Identifying Basic Drill Bits; Anatomy Of A Drill Bit - DRILL DOCTOR 350X Guia Del Usuario

Identifying Basic Drill Bits

The Drill Doctor is most efficient when used to sharpen a
drill bit's original point angle. With its standard Diamond
Sharpening Wheel it will sharpen high-speed steel, cobalt,
TiN-coated, carbide and masonry drill bits.
The Model 350X has been designed and engineered to
sharpen the most common drill point types:

Anatomy of a Drill Bit

Chisel
Cutting
Edge
Heel
Leading
Relief
Edge
Angle
Cutting Edge
Heel
6
Standard Point
This general-purpose point (nor-
mally 118°) is used for drilling
softer materials like cold rolled
steel, aluminum, and wood.
Masonry Bits
Masonry bits have a carbide
insert at the point and are used
for drilling materials like cement,
brick, and ceramic.
It is important to understand that
Edge
each bit has a Chisel Edge, a Cut-
ting Edge, a Heel, a Relief Angle,
and a Leading Edge. (The Lead-
ing Edge will be important in bit
alignment.)
When viewing a well-sharpened
bit from the end, the entire sur-
face from the Cutting Edge to the
Heel will have a finely ground
surface without ridges or indenta-
tions. The Heel will always be
lower than the Cutting Edge; this
is called positive relief.
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