Darex XT-3000 User manual

1
®
Operating
Instructions
CAUTION: To reduce the risk of injury, the user must read and understand this
instruction manual before using this product. Save these instructions for future reference.

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Table of Contents
The Darex Story .................................................................................... page 2
Safety Instructions ............................................................................... page 3
XT-3000 Specification Sheet................................................................. page 5
Capabilities & Performance .................................................................. page 6
XT-3000 Reference Drawing................................................................. page 7
Setting Up the XT3000.......................................................................... page 8
Drill Alignment...................................................................................... page 9
Drill Sharpening .................................................................................... page 12
Drill Point Splitting ............................................................................... page 14
Chuck Information................................................................................ page 16
Wheel Information................................................................................ page 18
General Maintenance ............................................................................ page 21
Trouble Shooting Section...................................................................... page 24
Drill Nomenclature................................................................................ page 25
Wiring Diagram..................................................................................... page 26
Electrical Diagram................................................................................. page 27
Chuck Parts List .................................................................................... page 28
Exploded View - Chuck ......................................................................... page 29
Parts List - Machine Rev B Serial Number ............................................ page 30
Exploded View - Machine Rev B Serial Number .................................... page 31
Exploded View - Sharpening Fixture 118°-150° (All Models)............... page 32
Exploded View - Alignment Schematic Rev B Serial Number................ page 33
Parts List - Machine Rev A Serial Number ............................................ page 34
Exploded View - Machine Rev A Serial Number .................................... page 35
Exploded View - Alignment Schematic Rev A Serial Number................ page 36
LEX050 - Large Drill Attachment .......................................................... page 39
LEX100 - XY Table Attachment ............................................................. page 43
LEX150 - Countersink Attachment........................................................ page 44
LEX200 - Brad Point Attachment .......................................................... page 48
LEX250 - Step Drill Attachment ............................................................ page 50
L
LEX350 & 351 - Mini Attachment........................................................... page 58
EX300 - 90º - 120º Drill Attachment................................................... page 54
XT3000 Auto Sharpener Attachment..................................................... page 61
*For Technical Service visit our web site at www.darex.com
Or call Darex 800-547-0222
Or contact your Darex Distributor

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The Darex Story
Darex Corporation began in 1973 in Beecher, Illinois. The D, A and R of Darex are the initials of three
generations of the Bernard family; David, Arthur and Richard Bernard. David and his father Richard
founded Darex. Grandfather Arthur Bernard, who earlier founded the Bernard Welding Company,
contributed his energy and guidance to Darex. Art’s inventions revolutionized the welding industry.
In 1978, Darex relocated to Ashland, Oregon. Grandson Dave and son Dick carry on Arthur’s legacy of
inventiveness. Darex grew to become the most recognized name in the cutting tool sharpening
industry. Today, Darex is a world-leading manufacturer of precision cutting tool sharpeners.
Darex is proud to offer a complete line of quality precision cutting tool sharpeners at affordable prices.
Before our first days, we at Darex had looked at our competitor’s sharpeners and asked ourselves:
“Must cutting tool sharpeners be complicated? Why must the choice be limited to cost prohibitive
accuracy or low price inaccuracy?” Our sharpeners prove you can have it all: Simplicity, Accuracy,
and Affordability.
We have always emphasized innovative product design and tested technology. The experienced
personnel at our modern manufacturing facility use the latest production methods. The Darex
marketing team knows first-hand the machines we sell and will guide you to the best machine for
your needs. Our skilled technical service department is happy to answer your questions about our
products or cutting tools.
The XT-3000 Sharpener
The Darex XT-3000 Xpandable Drill Sharpener sharpens standard and split point drills at any angle
from 118 to 150 degrees. It sharpens drills sized from 3mm to 21mm. (.118 - .826) This sharpener
comes standard with CBN wheels for sharpening HSS and cobalt drills. Diamond wheels for
sharpening carbide drills are available as an option. The XT-3000 allows you to control each drill’s
point configuration including the relief and design of the split point. All adjustment and attachment
changes are done without tools. To keep your Darex XT-3000 in top condition, please refer to the
maintenance section of this manual.
Replacement wheels and parts are listed in the parts list on page 30. Schematic breakdowns begin
on page 31 of the manual.
*Optional accessories allow you to sharpen other cutting tools; including 90° spot drills, step drills,
brad points, larger drills, Weldon, single flute, 3 flute, 6 flute countersinks and left hand drills.

