Drill Master 350x User manual

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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.

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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, dur-
ing 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 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 to learn to operate your Drill Doctor®
quickly and easily. I’d also like to invite you to visit our website at
www.DrillDoctor.com. There you will nd:
•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.
Matt Bernard
President, Drill Doctor ®

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English
Contents
English................................................................................................3
General Safety Rules.......................................................................4
Getting to Know Your Drill Doctor ® .....................................12
Identifying Basic Drill Bits..........................................................13
Anatomy of a Drill Bit ..................................................................13
The Drill Doctor ® Sharpening Process.................................14
Aligning the Drill Bit....................................................................14
Sharpening the Drill Bit..............................................................15
Identifying Correctly Sharpened Drill Bits...........................16
Sharpening Bits of Dierent Lengths
and Diameters ..........................................................................18
Aligning and Sharpening Masonry Drill Bits ......................18
Questions and Answers ............................................................. 20
Drill Doctor ® Maintenance......................................................22
Accessories .....................................................................................25
Warranty ..........................................................................................26
Original Instructions

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General Safety Rules
⚠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
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 the section in
this User’s Guide for part identication diagram.
The Drill Doctor ® is completely assembled.
⚠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 ammable 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.
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. Unmodied
plugs and matching outlets will reduce risk of electric shock.

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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. Keep cord away
from heat, oil, sharp edges or moving parts. Damaged or
entangled cords increase the risk of electric shock.
d) User 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
qualied 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 qualied 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 inuence 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 90 dB(A) noise emissions when in
operation.
d) Prevent unintentional starting. Ensure the switch is in
the o-position before connecting to power source and/
or battery pack, and when picking up or carrying the
tool. Carrying power tools with your nger on the switch,
or energizing power tools that have the switch on invites
accidents.
e) Remove any adjusting key or wrench before turning the
power tool on. A wrench or a key left attached to a rotating

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part of the power tool may result in personal injury.
f) Do no 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-ammable 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 dierent 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 ne metal
Sharpening debris can be very hot and may present a re 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 re risk. Do not collect the
sharpening debris during sharpening. This increases the risk of
heat build-up in the debris and the potential for re.
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 o. Any power tool that cannot be controlled with the
switch is dangerous and must be repaired.
d) Never leave tool running unattended – Turn power o. Do
not leave the tool until it comes to a complete stop.
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.

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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) Maintain power tools. Check for misalignment or binding
of moving parts, breakage of parts and any other
condition that may aect the power tool’s operation. If
damaged, have the power tool repaired before use. Keep unit
dry, clean and free from oil and grease. Many accidents are
caused by poorly maintained power tools.
h) 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.
i) Never stand on the power tool. Serious injury could occur if
the tool is tipped or if the sharpening edge is unintentionally
contacted.
j) Check damaged parts. Before further use of the tool, a guard
or other part that is damaged should be carefully checked
to determine that it will operate properly and perform its
intended function. Check for alignment of moving parts,
binding of moving parts, breakage of parts, mounting and
any other conditions that may aect its operation. 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. Have defective switches
replaced by an authorized service center. Do not use the
tool if the switch does not turn it on and o. Do not use if
the grinding wheel is damaged. Use only grinding wheels
recommended by Drill Doctor ®.
5. Service
a) Have your tool serviced by a qualied repair person
using only identical replacement parts. This will ensure
that the safety of the power tool is maintained.
For service in the USA, Contact:
Darex, LLC Phone: [phone]
210 E Hersey St Fax: [phone]
Ashland OR 97520 USA Email: [e-mail]

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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 certied safety equipment:
• ANSI Z87.1 eye protections (CAN/CSA Z94.3)
• ANSI 512.6 (53.19) hearing protection
• NIO5H/OSHA respiratory protection
⚠ WARNING! Avoid prolonged contact with dust from power
sanding, sawing, grinding, drilling, and other construction
activities. Wear protective clothing and wash exposed areas with
soap and water. Allowing dust to get into your mouth, eyes, or lie
on the skin may promote absorption of harmful chemicals.
Motor
Be sure your power supply agrees with the nameplate marking.
115 Volts AC only means your tool will operate on standard 60
HZ household power. Do not operate AC tools on DC. A rating of
115 volts AC/DC means that your tool will operate on standard 60
Hz AC or DC power. This information is printed on the nameplate.
Lower voltage will cause loss of power and can result in over-
heating.
Extension Cords
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. An undersized cord will cause a
drop in line voltage resulting in loss of power and overheating.
The Drill Doctor® has a 1.75 ampere rating (.4 ampere in E.U.; .74
ampere in Japan). 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.
The label on your tool may include the following symbols:
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. Applies to all electrical symbols
Tool mass including detachable parts.
DD350X Mass: 1.979 lbs.
Includes:
(1) 350X unit, (1) user’s guide, (1) wheel wrench
Volts
Ampere Rating American Wire Gauge
More than Not more than
Not recommended
0
6
10
12
6
10
12
16
18
18
16
14
16
16
16
12
16
14
14
14
12
12
115V
230V
0-25
(0 - 7.6m)
0-50
(1 - 15.2m)
26-50
(7.6 - 15.2m)
51-100
(15.2 - 30.4m)
51-100
(15.2 - 30.4m)
101-200
(30.4 - 60.9m)
101-200
(30.4 - 60.9m)
201-300
(60.9 - 91.4m)
Total Length of Cord in Feet
Minimum Gauge Cord Sets
Save These Instructions

