Hexagonal shank four-edge four-flute drill bit
Handle specifications: Hex 6.35mm(1/4)
total length: 165mm
This four-slot drill bit is suitable for deep hole operations in wood and is 30 times more efficient than ordinary woodworking hole openers.% speed, and the ability to discharge wood chips is increased by 20% .It is nearly twice the drilling depth and is a powerful tool for dealing with thick plates.
( Also suitable for opening holes in foam boxes)
pay attention:
This new type of drill bit is self-tapping. The rotation speed should not be too fast. Please refer to the following table for details. If the rotation speed is too fast, the screw head will get stuck and the drill cannot be drilled. Returns will not be accepted.!
diameter( mm) Rotating speed( RPM)
10- 20 1500-2000
twenty two- 25 1000-1500
28- 35 ＜1300
