Drill Master XP User Manual

THE DRILL BIT SHARPENER

USER GUIDE

USER GUIDE

XP

GET SHARP BACK TO WORK

⚠ Caution!
To reduce risk of injury, the user must read and understand this instruction
manual before using product. Save these instructions for future reference.

AND GET

Contents

English ............................................................................................. 2

General Safety Rules ...................................................................4

®

Getting to Know Your Drill Doctor

Identifying Basic Drill Bits ....................................................... 13

Anatomy of a Drill Bit ............................................................... 13

Aligning the Drill Bit ................................................................. 14

Sharpening the Drill Bits .........................................................16

Identifying Correctly Sharpened Drill Bit ..........................17

Split Points ...................................................................................18

Identifying Correctly Split Drill Bits .....................................19

Grit Tube Attachment .............................................................. 20

Sharpening Bits of Dierent Lengths, Diameters,

and Types .....................................................................................21

Masonry Drill Bits ...................................................................... 22

Using the Variable Alignment to Adjust Chisel and

Relief Angle ................................................................................. 23

Questions and Answers .......................................................... 25

®

Drill Doctor

Maintenance ..................................................... 28

Accessories .................................................................................. 31

Warranty .......................................................................................32

................................... 12

English

Original Instructions

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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 Drill Doctor
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!

®

who design and produce

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

®

www.drilldoctor.com 3

General Safety Rules

WARNING! Read and understand all instructions.
Failure to follow all instructions listed may result in
electric shock,  re and/or serious injury. The term
“power tool” in all warnings listed herein refers to your
corded power tool.

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 – it only needs to be
mounted securely to your workbench.

WARNING! Connect to properly wired (110V 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 mount this tool to 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 equipment­grounding 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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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.

Cover of Grounded

Cover of Grounded
Outlet Box

Grounding Pin

Fig. A

Fig. B

Fig. C

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.

generate in excess of 85 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

Outlet Box

Adapter

Metal Screw

Grounding Means

Drill Doctor

Fig. D

®

unit can

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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
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

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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) 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

PO Box 730

210 E Hersey St

Ashland OR

97520

Phone: [phone]
Fax: [phone]
Email: [email protected]

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Specic Safety Rules

WARNING! ALWAYS use proper safety glasses. Everyday

eyeglasses are NOT safety glasses. Also use face of 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! 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.

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.
230 Volts AC only means your tool will operate on standard 50
HZ household power. Do not operate AC tools on DC. A rating of
230 volts AC/DC means that your tool will operate on standard 50
HZ AC or DC power. This information is printed on the nameplate.
Lower voltage will cause loss of power and can result in over­heating.

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 U.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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Not recommended

Minimum Gauge Cord Sets

Save These Instructions

Volts

115V

230V

Ampere Rating

More than Not more than

0

6
10
12

Total Length of Cord in Feet

0-25

(0 - 7.6m)

(1 - 15.2m)

0-50

(7.6 - 15.2m)

(15.2 - 30.4m)

6
10
12
16

26-50

51-100

51-100

(15.2 - 30.4m)

101-200

(30.4 - 60.9m)

American Wire Gauge

18
18
16
14

101-200

(30.4 - 60.9m)

201-300

(60.9 - 91.4m)

16

16
16
16
12

14

14

12

14

12

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 resut 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.......................

......................

n

o

......................

......................

rpm...................

amperes
watts
alternating current
no load speed
earthing terminal
revolutions or
reciprocations per minute

Safety Markings

15,000 RPM 110•120V - 60Hz - 1.75A max / 0.77A nom

-or- 220•230V - 50Hz - 0.88A max / 0.4A nom

Tool mass including detachable parts.

(1) DDXP unit, (1) user’s guide, (1) wheel wrench

Drill Bit Sharpener

AC Only

DDXP Mass: 1.979 lbs.

