Drill Master Drill Doctor 500X User manual

500X & 750X
500X& 750X
User’s Guide
Guía del Usuario
Mode d’emploi
Model 500X
Model 750X
(24751)
RTD10000273AA

Thank you
...for purchasing a Drill Doctor®. It is sure to become a
valuable tool because you will always have sharp drill bits
before a project, during a project, and after a project.
As president of this company, I am very proud of the qual-
ity of our products—and I am equally proud of the great
people at Drill Doctor®who design and produce them. If
you have questions or need help with your Drill Doctor®,
please contact us and one of our customer representatives
will be there to help. We support what we build!
Use this User’s Guide and the DVD video to learn to oper-
ate your Drill Doctor®quickly and easily. I’d also like to
invite you to visit our website at www.DrillDoctor.com.
There you will find:
•Demonstrations of all operations with the sights and
sounds leading to successful drill bit sharpening
•Downloadable copies of the User’s Guide
•Warranty registration
•Service and contact numbers
Again, thank you for buying a Drill Doctor®. Now go
enjoy its convenience and quality.
Hank O’Dougherty
President, Drill Doctor®

www.drilldoctor.com 1
English
Contents
English...............................................................1
Important Safety Instructions...................................2
Getting to Know Your Drill Doctor®.........................5
Identifying Basic Drill Bits........................................6
Anatomy of a Drill Bit ...............................................6
The Drill Doctor®Sharpening Process ....................7
Choosing Your Drill Bit Point Angle on the
Model 500X.........................................................7
Model 750X.........................................................8
Aligning the Drill Bit.................................................8
Sharpening the Drill Bit ..........................................10
Identifying Correctly Sharpened Drill Bits..............12
Split Points..............................................................13
Creating or Replacing a Split Point.........................14
Identifying Correctly Split Bits ...............................15
Grit Tube Attachment..............................................16
Sharpening Bits of Different Lengths, Diameters and Types
Large Drill Bits .................................................16
Short Drill Bits and Bits Smaller than 1/8" ......17
Masonry Drill Bits.............................................17
Using the Variable Alignment to Adjust Chisel
and Relief Angle ...............................................19
Using the Variable Material Take-Off on the 750X...20
Questions and Answers ...........................................21
Drill Doctor®Maintenance.....................................24
Accessories and User-Replaceable Parts.................27
Warranty .................................................................28
Español ............................................................29
Français............................................................60

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IMPORTANT SAFETY INSTRUCTIONS
For your own safety, please read this User’s Guide before
operating the Drill Doctor®.
Installation
•Carefully unpack the Drill Doctor®drill bit sharpener
and set it on a table. Check to see that no damage has
occurred in shipment. Check all packing material to be
sure that all parts are present. See User’s Guide for
part identification diagram.
•The unit is completely assembled; the Drill Doctor®
only needs to be placed on a flat stable tabletop.
•Connect to properly wired outlet.
Precautions
When using electric tools, basic safety precautions should
always be followed to prevent the risk of fire, electric
shock, and personal injury.
•KEEP WORK AREA CLEAN. Cluttered areas and
bench invite accidents.
•DO NOT USE IN DANGEROUS ENVIRONMENT. Do
not use in damp or wet locations, avoid exposure to
rain. Keep work area well lit. Do not use tools in the
presence of flammable liquids or gases.
•GUARD AGAINST ELECTRIC SHOCK. Avoid body
contact with earthed or grounded surfaces (e.g., pipes,
radiators, ranges, refrigerators).
•KEEP OTHER PERSONS AWAY. Do not let persons,
especially children, not involved in the work touch the
tool or the extension cord and keep them away from
the work area.
•STORE IDLE TOOLS. When not in use, tools should be
stored in a dry, locked-up place out of the reach of chil-
dren.
•DO NOT FORCE THE TOOL. It will do the job better
and safer at the rate for which it was intended.