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Intended Uses
• This drill bit sharpener is designed to sharpen twist style drill
bits 3/32” - 1/2”.
• Light duty twist drill sharpening in the home or small shop.
• Clean and dry (indoor use only).
• Use with a clean power source of the correct rated voltage
and cycle.
Unintended Uses (Not permissible)
• This drill bit sharpener not intended to sharpen chisels,
screw drivers or other similar shop tools.
• Sharpener is a light duty sharpener not intended for
industrial or commercial sharpening services.
• Not for use in wet and/or hazardous environments.
• Not for use with inverters or alternate power supplies.

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Alignment Fingers
White Triangle
Sharpening Guides
Cam Pin
Sharpening Port
Wheel
Access Cover
Cam
Chuck Knob
Diamond Sharpening
Wheel (Inside)
Power Switch
and Cord
®
Getting to Know Your Drill Doctor®
Chuck

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Identifying Basic Drill Bits
The Drill Doctor is most ecient when used to sharpen the
original point angle of a drill bit. With the 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:
Standard Point
This general-purpose point (normally
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.
Anatomy of a Drill Bit
It is important to understand that
each bit has a Chisel Edge, a Cutting
Edge, a Heel, a Relief Angle, and a
Leading Edge. (The Leading Edge will
be important in bit alignment.)
When viewing a well-sharpened bit
from the end, the entire surface from
the Cutting Edge to the Heel will have
a nely ground surface without ridges
or indentations. The Heel will always
be lower than the Cutting Edge; this is
called “positive relief”.
Chisel Edge Cutting
Edge
Relief
Angle
Leading
Edge
Heel
Cutting Edge
Heel

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The Drill Doctor®Sharpening Process
The sharpening process includes 2 easy procedures:
1. Aligning the bit in the Chuck.
2. Sharpening the bit.
Aligning the Drill Bit
This ensures that the Drill Doctor creates the right geometry. It
also sets the depth of the bit so that only a small amount of the
tip is taken o during sharpening.
To sharpen
Insert bit in Chuck.
1. Insert the bit into the front of the
Chuck, leaving 1/2” of bit sticking out
the front.
Tighten Chuck slightly.
2. Tighten the Chuck by turning the
Chuck Knob clockwise just to the
point where the bit is snug but can
still be slid in and out. The Chuck
should not be completely tightened
until we set the bit depth for sharpen-
ing in Step 4.
Tip: The chuck ngers must be in
the utes of the drill bit.
Align Leading Edge.
3. Rotate the drill bit in the Chuck so
that the Leading Edge of the ute is
against the Alignment Finger. This
aligns the bit for accurate sharpening.
Note: A good test to see if the Chuck
is tightened the correct amount is to
make sure it moves when you push
on it with your ngers, but will not fall
out when you turn the Chuck upside
down.
White
Triangle
Leading Edge
1/2”
Alignment
Finger

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Set depth of bit and
tighten Chuck.
4. With the machine turned o, align
the White Triangle on the Chuck with
the Cam Guide. Insert the Chuck into
the Sharpening Port. Push the Chuck
all the way into the Port. Tighten
the Chuck Knob while it’s still in the
Sharpening Port. Remove the Chuck
and make sure the Alignment Fingers
are tightly up against the Leading
Edge of your drill bit. The bit should
not move in the Chuck. Your depth is
now set and you are ready to sharpen.
Sharpening the Bit
Before sharpening you should know:
•Keep the Cam in contact with the Cam Guide as you sharp-
en.
•Only light pressure is required.
•You will hear a grinding noise (zzzzzzzzz) as you complete
each half-turn.
• The Chuck will rock as you rotate it and the Cam rides on the
Guide.
Insert Chuck.
5. Turn on the machine. Align either of
the Sharpening Guides (white lines)
on the Chuck with the Cam Guide and
insert the Chuck in the Sharpening
Port.
®
White
Triangle
Cam Guide
Sharpening
Port
Sharpening
Guide
Cam Guide

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Turn clockwise to sharpen.
Making sure that the Chuck rests
rmly against the Cam Guide, turn the
Chuck from white line to white line in
a smooth and even motion. For best
results, sharpen until there is no more
grinding noise, allowing the machine
to complete its sharpening cycle.
The number of half-turns needed to
sharpen the bit depends on its size.
• 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.
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 nely
ground surface without ridges or in-
dentations. The Heel will always be
lower than the Cutting Edge (positive
relief).
Cause
Alignment Fingers did not position
the drill bit properly in the aligning
process.
Solution
Realign the drill bit carefully by
following steps 1 through 4 under
Aligning the Drill Bit.
Heel Cutting
Edge Chisel
Point
Problem
The Chisel Edge
is ground flat.

