Drill Master Drill Doctor 500X User manual

THE DRILL BIT SHARPENER
USER GUIDE
GET SHARP BACK TO WORK
AND GET
⚠ Caution!
To reduce risk of injury, the user must read and understand this instruction
manual before using product. Save these instructions for future reference.

Drill Doctor®Drill Bit Sharpener
Class I - Consumer Product DD500X and DD750X
Transportable motor-operated electric drill bit sharpener
Manufactured by Darex, LLC
Maker of Drill Doctor®, Work Sharp®, Work Sharp Culinary®
and DAREX®
Designed, constructed and certied in accordance with:
IEC 61029-1: 1990 First Edition
EN 61029-1:2009+A11:2010
EN ISO 12100:2010
Additionally in compliance with the applicable
requirements of the following Directives and Standards:
EC Machinery Directive (2006/42/EC)
EC Electromagnetic Compatibility Directive (2004/108/EC)
DC DMF (Dimethylfumarate) Regulation (2009/25/EC)
RoHS2 Directive 2011/65/EC

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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
quality of our products—and I am equally proud of
the great people at Darex®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!
This User’s Guide will help you learn to operate your Drill
Doctor quickly & easily. Please visit our website at
www.drilldoctor.com to:
•View instructional videos
•Submit your warranty registration
•Review FAQs
• Contact our service department
Again, thank you for buying a Drill Doctor®.
Now go enjoy its convenience and quality.
Matthew Bernard
President, Darex®

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English................................................................................................ 4
General Safety Rules....................................................................... 5
Getting to Know Your Drill Doctor ®...................................14
Identifying Basic Drill Bits........................................................15
Anatomy of a Drill Bit................................................................15
The Drill Doctor®Sharpening Process ...............................15
Choosing Your Drill Bit Point Angle on the
Model DD500X..........................................................................16
Model DD750X..........................................................................17
Aligning the Drill Bit..................................................................17
Sharpening Drill Bits .................................................................19
Identifying Correctly Sharpened Drill Bits.........................21
Split Points....................................................................................22
Identifying Correctly Split Drill Bits......................................24
Grit Tube........................................................................................25
Sharpening Bits of Dierent Lengths, Diameters,
and Types................................................................................25
Masonry Drill Bits ....................................................................26
Adjusting Chisel and Relief Angles .....................................27
Adjusting the Material Take-O (DD750X only) .............29
Questions and Answers ...........................................................29
Drill Doctor ®Maintenance....................................................32
Parts and Accessories ...............................................................35
Warranty........................................................................................36
Original Instructions
English
Contents

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⚠WARNING! When using electric tools, basic safety
precautions should always be followed to reduce the
risk of fire, electric shock and personal injury. Read all
these instructions before attempting to operate this
product and save these instructions.
⚠WARNING! CHOKING HAZARD!
Small Parts – Not for children under 3-yrs.
Installation/Assembly
The Drill Doctor ®is completely assembled.
Carefully unpack the power tool and set it on the table. Check to
see that no damage has occurred in shipment. Check all packing
materials to be sure that all parts are present. See “Getting to
know your Drill Doctor ®” for a parts indentication diagram.
⚠WARNING! Connect to properly wired (115V or 230V, as
applicable) outlet, or electrical shock may occur.
1. Work Area Safety:
a) Keep work area clean and well lit. Cluttered or dark areas
invite accidents.
b) Do not operate power tools in explosive atmospheres,
such as in the presence of flammable liquids, gases or
dust. Power tools create sparks which may ignite the dust or
fumes.
c) Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control. Do
not let persons not involved in the work touch the tool or
power cord.
d) Make workshop kid proof with padlocks, master switches
or by removing starter keys.
e) Securely place this tool on your workbench during use.
2. Electrical Safety:
⚠DANGER! Electrical shock can kill! Read,
understand and follow ALL safety instructions.
⚠WARNING! Do not expose power tools to rain
or wet conditions. Water entering a power tool will
increase the risk of electric shock.
General Safety Rules