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Safety Instructions
FOR YOUR OWN SAFETY, READ INSTRUCTION
MANUAL BEFORE OPERATING MACHINE!
Caution:
• WE DO NOT RECOMMEND OPERATING
MACHINE WITHOUT A VACUUM SYSTEM
RUNNING
• GRINDING DUST INHALED/INGESTED
CAN BE HARMFUL TO YOUR HEALTH.
• GRINDING PARTIALS WILL CAUSE
DAMAGE TO THE INTERNAL
COMPONENTS
Caution:
WHEN USING ELECTRIC TOOLS, BASIC SAFETY
PRECAUTIONS SHOULD ALWAYS BE FOLLOWED
TO PREVENT THE RISK OF FIRE, ELECTRIC
SHOCK AND PERSONAL INJURY, INCLUDING
THE FOLLOWING:
• WHEN MAINTENANCE OR MACHINE
ADJUSTMENTS ARE PERFORMED ON
SHARPENER ALWAYS: Push the emergency
stop button, unplug unit from power supply
and use a “LOCK OUT” “TAG OUT” procedure.
• FOLLOW INSTRUCTIONS ENTITLED
“DAREX XT-3000 Maintenance" in this
Instruction Manual.
• NEVER TOUCH INTERNAL PARTS OF THE
SHARPENER WHEN THE SHARPENER IS
ON The rotating grinding wheel can cause
injury.
• USE CAUTION WHEN REPLACING THE
GRINDING WHEEL Follow instructions
entitled “How to change a wheel”, on page 18
of this Instruction Manual.
• KEEP GUARDS IN PLACE and in working
order. See Decal at left.
• REMOVE WRENCHES Always check to see
that any tools have been removed from
sharpener before turning it on.
• KEEP WORK AREA CLEAN Cluttered areas
and benches invite accidents.
• DON'T USE IN DANGEROUS
ENVIRONMENT Do not use power tools in
damp or wet locations, or expose them to rain.
Do not use tools in the presence of flammable
liquids or gases.
• KEEP WORK AREA WELL LIT
• STORE EQUIPMENT in a safe place when not
in use.
• DON'T FORCE TOOL It will do the job better
and safer at the rate for which it was designed.
• USE THE RIGHT TOOL Don’t force tool or
attachment to do a job it was not designed for.
• AVOID ACCIDENTAL STARTING Make sure
switch is in the “OFF" position before plugging
it in.
• USE RECOMMENDED ACCESSORIES
Consult the owner's manual for recommended
accessories. The use of improper accessories
may cause hazards. See Decal at left.
• CHECK FOR DAMAGED PARTS Before
further use of the tool, a guard or other part
that is damaged should be carefully checked to
assure 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 affect its operation. A
guard or other part that is damaged should be
properly repaired or replaced.
• NEVER LEAVE TOOL RUNNING
UNATTENDED Turn power off.
• USE PROPER EXTENSION CORD Make sure
extension cord is in good condition. When using
an extension cord be sure to use one heavy
enough to carry the current the Drill Sharpener
will draw. An undersize cord will cause a drop in
line voltage, resulting in a loss of power and/or
overheating.
• DO NOT USE DAMAGED OR UNSHAPED
WHEELS Use grinding wheels suitable for speed
of grinder.
• THE CONTINUOUS A-WEIGHTED sound
pressure level at the operator’s ear is not over
60dB (A).
• RISK OF INJURY DUE TO ACCIDENTAL
STARTING. Do not use in an area where
children may be present.
• THE WEIGHTED ROOT MEAN SQUARE
ACCELERATION VALUE to which the arms are
subjected to does not exceed 2.5 m/s2.
Safety Instructions
230v~,50Hz,6A
230v~,50Hz,8A
• WARNING: This product contains a chemical
known to the State of California to cause cancer.
Some dust created by power sanding and grinding
as well as contents from the machine may contain
chemicals known to the State of California to cause
cancer, birth defects or other reproductive harm.
• TO MINIMIZE THE RISK OF INJURY, ALWAYS
USE PROPER EYE AND REPIRATORY PROTECTION:
Everyday eyeglasses only have impact resistance lenses
and they are NOT safety glasses. (See Decal at left.)
Use appropriate respiratory face or dust mask.