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Cause
Too much drill bit is sticking out of
the end of the chuck.
Solution
Realign the bit. During the re-align-
ment process, be sure to keep the
White Triangle against the Cam
Guide as you insert the Chuck into
the Sharpening Port to set the depth
of the bit. The bit will move up inside
the Chuck, rotating slightly as it is
pushed into the Sharpening Port
during alignment. Push until the
Chuck is fully inserted into the Port.
Cause
Not enough rotations were made
while sharpening.
Solution
Carefully repeat the alignment and
sharpening procedure, making sure
to use light pressure to keep the
Cam in contact with the Cam Guide
during sharpening. Be sure to fully
complete the sharpening cycle by
continuing to sharpen until there is
no more grinding noise.
Cause
Too much pressure during sharpening,
dirty Chuck, or Chuck not tightened
enough.
Solution
Use just enough pressure to keep
the Cam in contact with the Cam
Guide. If the bit continues to slip,
clean the Chuck as described on
Page 23.
Problem
Problem
Problem
Heel Cutting
Edge
Relief
Angle
Surface of the
bit isn’t smooth
and/or heavy
grinding sound.
Heel same height or higher
than the cutting edge
Bit backing out or
slipping out of the
jaws when you are
sharpening

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Large Drill Bits
Large drill bits (3/8” to 1/2”) will require more half-turns of the
Chuck. A well-sharpened bit will have a smooth surface from Cut-
ting Edge to Heel. It may take two or three complete sharpenings
(repeat all steps) to re-sharpen a very dull or chipped large drill
bit.
Short Drill Bits
The new Chuck design on the 350X enables you to sharpen short
bits as easily as longer ones. Simply align the bit in the Chuck as
normal. Note that it is OK for the Chuck Fingers to come into
contact with the Sharpening Wheel. This will not damage the
Chuck.
Sharpening Bits of Dierent Lengths and Diameters

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Tighten
Tighten the Chuck while checking
that the insert is touching the end of
the Alignment Fingers. Tighten until
the bit no longer moves in the chuck.
Cam Guide
Plunge until sharp
Align the White Triangle on the Chuck
with the Cam Guide on the machine.
Plunge the Chuck into the Sharpening
Port until it contacts the Sharpening
Wheel. Remove the Chuck and rotate
one half-turn to the opposite White
Triangle. Plunge the Chuck into the
Sharpening Port again to sharpen the
other side of the carbide insert. Start
with four plunges. Inspect the bit.
Then sharpen more if needed.
White Triangle
Chuck the masonry bit.
Insert your masonry bit in the Chuck
in the same manner as other bits, but
in this case, make sure the carbide
insert is touching the
end of the Alignment
Fingers as shown.
Alignment Finger
Carbide Insert
Aligning and Sharpening Masonry Drill Bits
To sharpen a masonry bit, you do not turn the Chuck, instead
you use a plunging motion. Insert the Chuck until it touches the
wheel, remove, and repeat on the other side.

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Questions and Answers
1. Question:
Why was my drill bit sharpened improperly?
Answer:
The most common cause of improper sharpening is improper drill
bit alignment.
Key causes are:
• Chuck not pushed all the way into the Sharpening Port.
• Drill not aligned correctly.
• Chuck is dirty and the bit slipped out of alignment. See
“Cleaning the Chuck,” to correct.
2. Question:
When I aligned the drill bit and sharpened it, why was no
material removed?
Answer:
This happens when the bit is not protruding out of the Chuck far
enough. The Chuck may not have been tightened enough and
the bit may have slipped in the Chuck. Making sure it is sticking
out 1/2”, carefully realign the bit in the Chuck and set its depth in
the Sharpening Port again.
3. Question:
I sharpened the bit. Why will it not cut?
Answer:
This happens when the Heel on the bit is higher than the Cutting
Edge (negative relief ). Realign the drill bit and resharpen. Sharpen
until there is no more grinding noise.
•Maintain consistent inward light pressure during the half-turns
of the Chuck.
•You may have a specialty drill bit. Slow and fast spiral, helix,
turbo utes, and raised margin drill bits are considered spe-
cialty bits. Your Drill Doctor does not sharpen these types of
bits.