Includes:

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DECLARED DUAL-NUMBER NOISE EMISSION

VALUES in accordance with ISO 4871

Ld = L + K, where the maximum K = 3.0 dB (per ISO 11201)

Manufacturer: DAREX, LLC
Model: DDXP
Rated Input: 92w Hz: 50 Source: 230VAC

A-weighted emission sound pressure level, LpA
(ref. 20 µPa) at the operator’s position, in decibels:

Un-Loaded: 76.9 Loaded: 89.7
Uncertainty, KpA, in decibels: 3.0
At 1m Distance: Un-Loaded: 71.9 Loaded: 76.0

Peak C-weighted emission sound pressure level, LpC, peak
(ref. 20 µPa) at the operator’s position, in decibels:
Un-Loaded: 77.4 Loaded: 87.8
Uncertainty, KpC, peak, in decibels: 3.0
At 1m Distance: Un-Loaded: 72.7 Loaded: 75.0

Declared noise emmision value.

Intended Uses

• This drill bit sharpener is designed to sharpen twist style drill
bits 3/32” - 1/2”.

• Using factory authorized accessories this sharpener can be
expanded to sharpen twist style drill bits up to 3/4”.

• 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 converters or alternate power supply.

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Getting to Know Your Drill Doctor

®

Bit Clamp Arms

Drill Stop

Drill Bit

Alignment Button

Cam Pin

Sharpening Port

Wheel
Access Cover

Diamond Sharpening
Wheel (Inside)

Masonry Bit
Alignment Marks

Chuck Jaws

Power Switch and

Power Cord

Splitting Guide

Split Point Port

Split Point Guide Rails

Alignment Guides

(raised ns)

Sharpening Guides

(white lines)

Grit Tube

Cam

Chuck Knob

Chuck

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Identifying Basic Drill Bits

The Drill Doctor® is most ecient when used to resharpen 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:

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 are self-centering and
are generally used for 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

Chisel Edge

Heel

Leading

Edge

Cutting

Edge

Relief
Angle

When viewing a well-sharpened bit
from the side, the Heel will always be
lower than the Cutting Edge; this is
called “positive relief ”.

Heel

Cutting Edge

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.

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Aligning the Drill Bit

This makes sure 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.

Insert bit in Chuck and
tighten

Insert the bit into the Chuck Jaws and

1"

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.

1. Insert Chuck into Alignment Port

Alignment Button

Alignment

Port

Drill Stop

118˚

Press the Alignment Button down

and hold it. Match either of the

Alignment Guides (raised ns)

on the Chuck with the 118°

notch on the Alignment Port.
Insert the Chuck. While holding

the Alignment 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
Alignment Button.

Alignment
Guide

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2. Adjust Bit Position

Look at the bit and make sure the Bit
Clamp Arms are in the bit’s narrowest
spot (the utes). If they aren’t, turn the
bit until it is. This is an important step
to proper alignment.

Bit Clamp Arms

Drill Stop

3. Tighten Chuck

Tighten the Chuck Knob. Avoid over
tightening the Chuck in the Alignment
Port. This could damage the Alignment
Port.

4. Remove and Re-tighten

Press the Alignment Button and remove
the Chuck from the Alignment Port.
Tighten the Chuck once more to ensure
the bit is held securely.

You are now ready to sharpen the drill
bit.

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Sharpening the Bit

Before sharpening you should know:

• Keep the Chuck in constant contact with the Cam Pin as you

sharpen—push the Chuck straight into the Port.

• Only light pressure is required.

• You will hear a grinding noise (zzzzzzzzz) as you complete

each half-turn.

• The Sharpening Port will rock as you turn the Chuck and it rides

on the Cam.

Align Guides

Turn the Drill Doctor on. Align either of the

Sharpening Guides (white

lines) with the Cam Pin

on the machine.

Cam Pin

Sharpening Guide

Cam Pin

Insert Chuck and turn until sharp

Insert the Chuck in the Sharpening
Port. Making sure you keep the
chuck against the Cam Pin, rotate the
Chuck one half-turn in a clockwise
direction—from Sharpening Guide to
Sharpening Guide—an even number
of times. Your motion should be
smooth and even. Always sharpen
until there is no more grinding noise.

The number of turns needed to sharpen the bit depends
on the size.

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 the entire
surface from the Cutting Edge to the Heel is nely ground.

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Identifying Correctly Sharpened Drill Bits

9:00

(and what to do with those that aren’t!)

Correctly Sharpened Bits

Heel

Cutting

Edge

Chisel

The entire surface from the Cutting

Point

Edge to the Heel will have a nely
ground surface without ridges or
indentations. The Heel will always be
lower than the Cutting Edge (positive
relief).

