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On the Model 750X
Aligning the Drill Bit
This makes sure that the Drill Doctor creates the right
geometry. And, it sets the bit so that only a small amount
of the tip is taken off.
See page 17 to align and sharpen a Masonry drill bit.)
1.
Insert bit in Chuck and
tighten
Insert the bit into the Chuck
Jaws and close the Jaws just to
the point where the bit slides in
and out. Do not over tighten
the Chuck; the bit needs to be
able to move in and out until
Step 4. (Model 750X users
refer to “Using the Variable
Material Take-Off (MTO)” on
page 20.)
A good test to see if the Chuck
is tightened the correct amount
is to make sure it moves when
you pull on it with your fingers,
but will not fall out when you
turn the Chuck upside down.
Choose the angle
The Model 750X has addi-
tional advanced features that
enable you to fine-tune your
bit geometry. Loosen the
Point Angle Adjustment
Knob to the right of the
Sharpening Port and slide the
metal Point Angle Adjust-
ment Plate to 118°, 135° or
the custom angle of your choice. Choose your point angle
based on the application you’re drilling. Then re-tighten
the Knob.
Insert Chuck into
Alignment Port
Press the Alignment
Button down and hold it.
Match the either of the
Alignment Guides on the
Chuck with the 118°
Notch on the Alignment
Port. Insert the Chuck.
While holding the button
down, slide the drill bit
forward until it touches
the Drill Stop and the
Chuck is pushed all the
way into the Alignment
Port. Release the Align-
ment Button.
If you are using a Model
750X and have chosen
a custom bit point
(between 115° and 140°),
start your alignment in the closest setting to the point
angle you are using. (For example, if you are setting the
point angle below 118°, than set the alignment in the 118°
setting.) Refer to “Using the Variable Alignment to Adjust
the Chisel and Relief Angle” on page 19.
1”
Alignment Button
Drill Bit
Stop
Point Angle
Adjustment Knob
118°
2.
Alignment
Guide
Choose the angle
Loosen the Point
Angle Adjustment
Knob on the right side
of the Sharpening Port
and slide the metal
Point Angle Adjust-
ment Plate to either
the standard 118° or
the flatter 135° point
angle. Then re-tighten
the Knob.
Point Angle
Adjustment Knob
2.