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a) Power tool plugs must match the outlet. Never modify the
plug in any way. Do not use any adapter plugs with earthed
(grounded) power tools. Unmodified plugs and matching
outlets will reduce risk of electric shock.
b) Avoid body contact with earthed or grounded surfaces,
such as pipes, radiators, ranges and refrigerators. There is
an increased risk of electric shock if your body is earthed or
grounded.
c) Do not abuse the cord. Never use the cord for carrying,
pulling or unplugging the power tool. Never yank the cord
to disconnect it from the socket. Keep cord away from heat,
oil, sharp edges or moving parts. Damaged or entangled
cords increase the risk of electric shock.
d) Use proper extension cord. Use only 3-wire extension
cords that have 3-prong plugs and 3-pole receptacles that
accept the power tool’s plug. Make sure your extension cord
is in good condition. When using an extension cord, be sure
to use one heavy enough to carry the current your product
will draw. Use marked outdoor extension cord leads when
the tool is used outdoors.
e) Disconnect tools. Always disconnect your power tool when
cleaning, inspecting, and changing accessories. 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 result in injury.
f) Grounding instructions. In the event of a malfunction or
breakdown, grounding provides a path of least resistance for
electric current to reduce risk of electric shock. This power
tool is equipped with an electric cord having an equipment-
grounding conductor and grounding plug. Do not modify
the plug provided.The plug must be plugged into a matching
outlet that is properly installed and grounded in accordance
with all codes and ordinances. Improper connection of
the equipment-grounding conductor can result in a risk of
electric shock.The conductor with insulation having an outer
surface that is green with or without yellow stripes is the
equipment-grounding conductor. If repair or replacement
of the electric cord or plug is necessary, do not connect
the equipment-grounding conductor to the live terminal.
Check with a qualified electrician or service personnel if the
grounding instructions are not completely understood, or if
in doubt as to whether the tool is properly grounded. Repair
or replace damaged or worn cord immediately.
g) When operating a power tool outdoors, use an extension
cord suitable for outdoor use. Use of a cord suitable for
outdoor use reduces the risk of electric shock.

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Fig. A
Fig. C
Cover of Grounded
Outlet Box
Cover of Grounded
Outlet Box
Grounding Pin
Grounding Means
Metal Screw
Adapter
Fig. D
Fig. B
USA Only
This tool is intended for use on a circuit that has an outlet
that looks like the one illustrated in Fig. A. It has a grounding
plug that looks like the one in Fig. B. A temporary adapter,
which looks like the adapter illustrated in Fig. C & Fig. D, may
be used to connect this plug to a 2-pole receptacle as shown
in Fig. D if a properly grounded outlet is not available. The
temporary adapter should be used only until a properly
grounded outlet can be installed by a qualified electrician.
The green-colored rigid ear, lug, and the like, extending
from the adapter must be connected to a permanent
ground such as a properly grounded outlet box.
3. Personal Safety:
Sharpening operations can create hot sparks and metal debris,
loud noises and dust.
a) Stay alert - watch what you are doing and use common
sense when operating a power tool. Do not use a power
tool while you are tired or under the influence of drugs,
alcohol or medication. A moment of inattention while
operating power tools may result in serious
personal injury.
b) Use personal protective equipment (PPE).
Always wear eye protection. Protective
equipment such as dust mask, non-skid safety
shoes, hard hat or hearing protection used for appropriate
conditions will reduce personal injuries.
c) Use ear protection during use. Drill Doctor®unit can
generate in excess of 85 dB(A) noise emissions when in
operation.
d) Prevent unintentional starting. Ensure the switch is in
the off-position before connecting to power source and/
or battery pack, and when picking up or carrying the tool.
Carrying power tools with your finger on the switch, or
energizing power tools that have the switch on invites
accidents.

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e) Remove any adjusting key or wrench before turning the
power tool on. A wrench or a key left attached to a rotating
part of the power tool may result in personal injury.
f) Do not overreach. Keep proper footing and balance at
all times. This enables better control of the power tool in
unexpected situations. Nonslip footwear is recommended.
g) Dress properly. Wear closed, non-flammable protective
clothing. Do not wear loose clothing or jewelry. Keep your
hair, clothing and gloves away from moving parts. Loose
clothes, jewelry or long hair can be caught in moving parts.
h) Secure Work. Use clamps or a vise to hold work when
practical. It’s safer than using your hand and it frees both
hands to operate tool.
4. Power Tool Use and Care
⚠WARNING! Use recommended accessories. Use the power
tool, accessories, abrasives, and tool bits etc., in accordance
with these instructions, taking into account the working
conditions and the work to be performed. Use of the power tool
for operations different from those intended could result in a
hazardous situation.
⚠CAUTION! Keep power tools and work space clean for
best performance and safety. Do not let sharpening debris
accumulate on, in, or around the tool. Accumulated fine metal
sharpening debris can be very hot and may present a fire danger
if the machine or your workspace is not properly cleaned and
maintained. Accumulated sharpening debris can also degrade the
life of the tool and cause premature wear on some components. If
sharpening debris has accumulated, do not immediately throw it
into a trash receptacle without ensuring the debris is completely
cool and free of heat. Improperly disposing of the accumulated
sharpening debris may present a fire risk. Do not collect the
sharpening debris during sharpening. This increases the risk of
heat build-up in the debris and the potential for fire.
a) Do not force the power tool or attachment. Use the
correct power tool for your application. Do not force small
tools to do the job of a heavy duty tool. The correct power
tool will do the job better and safer at the rate for which it is
designed.
b) Use the right tool. Do not force tool or attachment to do a
job for which it is not designed.
c) Do not use the power tool if the switch does not turn it
on or off. Any power tool that cannot be controlled with the
switch is dangerous and must be repaired.
d) Never leave tool running unattended – Turn power off.
Do not leave the tool until it comes to a complete stop.