Once you have reached spark-out (no more grinding noise at all)
take a look at your drill bit. The chisel angle should be at 1 o’clock
or 1:30.

1:00

Look at the bit: Hold
the bit up and look at it
with the cutting edges
in line with the horizon
(or parallel with the
9:00 and 3:00 position

3:00

imagining a clock’s
face).

2:00 is too far advanced,

scribe

line

and if the chisel gets too
close to 12:00, the relief
will be negative.

Too much relief will cause an oversized hole diameter and rapid
bit wear. Too little relief will limit feed rates, slowing down the
drilling operation or in extreme cases cause the drill not to
perform at all.

If chisel angle looks to be about 2 o’clock, align bit 1-2 ticks on
the minus direction.

If chisel angle is up to about 2:30, align 2-3 ticks minus.

If chisel is about 12:45, it’s at the low end of chisel and relief,
align 1 tick to positive.

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Split Points

Split point drill bits prevent walking on the material before they
begin to cut. This feature is described as self-centering. The need
to center punch is eectively 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.

Optional Step: Splitting the Point

1. 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.

2. Remove the Grit Tube

3. Align Guides

Align one of the Sharpening Guides
on the Chuck (white lines) with the
Splitting Guide on the Splitting Port.

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Splitting Port

Split Line

Split lines do not meet
in the center but
Chisel Edge remains.

Not enough material
has been removed
from the Heel of
the drill bit.

Press Chuck slowly and rmly into
the Splitting Port. Remove the chuck,
rotate one-half turn, and repeat.

Check the tip of the bit carefully to
determine that both sides of the
bit are split equally. Compare it to
this illustration. If it does not match,
study the information below.

Identifying Correctly Split Drill Bits
(And What to Do With Those That Aren’t!)

Correctly Split

Split lines are nearly straight across.

4. Split the point

Undersplit

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Solution

More grinding is needed for larger
drill bits. If one side of the bit is
under split, insert the Chuck into the
Splitting Port again and split both
sides. Repeat until the split sides are
equal and look like the correctly split
bit shown above.

Oversplit

Too much material
removed.

Split lines are joined
in the center and
Chisel Edge has
been removed.

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.

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
1-1/4” shop vacuum for extended periods of sharpening.

Never clean with an air compressor, it may damage the
machine. Use a brush or vacuum.

Grit Tube Attachment

The Grit Tube attachment is
designed to keep any sparks
caused by sharpening safely
inside the machine and away
from you. In addition, the Grit
Tube reduces the sharpening
dust in the air and on your
workbench.

Simply insert the Grit Tube
into the Splitting Port of
your Drill Doctor when

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Sharpening Bits of Dierent Lengths, Diameters,
and Types

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 the entire
surface from the Cutting Edge to Heel is nely ground.

Large Drill Bits

The Model XP sharpens bits from 3/32” to 1/2”. You can also
purchase the optional Large Bit Chuck that sharpens bits up to
3/4”.

Large bits are sharpened just like any other bit.

A large bit requires more half-turns to sharpen it.

It may take two or three complete sharpenings (repeat all steps)
to resharpen a very dull or chipped large drill bit. Using a optional
100-grit coarse wheel can speed up the process.

Short Drill Bits & Bit Smaller than 1/8”

Sharpen the small bit as usual, but use very light pressure and
an even number of turns. The bit should only briey contact the
wheel.

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Masonry
Sharpening
Marks

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. 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 lined up with the
Masonry Sharpening Marks on the
end of the chuck. Leave about 1/2”–
5/8” of bit sticking out past the nose of
the Chuck. Tighten the Chuck just to
the point where the bit slides in and
out.

2. Set the depth

Sharpening Guide

Cam Guide
Sharpening Port

Sharpening Marks and tighten again.

Set the depth by lining up
the one of the Sharpening
Guides (white line) with the

Cam Pin. Making sure the

Chuck stays against the
Cam Pin, push the Chuck

into the Sharpening Port

until it stops and tighten

the Chuck. Remove the

Chuck to ensure the insert

is aligned with the Masonry

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3. Sharpen by “plunging”

Line up the Sharpening Guide
(white lines) on the Chuck with the
Cam Pin on the machine. Plunge
the Chuck into the Sharpening Port
until it touches the Sharpening
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

Cam

Cam Guide Sharpening Guide

continue until the cutting surfaces
are sharp.