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GROUNDING INSTRUCTIONS
• FOR ALL GROUNDED CORD CONNECTED
TOOLS:
• In the event of a malfunction or breakdown,
grounding provides a path of least resistance for
electric current to reduce the risk of electric
shock. This tool is equipped with an electric cord
having an equipment-grounding conductor and a
grounding plug. The plug must be plugged into a
matching outlet that is properly installed and
grounded in accordance with all local codes and
ordinances. Do not modify the plug provided if it
will not fit the outlet, have the proper outlet
installed by a qualified electrician. 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 a live terminal. Check
with a qualified electrician or serviceman if the
grounding instructions are not completely
understood, or if in doubt as to whether the tool
is properly grounded. Use only 3-wire extension
cords that have 3-prong grounding plugs and 3-
pole receptacles that accept the tool’s plug.
Repair or replace damaged or worn cord
immediately.
• GROUNDED, CORD-CONNECTED TOOLS
INTENDED FOR USE ON A SUPPLY CIRCUIT
HAVING A NOMINAL RATING LESS THAN
250 VOLTS: See Table 1 for minimum gauge
cords.
Table 1 Minimum Gauge Cords
Volts
120 V 25 / 7.5 50 / 15 100 / 30 150 / 45
240 V 50 / 15 100 / 30 200 / 60 300 / 90
M ore than Not more than
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12
Total length of cord (feet / meters)
Ampere Rating
AWG
Not Recommended

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XT-3000
DRILL SHARPENER
XT-3000 Features
The XT-3000 was designed incorporating Versatility, Simplicity & Expandability. Optional attachments
sharpen other cutting tools including step drills, brad points, larger drills, Weldon and single flute
countersinks. This unit is an upgrade-able sharpener that grows with your needs. Simplicity will allow
multiple users successful results with minimal training.
Specifications for 115V & 230V
· Standard Grinding Wheels: 180 Grit CBN - HSS, Cobalt & 180 Grit Diamond - Carbide
· Max Wheel Diameter: 6.45 inch ( 164 mm)
· Arbor Size: 1.25 inch (31.75 mm)
· Wheel Surface Speed: 75 ft/sec (23m/sec) for 60 Hz Model 115V
95 ft/sec (29m/sec) for 50 Hz Model 230V
· Motor Specs: ¼ hp - 2850 rpm – 60 Hz Model 115V
¼ hp - 3450 rpm – 50 Hz Model 230V
· Operating Time: Continuous Duty
· Voltage: 115 VAC +/- 10% & 230 VAC +/- 5%
· Frequency: 60 Hz +/- 5% - Model 115V
50 Hz +/- 5% - Model 230V
· Sharpener Current: 2.5A Run / 40A Start Model 115V
1.6A Run / 25A Start Model 230V
· Accessory Current: 6.0A Run Max.
· Operating Temperature: 40° to 95° F ambient (4° to 35° C)
.Humidity: Non-condensing
XT-3000 Specification Sheet