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•DRESS PROPERLY. Do not wear loose clothing or jew-
elry; they can be caught in moving parts. Wear protec-
tive hair covering to contain long hair.
•USE PROTECTIVE EQUIPMENT. Use safety glasses.
Use face or dust mask if working operations create
dust.
•DO NOT ABUSE THE CORD. Never yank the cord to
disconnect it from the socket. Keep the cord away from
heat, oil and sharp edges.
•MAINTAIN TOOL WITH CARE. Keep the Drill Doc-
tor®clean for best and safest performance. Follow
instructions for maintenance and changing acces-
sories. Inspect cords periodically and if damaged have
them repaired by an authorized service facility. Inspect
extension cords periodically and replace if damaged.
Keep unit dry, clean and free from oil and grease.
•DISCONNECT TOOLS. Always disconnect the Drill
Doctor®when cleaning, inspecting, and changing
accessories, such as the diamond sharpening wheel.
When not in use, disconnect from the power supply.
Never touch internal parts of the sharpener when it is
turned on or plugged in. The rotating diamond wheel
can cause injury.
•AVOID UNINTENTIONAL STARTING. Make sure
switch is in the “OFF” position before plugging in.
•STAY ALERT. Watch what you are doing, use common
sense and do not operate the tool when you are tired.
•CHECK DAMAGED PARTS. Before use of the tool, it
should be carefully checked to determine that it will
operate properly and perform its intended function.
Check for alignment of moving parts, binding of mov-
ing parts, breakage of parts, mounting and any other
conditions that may affect its operation. A guard or
other part that is damaged should be properly repaired
or replaced by an authorized service center unless oth-
erwise indicated in the instruction manual. Have defec-
tive switches replaced by an authorized service center.
Do not use the tool if the switch does not turn it on and
off. Do not use if the grinding wheel is damaged. Use
only grinding wheels recommended by Drill Doctor®.

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•WARNING. The use of any accessory or attachment
other than one recommended in the instruction manual
may present a risk of personal injury.
•HAVE YOUR TOOL REPAIRED BY A QUALIFIED
PERSON. This electric tool complies with the relevant
safety rules. Repairs should only be carried out by
qualified persons using original spare parts; otherwise
this may result in considerable danger to the user.
•NEVER LEAVE TOOL RUNNING UNATTENDED.
•USE EAR PROTECTION DURING USE. The Drill
Doctor®can generate up to 85 dB (A) noise emissions
when in operation.
For Service Contact:
Professional Tool
210 E. Hersey St.
Ashland, OR 97520
USA
Phone: 1-888-MYDRILL (693-7455)
FAX: [phone]
Email: [e-mail]
WARNING:
Some dust created by power sanding, grinding, mis-
cellaneous construction activities, as well as con-
tents from the machine including the molding,
wiring, grinding wheel, or any other parts may con-
tain chemicals known to the State of California to
cause cancer, birth defects or other reproductive
harm and can be hazardous to your health.

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Getting to Know Your Drill Doctor®
Watch the User DVD included with your Drill Doctor®
and become a sharpening expert in minutes!
Cam Guide
Sharpening Port
Power Switch
and Cord
Grit Tube
Chuck
Point Angle
Adjustment
Plate
Bit Clamp Arms
Drill Stop
Split Point Guide Rails
Split Point Port
Splitting Guide
Chuck Jaws
Chuck Knob
Cam
Adjustable Material
Take-Off (MTO) Knob
(750X Only)
Point Angle
Adjustment
Knob
Alignment Button
Wheel
Access Cover
Quick Change
Diamond Sharpening
Wheel (Inside)
Alignment Guides
Sharpening
Guides
Alignment
Port
Relief Angle
Settings
On 750X
MTO is here
Masonry Bit
Alignment Mark

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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.
It has been designed and engineered to sharpen three of
the most common drill bit types and offer you an ability to
customize your point:
Standard Point
This general-purpose point is
used for drilling softer mate-
rials like cold rolled steel,
aluminum, and wood.
Split Point
Split-point bits are self-cen-
tering and are generally used
for tempered steels, hard
alloys or hard cast materials.
Anatomy of a Drill Bit
Chisel Edge It is important to understand
that each bit has a all of
these characteristics.
Cutting Edge
Heel Relief
Angle When viewing a well-sharp-
ened bit from the end, the
entire surface from the Cut-
ting 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.
Cutting Edge
Heel
Masonry Bits
Masonry bits have a carbide
insert at the point and are
used for drilling materials
like cement, brick, and
ceramic.