Using the Variable Alignment to Adjust the
Chisel and Relief Angles

The Model XP enables you to adjust the Chisel and Relief Angles
of your drill bit. The Chisel and Relief Angles have a direct eect on
the performance of your drill. By increasing the Relief Angle, you
can increase the speed of the drill in softer materials. To improve
the quality of the hole you can adjust the drill to be less aggressive.
A less-aggressive drill has a lower Chisel and Relief Angles. Your
Drill Doctor enables you to adjust both angles in one setting.

Chisel Edge

Heel

Cutting

Edge

1. Chuck bit as usual

To prepare your bit for this ne
adjustment, follow all the Steps for

Leading

Edge

Relief

Angle

chucking your bit given previously in
this User’s Guide.

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2 . Insert Chuck into Alignment Port

+

118˚

–

To adjust the Chisel and Relief Angles,
simply align the bit as usual with the
following adjustment:

To increase relief, insert the Chuck into
the Alignment Port so that the Align­ment Guides (raised ns) are notched
into one of the slots towards the (+)
symbol. This will make a more aggres­sive drill point.

To decrease relief, insert the Chuck
into the Alignment Port so that the
Alignment Guides (raised ns) are
notched into one of the slots towards
the (-) symbol. This will make a more
precise hole. Take care not to adjust

Relief too far as this will actually

cause the drill to lose all Relief and

therefore not drill a hole.

Each notch in the Alignment
Port is approximately a 10°
change in Chisel Angle.

3. Tighten Chuck, and sharpen
as usual

Refer to section "Sharpening the Bit"
for these Steps. Experiment with a few
dierent settings to nd the one that
best suits your drill bits and applica­tion. You may nd it helpful to mark
this setting for future use.

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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 inserted into the Sharpening Port correctly. Ensure

the Alignment Guides (raised ns) are tted into the correct
alignment slot.

• Drill not aligned in the Chuck Jaws correctly.

arms are holding in the narrowest part of the bit.

• The type of drill requires an angle adjustment to achieve

the desired Chisel and Relief Angles. Try using the Variable
Alignment to adjust the Chisel and Relief Angle.

• Chuck is dirty or the bit slipped out of alignment.

See “Cleaning the Chuck.”

Ensure bit clamp

2. Question:

When I aligned the drill bit and sharpened it, why was no
material removed?

Answer:

Your sharpening tube may not be fully seated. Make sure the
small, black sharpening cup is sitting ush in the Sharpening Port.

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). You may not have sharpened long enough,
make sure to sharpen until there is no more grinding noise.

You may have a specialty bit that requires dierent alignment.
See section "Using the variable Alignment to Adjust Chisel and
Relief Angle".

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4. Question:

What can I do about at spots on the bit point between the
Cutting Edge and the Heel?

Answer:

The at spots on a sharpened bit are the result of an incomplete
or paused half-turn of the Chuck in the Sharpening Port. To
correct, apply light, inward pressure and rotate the Chuck
smoothly while sharpening. Be sure to complete the half-turns.

5. Question:

Why is the drill point o center?

Answer:

If the tip of the drill bit appears to be sharpened o center, check
the following items:

• Make sure there are no particles between the Chuck

Jaws and the drill bit that could hold it o center.

• Check the drill to ensure it is free of burrs.

• Your drill bit may be bent.

6. Question:

Why is the Chisel Edge on my drill bit at or rounded?

Answer:

• During the alignment process the Bit Clamp Arms were

gripping the high points of the drill bit. Realign the drill bit
making sure that the Bit Clamp Arms are holding the drill bit in
the narrowest section of the bit.

• You may have aligned using the Sharpening Guides (white

lines) instead of the Alignment Guides (raised ns). Make sure
to insert either of the raised ns into the correct alignment slot.

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7. Question:

Why is my split point uneven?

Answer:

You may have used uneven pressure during the splitting process.
To correct an uneven point split, insert the Chuck into the Split­ting Port and split both sides again. Repeat until the split sides
are equal.

8. Question:

Why does the drill bit back up into the Chuck during the
sharpening procedure?