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Capabilities & Performance
• Drill Types: Two fluted HSS, Cobalt or Carbide SAE & Metric twist drills
• Drill Point Styles: Standard Conic & Split Point
• Split Point Styles: Standard X split
• Point Angles: 118° - 150°
• Drill Diameter: 3 mm - 21 mm (.118 to .826)
• Lip Height Accuracy: ANSI B94.11, NAS 907 and ISO 10899 Standards
Capabilities & Performance
Decal Identifications
“Wear Safety Glasses” -
Accessory receptacle capacity -
“Do not operate without
wheel guard cover” -
115v~,50Hz,6A
115v~,50Hz,8A

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XT-3000 Reference Drawing
230V Units Only

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The XT-3000 comes equipped with grinding wheels, a
sharpening fixture and 2 chucks, 1; 3mm – 12mm & 1; 12mm
– 21mm.
1. Remove from shipping box and all packaging
material before powering up the machine. NOTE:
Due to the weight of the XT-3000, it is suggested that
the lip of the casting,located above the motor, can be
used as a handle for lifting.
2. Located at the back and on the right side of the
XT3000 is the power receptacle. Within that
receptacle you will find a power inlet and accessory
receptacle.
3. The power inlet is located at the bottom
of the power receptacle.
Plug the power cord in to the power inlet and then in
to the power outlet source.
4. The accessory receptacle is located at the
top of the power receptacle and will allow
you to use a dust extraction system in
conjunction with the use of the XT3000.
*We highly recommend the use of a
vacuum when the machine is in use.
Darex offers a vacuum system compatible
with your XT3000. Call Darex for more information.
• SA12075EA - 115V
• SA12072EA - 230V
5. Make sure the grit tray is in
place and secure.
6. Un-box the chucks.
7. Make sure sharpening fixture is secured to base. For
more information on mounting the sharpening
fixture. See
page 12.
8. To power on
the machine,
push the rocker
switch to the
ON position to
start the
grinding wheel
in motion.
9. To sharpen a drill follow steps in the next three
sections; Align, Sharpen and Point Splitting.
Setting up the XT3000

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The alignment port is located on the left side of
the XT-3000.
The first stage to sharpening a drill starts with
the alignment process. In the alignment
process, you will go through a few necessary
steps prior to sharpening. Setting the material
removal amount, adjusting the alignment tube
to produce desired relief amount. Use the
Darex easy align to set the drill to length and
time the cutting edge.
Setting Material Removal
Amount
1. Rotate the material removal
knob to adjust the amount of
stock you want to remove from
the end of the drill. Stock
removal ranges from approximately .010 -
.030. Remove more material if the drill is
excessively worn or damaged. Remove less
material if you are
renewing the drill.
2. Rotate the
material removal
knob clockwise to
decrease the
amount of material
removal
Tip:
Sharpen drills
on Minimum MTO to
achieve longer
wheel life.
or counterclockwise to
increase material
removal.
Setting Alignment Tube for Desired Heel
Relief
To increase or
decrease the amount of
heel relief produced
during sharpening,
change the position of
the alignment tube.
1. Lift the
alignment
locking
lever.
This will
allow you
to rotate
the alignment tube in either direction.
2. To increase heel relief, rotate the
alignment tube counterclockwise.
Drill Alignment
118°135°
118°135°

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To decrease heel relief, rotate clockwise.
3. To secure the alignment position,
tighten locking
lever.
Setting the
drill to the
proper length
1. Holding the chuck
in a horizontal
position insert the drill into the appropriate
sized chuck. (Sizes are on the cam)
Allow the drill to protrude approximately 2
inches as shown.
2. Rotate the chuck knob clockwise, which
closes the chuck jaws onto the drill. Then
slightly loosen the chuck jaws by rotating
the chuck knob counterclockwise, about ½
turn. To determine how tightly the drill
should be held during the alignment
process, the drill should slide freely and
drop out when the chuck is held in a
vertical position.
Timing the cutting edge
3. Insert the
chuck and drill
into the
alignment tube.
Align the cam dogs with the slots.
The cam dogs should bottom out against
the slots.
Drill Alignment
2”
118°135°

