the process of structual steel, Alloy steel, Staineless steel and other common materials; Precise centering ability which enable to gain stable dimensional accurancy and fine surface quality; suitable for process system with excellent rigidity.