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The Drill Doctor®Sharpening Process
The sharpening process includes 4 easy procedures:
1. Determine the type and angle of the drill bit.
2. Align the bit in the Chuck.
3. Sharpen the bit.
4. Split the point (if you choose).
Be sure to complete the first three procedures in
order to sharpen a bit; and always sharpen a bit prior
to splitting it.
On the Model 500X
Check your drill bit angle
Most bits are 118° or 135°.
Hold your bit point up to the
key to the left to see which
type your bit looks like. If you
can’t tell due to small size or
damage on the tip, set your
Drill Doctor based on the
application. Most wood and
soft metal applications
should use 118 degree. Hard-
er materials such as stainless
steel and tool steel should
use 135° or if you are drilling contoured materials such a
car fender and plan on splitting the point.
Choosing Your Drill Bit Point Angle
When drilling into certain difficult materials, a shallower
point or 135° point angle produces a better-finished hole.
Your Drill Doctor allows you to sharpen bits with either
the standard 118°or the flatter 135° point angle. You can
also adjust the “chisel and relief angle.” (Refer to page 19
for the benefits of using Variable Alignment to adjust the
Chisel and Relief angles.)
Depending on the material you are drilling in, you may
choose to increase or decrease these angles.
1.

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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.)
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.
Point Angle
Adjustment Knob
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.

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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.
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
118°
2.
Alignment
Guide

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Tighten Chuck
Hold onto the Chuck and
tighten the Chuck Knob.
(Avoid over-tightening the
Chuck in the Alignment Port.
This could damage the Chuck
and Port.)
Remove and re-tighten
Press the Alignment Button
and remove the chucked drill
bit. Tighten the Chuck once
more to ensure the bit won’t
move when you sharpen it.
You are now ready to sharpen
the drill bit.
5.
Sharpening the Drill Bit
Before sharpening you should know:
•Keep the Cam in contact with the Cam Guide as you
sharpen—push the Chuck straight into the Port.
•Only light pressure is required.
4.
Adjust Bit Position
Look at your bit and make
sure the Clamp Arms are in
the bit’s narrowest spot. If
they aren’t, turn the bit in the
chuck so that it is held by the
Bit Clamp Arms at the nar-
rowest width. This is impor-
tant because this setting
determines the angle at which
your bit will be sharpened.
3.
Drill Bit Stop
Bit Clamp Arms

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1.
Cam Guide
Align Guides
Turn the Drill Doctor on.
Align either of the Sharpen-
ing Guides with the Cam
Guide on the machine.
Cam
Insert Chuck and turn
until the bit is sharp
Insert the Chuck in the
Sharpening Port. Making
sure you keep the Cam
against the Cam Guide,
rotate the Chuck one half-
turn in a clockwise direc-
tion—from Sharpening Guide
to Sharpening Guide—an
even number of times. Your
motion should be smooth and
even. To sharpen both sides of the bit evenly, always use
an even number of half-turns. The number of turns needed
to sharpen the bit depends on the size.
Turn the Chuck an even number of half-turns with light
inward pressure:
•3/32-inch bits—use 2 to 4 half-turns,
•1/8-inch bits—use 4 to 6 half-turns,
•3/8-inch bits—use 16 to 20 half-turns.
Note: Use just enough pressure to keep the Cam against
the Cam Guide. Let the machine do the sharpening.
Sharpening
Guide
2.
•You will hear a grinding noise (zzzzzzzzz) as you
complete each half-turn and each side of the bit face is
ground.
•The Chuck will rock as you turn it and the Cam rides
on the Guide.
Cam
Against
Cam Guide