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The pawls should be seated in the helix of
the drill. If incorrect, loosen chuck knob
and repeat step 4. The jaws are most likely
gripping the drill body too tightly and will
not allow the drill to rotate into position.
6. Once the drill has been aligned correctly
and without releasing the slide handle,
tighten the chuck knob clockwise until the
chuck jaws grip the drill securely. Release
the slide handle and remove chuck from
alignment tube.
4. S-L-O-W-L-Y
squeeze
together the
red slide
handle until it
touches
casting. We
emphasize
slowly,
because
squeezing the
handles too
quickly pushes
the drill too
deeply into
the chuck.
NOTE: If this happens, the drill will not
touch the wheel during the sharpening
process.
5. With the handles held together, look
through the viewing port and see if drill is
positioned correctly.
Drill point should be
touching the end of
the pusher shaft cap.
CORRECT INCORRECT
Drill Alignment

12
The Sharpening fixture is located on the right
side of the machine.
Mounting the Sharpening fixture
1. Rotate the locking lever so the flat edge is at
the top, horizontal and in a straight line with
the base casting.
2. Position the sharpening
fixture so that the 2
location holes on the
base of the alignment fixture are aligned
with the 3/8 dowel pins.
3. After sharpening
fixture is in place,
rotate the locking
lever clockwise until
snug. This will secure
the fixture to the base.
Adjusting the Point Angle
You must loosen the
sharpening fixture and
slide the point angle
indicator to the desired
degree.
1. To loosen, pull
the locking
lever towards
you.
2. Place fingers on each
side of the sharpening
pivot base casting.
3. Gently slide base
casting in either
direction to align
the angle
indicator with the
desired point angle
degree.
4. Secure the selected
point angle position by
pushing the locking
lever away from you
until it stops.
5. Before sharpening, make sure the sharpening
fixture is secure and no longer slides in either
direction.
Drill Sharpening

13
WARNING: Make sure Split Port Cover
and Eye Shield are in place before
sharpening. (International Models Only)
Power up machine
To turn the machine on, push the top of the
rocker switch. The machine will power up and
the grinding wheels will begin to rotate.
Sharpen
1. To make sure
the drill clears
the wheel, push
the sharpening
tube all the way
to the left
before inserting
chuck.
2. Insert the chuck
with the thickest
part of the cam
touching the
swing bearing.
3. Release sharpening tube very slowly.
4. With slight
pressure
towards the
grinding wheel,
rotate the
chuck 360
degrees,
several times in
a clockwise
direction. To
achieve an
efficient and
balanced
sharpening on
both cutting
edges, avoid stopping when the drill is in
the grind. Do not reposition your hand in
mid-sharpening, wait until the drill rotates
off the wheel. Continue rotating the chuck
in 360 degree rotations until the grinding
noise is minimized to a near silence.
5. Before removing the chuck, push the
sharpening tube to the left, remove
chuck. Release sharpening tube slowly.
Drill sharpening