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e) Disconnect the plug from the power source and/or the
battery pack from the power tool before making any
adjustments, changing accessories, or storing power
tools. Such preventative safety measures reduce the risk of
starting the power tool accidentally.
f) Store idle power tools out of reach of children and do
not allow persons unfamiliar with the power tool or
these instructions to operate the power tool. Power tools
are dangerous in the hands of untrained users.
g) Keep cutting tools sharp and clean for better and safer
performance.
h) Follow instructions for lubricating (if applicable) and for
changing accessories.
i) Maintain power tools. Check for misalignment or binding
of moving parts, breakage of parts and any other condition
that may affect the power tool’s operation. If damaged, have
the power tool repaired by an authorized service center
before use. Keep handles dry, clean and free from oil and
grease. Many accidents are caused by poorly maintained
power tools.
j) Inspect tool cord periodically and if damaged have
it repaired by an authorized service center. Inspect
extension cords periodically and repair if damaged.
k) Keep guards in place and in working order. A guard or
other part that is damaged should be properly repaired or
replaced by an authorized service center unless otherwise
indicated in the instruction manual.
l) Never stand on the power tool. Serious injury could
occur if the tool is tipped or if the sharpening edge is
unintentionally contacted.
m) Check damaged parts. Before further use of the tool,
any part that is damaged should be carefully checked to
determine that it will operate properly and perform its
intended function. Check the alignment of moving parts,
binding of moving parts, breakage of parts, mounting and
any other conditions that may affect its operation. Any
damaged part, including the switch, should be properly
repaired or replaced by an authorized service center.
n) Do not use if the grinding wheel is damaged. Use only
grinding wheels recommended by Drill Doctor ®

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5. Service
a) Have your tool serviced by a qualified repair person
using only identical replacement parts. This will ensure
that the safety of the power tool is maintained.
b) Do not dispose of electrical products with
household waste. Waste electrical products
should not be disposed of with household
waste. Please recycle where facilities exist.
Check with your local authority or retailer for
recycling advice.
Specic Safety Rules
⚠ WARNING! ALWAYS use proper safety glasses. Everyday
eyeglasses are NOT safety glasses. Also use face or dust mask if
operation is dusty. ALWAYS wear certified safety equipment:
• ANSI Z87.1 eye protections (CAN/CSA Z94.3)
• ANSI 512.6 (53.19) hearing protection
• NIO5H/OSHA respiratory protection
⚠ WARNING! Use of this tool can generate and/or disperse
dust, which may cause serious permanent respiratory or
other injury. Always use NIOSH/OSHA approved respiratory
protection appropriate for the dust exposure. Direct particles
away from face and body.
For Service in the USA, Contact:
Darex, LLC
PO Box 730
210 E Hersey St
Ashland OR 97520
Phone: [phone]
Fax: [phone]
Email: [e-mail]

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12
12
14
0
115V 0-25
(0-7.6m)
101-200
(30.4-60.9m)
51-100
(15.2-30.4m)
26-50
(7.6-15.2m)
Volts
6
10
10 12
12 Not Recommended
Ampere Rating
Minimum Gauge Cord Sets
Total Length of Cord in Feet
Save These Instructions
Not More Than
More Than American Wire Gauge
12 16
16
1618
1618
16
14
14
14
16
6
Motor
Be sure your power supply agrees with the nameplate marking.
115 Volts means your tool will only operate on standard 60HZ
household power. 230 Volts means your tool will only operate
on standard 50 HZ household power. Do not operate AC tools
on DC. Lower voltage will cause loss of power and can result in
overheating. Using a machine on an unmatched power source
voids your warranty.
Extension Cords
Make sure your extension cord is in good condition. When using
an extension cord, be sure to use on heavy enough to carry the
current voltage resulting in loss of power and overheating. The
Drill Doctor® has a 1.75 ampere rating. The following table shows
the correct size to use depending on cord length and nameplate
ampere rating. If in doubt use the next heavier gauge. The smaller
the gauge number the heavier the cord.