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Identifying Correctly Sharpened
Drill Bits (and what to do with
those that aren’t!)
Correctly Sharpened Bits
The entire surface 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. The Chisel Edge will be
clean and straight.
Problem Cause
Chuck Jaws did not grip drill
bit properly in the aligning
process (Page 8).
Solution
Realign the bit by carefully
following steps 1 through 5
on Pages 8 to 10.
Problem
The Chisel Edge is
not clean or
straight.
Cause
The bit isn’t completely ground yet.
Solution
Continue sharpening the bit until
the chisel is clean and straight. If
the machine quits removing mate-
rial before the chisel is clean, re-
align and sharpen again. (Model
750X users can increase or
decrease MTO (material take-off)
to speed up this process.
Chisel Point
Cutting Edge
Heel
The Chisel Edge
is ground flat.
Incorrectly Sharpened Bits

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Cutting Edge
Heel
Relief Angle
Problem Cause
Drill bit alignment.
Solution
Re-align the drill using the
Adjustable Alignment proce-
dure on page 19. To increase
relief, insert the alignment
guide on the chuck closer to
the (+) side of the alignment
port, then sharpen the bit.
Insuffecient (Negative)
relief or a slow cutting
drill bit.
Cause
Chuck too loose or too much
pressure when sharpening.
Solution
Use more torque when tight-
ening the Chuck or less pres-
sure when sharpening. Clean
the Chuck w/ compressed air
if the problem persists.
Bit backing out or
slipping out of the
jaws when you are
sharpening
Problem
Split Points
Split point drill bits prevent walk-around on the material
before they begin to cut.
This feature is described as self-centering. The need to
center punch is effectively eliminated. A standard drill bit
chisel point has to wear an area in the middle of the hole
to be drilled before the cutting edges will remove material.
Due to its additional cutting lips along the chisel edge, a
split point will begin cutting immediately. Up to 70% less
thrust (when compared to a non-split or conventional
point) is required to drill a hole with a split point.

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Creating or Replacing a Split Point
Leave bit in Chuck after
sharpening
Always align and sharpen a
bit before splitting it. To split
the point, do not remove the
bit from the Chuck after
sharpening.
1.
Align Guides
Align one of the Sharpening
Guides on the Chuck (short
white marks) with the Split-
ting Guide on the Splitting
Port. Make sure the Align-
ment Guides insert into the
Split Point Guide Rails in the
Splitting Port.
2.
Split the point
Press Chuck slowly and firm-
ly into the Splitting Port until
it stops. Remove the chuck,
rotate one-half turn, and
repeat.
Check the tip of the bit care-
fully to determine that both
sides of the bit are split
equally. Compare it to the
illustrations. If it does not
match, study the information
following.
3.
Splitting Guide
Sharpening
Guide

www.drilldoctor.com 15
Split lines are nearly straight
across.
Identifying Correctly Split Drill Bits
(And What to Do With Those That Aren’t!)
Correctly Split
Solution
More grinding is needed for
larger drill bits. If one side of
the bit is undersplit, insert
the Chuck into the Splitting
Port again and split both
sides. Push the Chuck into
the Port until it stops. Repeat
until the split sides are equal
and look like the correctly
split bit shown above.
Undersplit
Oversplit Solution
Reinsert the chucked bit into
the Sharpening Port and
remove enough of the tip
until the split tip looks like
the correctly split bit above.
Too much material
removed. Split lines are
joined in the center and
Chisel Edge has been
removed.
Split lines do not meet in
the center but Chisel
Edge remains.
Split line
Not enough material has
been removed from the
Heel of the drill bit.

