DRILL STUB 4.50mm
2021-4.50
Other Drills
Description
Product Code: 2021-4.50
Description: 4.50mm Stub Drill
Number Pieces: 10
Brand: Bordo
Specs:
Surface Finish: Black
Material: HSS
Point Type: 135 degree Split Point
Flute Type: 30 degree Helix
Diameter: 4.50mm
Fluted Length: 24mm
Overall Length: 58mm
Standard: DIN1897
Notes:
Black Finish
(also called blue finish)
A black finish is achieved by steam tempering, a thermal process resulting in a porous tool coating. This surface helps to keep lubricant on the tool, particularly important on the cutting edges, thus reducing friction and cold welding. The result is increased tool life. Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.
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