Answer:

• Your Chuck may be dirty. Follow the steps for cleaning the

chuck.

• Your bit may have been loose in the Chuck. Make sure to

tighten adequately before sharpening.

9. Question:

When splitting, why don’t I hear a grinding sound?

Answer:

The Chuck is not seated properly in the Splitting Port. The Chuck’s
Sharpening Guide must line up with the Splitting Guide on the
top of the Split Point Port. Firmly and slowly push the Chuck into
the hole until you hear grinding.

10. Question:

Can I change a 135° drill bit into a 118° drill bit?

Answer:

While you can change the degree angle of any drill bit, they
will perform best when sharpened at the same angle they were
manufactured.

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Drill Doctor® Maintenance

After sharpening 20 to 25 drill bits, the drill bit grinding dust will
accumulate in the grinding compartment. Grinding particles will
promote wear in the Sharpening Port and Chuck, so cleaning
on a consistent basis can add life to your machine. Before any
maintenance or cleaning is performed, be sure to disconnect your
Drill Doctor.

Removing the Wheel Access Cover

With the Drill Doctor unplugged, use your nail or the tip of your
nger pull the Wheel Access Cover. To close, insert the Cover in
the slots and snap it back into place.

Cleaning Your Drill Doctor

With the Drill Doctor unplugged, shake accumulated drill bit
grinding dust from behind the Wheel Cover into a disposable con­tainer. Remove dust particles around the wheel with a small, dry
brush. Dispose of the container and drill bit dust in a safe and en­vironmentally approved manner. With a dry cloth wipe the inside
and outside of the Sharpening Port to remove any grinding dust
that may have accumulated. A standard 1” vacuum hose works
equally well.

Cleaning the Chuck

Brush out with a small, dry brush.

®

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Determining if Replacing the Diamond Grinding
Wheel Is Required

You can double the life of the Diamond Sharpening Wheel by re­versing it before you replace it. The Sharpening Wheel supplied
with the Drill Doctor® is designed to give you long and trouble free
service, with an average of more than 200 sharpenings for 3/32”
to 1/2” drill bits.

The Sharpening Wheel may need to be changed if:

• Your drill bit has a shiny, mirror nish.

• Your drill bits burn or turn blue on the tip.

Contact the store or dealer where you purchased the machine,
or contact Drill Doctor® directly, to purchase a replacement
Sharpening Wheel.

Reversing or Replacing Your Diamond
Sharpening Wheel

1. Unplug your Drill Doctor,
make sure machine is cool,
then remove wheel cover.

Wheel Access Cover

2. Use wrench supplied with
your Drill Doctor to hold
sharpening wheel in place.

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3. With Phillips-head screw­driver, remove the two screws
and wheel retainer.

4. Remove worn wheel by twist­ing slightly and lifting wheel
o hub. Install new wheel and
reinstall wheel retainer and
screws. Don’t over-tighten
mounting screws. Remove the
wrench and replace the Wheel
Access Cover before turning
on the machine.

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Accessories

Order accessories by contacting us at the phone number listed on the
back cover, or at the retailer where you purchased your Drill Doctor

3/32” to 3/4” Large Bit Chuck

Part # DA70100PF

3/32” to 1/2” Left-handed Bit Chuck

(for 3/32”-1/2” reverse twist drill bits)

Part # DA02105PF

Standard Diamond Sharpening Wheel Kit (180 grit)

Coarse Diamond Sharpening Wheel Kit (100 grit)

Part # DA31320GF

Part # DA31325GF

WARNING:

The use of any accessory other than one recommended
in this user’s manual may present a risk of personal injury.

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Drill Doctor® Warranty

Darex, LLC warranties your Drill Doctor to be free of defects due
to workmanship or design for 3 years from the date of purchase.

For warranty service, contact your dealer with sales receipt.

www.drilldoctor.com32

www.drilldoctor.com 33

THE DRILL BIT SHARPENER

DAREX, LLC

P.O. BOX 730

210 E. Hersey St.

Ashland, OR 97520

USA

Phone

1-800-597-6170

Fax

541-552-1377

Web

www.DrillDoctor.com

Drill Doctor

®

is a registered trademark of DAREX, LLC

PP41121KF Rev 0 8/18