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Safety Guidelines – Denitions
It is important for you to read and understand this manual. The
information it contains relates to protecting YOUR SAFETY and
PREVENTING PROBLEMS. The symbols below are used to help you
recognize this information:
⚠DANGER! Indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
⚠WARNING! Indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury.
⚠CAUTION! Indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate injury.
CAUTION! Used without the safety alert symbol (⚠) indicates a
potentially hazardous situation which, if not avoided, may result
in property damage.
v........................
Hz.....................
Min...................
..................
.....................
.....................
volts
hertz
minutes
direct current
Class II Construction
safety alert symbol
a........................
w.......................
......................
......................
......................
rpm...................
amperes
watts
alternating current
no load speed
earthing terminal
revolutions or
reciprocations per minute
no
Safety Markings
Drill Bit Sharpener
15,000 RPM 110•120V - 60Hz - 1.75A max / 0.77A nom
-or- 220•230V - 50Hz - 0.88A max / 0.4A nom
AC Only
Tool mass including detachable parts.
DD500X/DD750X Mass: 2.65 lbs = 1.202 kg.
Includes:
(1) DD500X or DD750X unit, (1) User’s Guide, (1) wheel wrench
The label on your tool may include the following symbols:

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Noise and Vibration Emissions Values
Manufacturer: Darex, LLC
Model: DD500X/DD750X
Noise Emissions:
Ld=L+K, where the maximum K = 3.0dB (per ISO 11201)
Declared value according to ISO 4817 at operator’s position:
No load Lpa = 76.9 Loaded Lpa = 89.7
Measured Value according to ISO 3744 (half-sphere):
No load Lpa = 72.0 Loaded Lpa = 75.0
Vibration Emissions:
Measured vibration during normal work 1.9m/s2; K = 1.5m/s2U
(per ISO 5349 and ISO 5349-2)
Note#1: The declared vibration total value has been measured
in accordance with a standard test method and may be used for
comparing one tool to with another.
Note #2: The declared vibration total value may also be used in a
preliminary assessment of exposure.
⚠WARNING! The vibration emission during actual use of the
power tool can differ from the declared total value depending on
the ways in which the tool is used.
⚠WARNING! Identify safety measures to protect the operator
based on an estimation of exposure in actual conditions of use.
Intended Uses
• This drill bit sharpener is designed to sharpen twist style drill bits
3/32” - 1/2”. (DD750X will sharpen up to 3/4”.)
• Sharpening drill bits in the home or small shop.
• Use in clean and dry environments
• Use with a clean power source of the correct rated voltage and cycle.
Unintended Uses (Not permissible)
• This drill bit sharpener is not intended to sharpen chisels, screw
drivers or other similar shop tools.
• This sharpener is not intended for industrial or commercial
sharpening services.
• Not for use in wet and/or hazardous environments.
• Not for use with converters or alternate power supplies.

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You can also watch a User Video on www.drilldoctor.com to
become a sharpening expert in minutes!
Cam Pin
Sharpening
Port
Power Switch
and Cord
Grit Tube
Chuck
Point Angle
Adjustment
Plate
Bit Clamp Arms
Drill Stop
Split Point Port
Chuck Jaws
Adjustable Material
Take-O (MTO) Knob
(750X Only)
Point Angle
Adjustment
Knob
Alignment Button
Wheel
Access
Cover
Diamond Sharpening
Wheel (Inside)
Alignment Guides
(raised ns)
(white lines)
Sharpening
Guides
Alignment
Port
On750X
MTO is here
Masonry Bit
Alignment Mark
Getting to Know Your Drill Doctor ®

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The Drill Doctor® is most efficient when used to resharpen
a drill bit’s original point angle. With its standard 180° Grit
Diamond Sharpening Wheel it will sharpen high-speed steel,
cobalt, TiN-coated, carbide and masonry drill bits. Your Drill
Doctor® has been designed to sharpen the three most common
drill bit types:
Standard Point
This general-purpose point (normally
118°) is used for drilling softer materials
like cold rolled steel, aluminum, and
wood.
Split Point
Split-point bits (normally 135°) are
generally used for drilling into harder
materials, like tempered steels, hard
alloys or hard cast materials.
Masonry Bits
Masonry bits have a carbide insert
at the point and are used for drilling
materials like cement, brick, and
ceramic.
Anatomy of a Drill Bit
When viewing a well-sharpened bit
from the side, the Heel will always be
lower than the Cutting Edge; this is
called “positive relief”.
Chisel Tip Cutting
Edge
Relief
Angle
Leading
Edge
Heel
The Drill Doctor®Sharpening Process
The sharpening process includes 3 easy steps:
1. Align the bit in the Chuck.
2. Sharpen the bit (until there is no more grinding noise).
3. Split the point (optional on 118°, mandatory on 135°).
Be sure to complete each step to sharpen and split a bit and
always sharpen the bit prior to splitting it.
Identifying Basic Drill Bits

