TERMS
Drill Dimensions
d 1 = Drill Diameter d 2 = Shank Diameter l 1 = Overall Length l 2 = Drill Depth l 3 = Body Length
l 2
l 3
l 1
Drill Material
Carbide
HSS
High Speed Steel w/ 8% Cobalt
Solid Carbide
Drill Geometry
Margin
Main Clearance Surface Secondary Clearance Surface
Drill Back
Drill Back Edge
Chisel Edge
Point
Drill Depth Flute Length Body Length
Main Cutting Edge
Web Thickness
Cutting Corner Cutting Face
Shank Length
Overall Length
20º
2xd
H7-H9
130º
Length-to-Dia. Ratio
Achievable Hole Tolerance
Drill Point Angle
Helix Angle
5
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