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Grit Tube Attachment
The Grit Tube attachment
is designed to keep any
sparks caused by sharpen-
ing safely inside the
machine and away from
you. In addition, the Grit
Tube reduces the sharpen-
ing dust in the air and on
your workbench.
Simply insert the Grit Tube into the Splitting Port of your
Drill Doctor when sharpening. It will catch the grit that is
formed from the sharpening process. Clean the inside of
your Drill Doctor and the Grit Tube on a regular schedule.
The grit tube is designed to accept a standard 1” shop vac-
uum for extended periods of sharpening.
Sharpening Bits of Different Lengths,
Diameters, and Types
Drill Bits Of Different Sizes
Too many rotations of a small-diameter bit may result in
incorrect sharpening and too few on a large bit may not
sharpen enough. Continue to sharpen until the Chisel
Edge is clean and straight and the entire surface from the
Cutting Edges to the Heel is finely ground.
•3/32-inch bits—use 2 to 4 half-turns,
•1/8-inch bits—use 4 to 6 half-turns,
•3/8-inch bits—use 16 to 20 half-turns.
Large Drill Bits
The Model 500X sharpens bits from 3/32” to 1/2”. (You
can also purchase a Large Bit Chuck that sharpens bits up
to 3/4”.) The Model 750X comes equipped with that
Large-Bit Chuck. It sharpens bits from 3/32 to 3/4 inches.
Large bits are sharpened just like any other bit.
It is important to sharpen these bits so that the entire face
of the drill bit is sharpened. A large bit requires more
pressure and will require more half-turns to sharpen it.

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Short Drill Bits and Bits Smaller than 1/8”
Set the point angle for 118°. Put the bit in the Chuck as
normal, but tighten Chuck so that it is just snug enough
for the bit to move freely. Push and hold the Alignment
Button. Partially insert the Chuck in the Alignment Port,
but do not push the Chuck all the way in. Use the Chuck
Knob to rotate the bit until it can be held by the Bit Clamp
Arms in the narrowest width of the bit. Make sure that the
bit is touching the Drill Stop, then release the Alignment
Button. Turn the Chuck until the Alignment Guide on the
Chuck aligns with the 118º notch on the Alignment Port.
Now, push the Chuck the rest of the way in. Tighten the
Chuck, remove, and tighten again.
Sharpen the small bit as usual.
Aligning and Sharpening Masonry Drill Bits
To sharpen a masonry bit, you do not turn the Chuck.
Instead you insert the Chuck until it touches the wheel,
remove, and repeat on the other side.
1. Set the point
angle to 118°.
Bits 1/2” or larger will need a minimum of 40 half turns. A
3/4” bit may require up to 60 half turns. It may take two
or three complete sharpenings (repeat all steps) to re-
sharpen a very dull or chipped large drill bit.
Your Drill Doctor is delivered with a 180-grit Diamond
Sharpening Wheel. If you regularly sharpen larger bits
between 1/2” and 3/4”, you may wish to purchase the
coarser 100-grit Diamond Sharpening Wheel, which
sharpens larger bits faster.

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3. Set the depth
Set the depth by lining up the
Sharpening Guide with the Cam
Guide. Push the Chuck into the
Sharpening Port until it stops and
tighten the Chuck. Remove the
Chuck to ensure the carbide insert
is aligned with the
Masonry Sharpen-
ing Marks and
tighten again.
Sharpen by “plunging”
Line up the Sharpening Guide
on the Chuck with the Cam
Guide on the machine. Plunge
the Chuck into the Sharpening
Port until it touches the Sharp-
ening Wheel. Remove the
Chuck, rotate one half-turn
clockwise and repeat the plunge
action. Start with four plunges
and always use an even number.
Inspect the bit and continue until the cutting surfaces are
sharp. If the bit stops grinding before the edges are sharp,
loosen the Chuck, push the bit out slightly. Make sure car-
bide insert is still aligned with Masonry Sharpening
Marks. Tighten the Chuck, and continue sharpening.
2. Align the bit with the Masonry
Sharpening Marks
Insert the bit into the Chuck and line
up the carbide insert on the tip of the
bit so that it is parallel to the Mason-
ry Sharpening Marks on the end of
the chuck. Leave about
1/2”-5/8” of bit stick-
ing out past the nose of
the chuck. Tighten the
chuck just to the point
that the bit slides in
and out.
Cam Guide
Cam
Sharpening Guide
Masonry
Sharpening Marks
4.
Cam
Guide
Cam
Carbide Insert