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For Aluminum
the screw shrinks without chipping
The parameters in the above table are for low-carbon steel with a thickness of 2mm
Special circumstances may require special treatment
Different coating thicknesses are matched to different cutting edge requirements
BB Spot Drill Bit CNC Hole Making Tool NC 60 90 120 Degree Short Drill 1mm-20mm Hard Steel Aluminum Coating BL2060 BC2055 Hole Diameter:6mm For AluminumBB Spot Drill BL2060 BL2060 For iron, steel BC2055 For aluminum ,nonferrous metals Spot Hole Chamfering Completed in one Step Precision machine grinding, large core diameter design enhances rigidity and shock resistance, less likely to chip, smooth cutting, improves milling efficiency Center Drilling Hole + Chamfering Drilling Multiple Specifications and Materials Available BL2060 For iron, steel,Etc BC2055 For aluminum ,nonferrous metals,Etc For More