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Your Drill Doctor® allows you to sharpen bits with either the
standard 118° or the atter 135° point angle. You can also adjust
the chisel and relief angle. (Refer to section “Adjust Chisel and
Relief Angles”.)
Depending on what you are drilling in, you may choose to increase
or decrease these angles.
On The Model DD500X
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. Most
wood and soft metal applications
require 118°. Harder materials such as
stainless steel and tool steel require
135°. If you are drilling contoured
materials (such a car fender), plan on
splitting the point to prevent walking
of the bit.
Choose the angle
Loosen the Point Angle Adjustment
Knob on the right side of the
Sharpening Port and slide the metal
Point Angle Adjustment Plate to
either the standard 118° or the atter
135° point angle. Then re-tighten the
Knob. The selected angle will show in
the small window on the plate.
Choosing Your Drill Bit Point Angle
Point Angle
Adjustment Knob

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On The Model DD750X
Choose the angle
The Model DD750X has additional
advanced features that enable you
to ne-tune your bit geometry.
Loosen the Point Angle Adjustment
Knob to the right of the Sharpening
Port and slide the metal Point
Angle Adjustment Plate to
standard 118° or 135° (or anywhere
in-between, allowing you to create
the custom angle of your choice.)
Choose the point angle based on
the application (material) you’re
drilling. Then re-tighten the Knob.
Aligning the Drill Bit
Proper alignment ensures your Drill Doctor will create the correct
geometry on your bit. It also sets the drill stick-out, so that only
a small amount of material is removed during sharpening.
1. Insert bit in Chuck and
tighten
Insert the bit into the Chuck
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 DD750X features an
adjustable Material Take-O.
Refer to section: Using the
Variable Material Take-O to
learn more.
Point Angle
Adjustment Knob

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2. Insert Chuck into
Alignment Port
Press the Alignment Button down
that opens the bit clamp arms.
Insert either of the Alignment
Guides (raised ns) on the Chuck
into the 118° notch on the
Alignment Port. With the clamp
arms held open, slide the drill
bit forward until it touches the
Drill Stop. (Make sure the Chuck
is seated all the way into the
Alignment Port). Now release the
Alignment Button, releasing the
clamp arms.
When sharpening standard 118°
drill bits, align in the 118° slot.
For standard 135° drill bits, align
1-notch to the right (-) of the 118°
slot.
Alignment Button
Drill Bit
Stop
118° Alignment
Guide
3. Adjust Bit Position
Check to ensure your bit is held in
place correctly. The Clamp Arms
should be holding the drill bit at
its narrowest spot (in the utes).
If they aren’t, turn the bit slightly
until they fall into the utes. This
is an important step to proper
alignment.
Drill Bit Stop
Bit Clamp Arms

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4. Lightly Tighten Chuck
Hold onto the Chuck and
tighten the Chuck Knob until it
is snug. (Avoid over-tightening
the Chuck in the Alignment
Port as this could damage the
alignment teeth in the port.)
Press the Alignment Button
and remove the Chuck from
the Alignment Port. 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!
Sharpening the Bit
Before sharpening you should know:
•Keep the Chuck in contact with the Cam Pin at all times as
you sharpen.
• Only light pressure is required.
•You will hear a grinding noise (zzzzzzzzz) as you complete
each half-turn and each side of the bit face is ground.
•The sharpening port will rock as you rotate the Chuck.

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1. Sharpening Guides
Insert Chuck into Sharpening Port
with either of the Sharpening Guides
(white lines) lined up with the Cam Pin
on the machine.
2. Sharpen Your Bit
Rotate Chuck in a clockwise direction
(from white line to white line) until
there is no more grinding noise. Ensure
you are keeping Chuck up against Cam
Pin at all times. Your motion should be
smooth and even.
Dierent size drill bits may require a dierent number of rotations.
Continue to sharpen until you no longer hear grinding noise. This
will result in a Chisel Edge that is clean and straight and ensure the
entire surface from the Cutting Edge to the Heel is nely ground.
Note: If splitting your drill bit, do not remove from Chuck after
sharpening.
Cam Pin
Cam
Sharpening Guide
(white lines)