Drill Doctor 400 - Manual (Page 6)

4
www.DrillDoctor.com
Identifying Basic Drill Bits
The Drill Doctor ® is most efficient when used to resharpen a
drill bit’s original point angle. With its standard diamond grind-
ing wheel it will sharpen high-speed steel, cobalt, TiN-coated,
carbide and masonry drill bits.
It has been designed and engineered to sharpen three of the
most common drill bit types:
Standard Point
This general purpose point is used for
drilling softer materials like cold
rolled steel, aluminum, and wood.
Masonry bits have a carbide insert
at the point and are used for drilling
materials like cement, brick, and
ceramic.
Split point bits are self-centering
and are generally used for tempered
steels, hard alloys or hard cast
materials.
Anatomy of a Drill Bit
It is important to understand that
each bit has a Chisel Edge, a Cutting
Edge, and a Heel.
When viewing a well sharpened bit
from the end, the entire surface from
the Cutting Edge to the Heel will have
a finely ground surface without ridges
or indentations. And, the Heel will
always be lower than the Cutting Edge.
Heel
Chisel
Edge
Cutting
Edge
Heel
Cutting
Edge