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The Point Splitting Port is located in the center
of the machine.
Approximately 3-7° rake is created, producing a
drill with a self-centering point. Its advantages
are the ability to reduce thrust and eliminate
walking at the drill point. This is a distinct
advantage where drill bushings/fixtures are not
used.
Splitting
Upon completion of
the sharpening
procedure, Do Not
loosen the drill in the
chuck. Insert the
chuck into the point
splitting port. Align the
cam dogs with the
slots on the point split
tube. Let the weight of the chuck ease the drill
down and onto the grinding wheel. With slight
pressure, be sure the chuck stays seated in the
point splitter.
When the grinding noise is
reduced to near silence pull the
chuck out about 1/2 way and
rotate it 180 degrees to split
the opposite side of the drill
point.
NOTE: Do not force the chuck into the grinding
wheel or damage to the drill or wheel may
occur.
Adjusting the Depth of Split
The depth of split can vary from drill
manufacturer to drill manufacturer. The point
split depth adjustment
feature designed on the
XT-3000 makes it easy to
mimic multiple split
styles. The point split
depth adjustment lever is
attached to the point
split chuck tube. As you
move the lever, it backs the chuck tube away
from the wheel or moves it
closer into it.
1. Located on the underside
of the point splitter is the
point split depth
adjustment lever.
2. To increase the
depth of split, push
lever to the left
toward the + sign.
This will allow the
drill to travel deeper
into the wheel,
increasing the depth
of split.
3. To decrease the
depth of split, push
the lever to the right
toward the – sign.
This will back the
drill away from the
wheel.
NOTE: To correct a drill that has been split
deeper than desired, you will have to regrind the
drill beyond the over split portion before splitting
again.
Drill Point Splitting
POINT SPLIT DIAGRAMS
DEPTH OF SPLIT DIAGRAM
Past Center To Center Below Center

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split angle adjuster
clockwise to
increase the split
angle.
3. Rotate the adjuster
counter clockwise
to decrease the
split angle.
4. Once split angle adjustment has been
made, rotate the point split nut clockwise
to retain the selected setting and secure
the point split angle adjuster.
Adjusting the Split Angle Rotation
Typically the split angle of a drill is 120° - 130°
from the cutting edge. By increasing the rotation
of the split angle, the split portion of the drill
meets the cutting lip at a greater angle, which
will give the drill more strength and durability.
This added split angle creates a pointed profile
at the very center of the drill, producing a self-
centering effect and reduces drill point walking
at the start of a hole.
1. Loosen the point
split nut by
rotating the nut
counterclockwise.
2. Rotate the point
Pointed Flat
POINT SPLIT ANGLE
DIAGRAM
Drill Point Splitting
135°118°
135°118°
135°118°
95 °
10 5°
12 0°
13 0°

16
A regular maintenance program should
be set up for each chuck. Keeping your
chuck clean and grit free will help
maintain drill concentricity and lengthen the life
of your chucks. For detailed cleaning
instruction, See Maintenance page 22.
XT-3000 CHUCKS
The XT-3000 jaw chuck system was designed
with accuracy and simplicity in mind. As a result,
the XT-3000 chuck allows you to cover a large
diameter range of drills without the aid of
individual collets. You can quickly change from
the largest drill diameter to the smallest in
seconds. The accuracy of the chuck will produce
drills that exceed ANSI, NAS 907 & & ISO 10899
standards. The various chucks and accessories
have drill diameter capabilities that range
from .059” – 1.1875” (1.5mm to 30mm).
Make sure large drills are secure
after tightening the chuck.
Morse Taper drills:
To secure a Morse Taper drill in the chuck, it is
necessary for the drill to have a minimum flute
length of 4.000 inches. The taper will then be
free from the grasp of the jaws, eliminating
interference with the larger tapered shank. The
other option for holding these types of drills is a
split bushing. Bush the body of the drill up to or
larger than the interfering diameter.
End Mill shank drills:
Typically, an end mill drill has a shank diameter
larger than the body of the drill.
Some End Mill shank drills can be sharpened on
the XT-3000, depending on the length of the
flute verses the length of the shank.
CHUCK DISASSEMBLY &
MAINTENANCE
The use of a dust extraction system
during grinding will help reduce the
amount of maintenance, however, the
chuck assembly should be disassembled and
cleaned periodically.
We recommend the
Darex dust extraction system.
1. Place flats of chuck body into a vice, do not
over tighten.
2. Place chuck
wrench,
PP16480SF,
(optional) on
dogs of chuck
knob assembly.
Rotate wrench
counter-
clockwise to
remove chuck
knob/jaw
assembly from
chuck body.
3. Using a 2.5 mm hex
wrench remove set screw.
4. The internal
pieces must
remain keyed, in
order to remove
the closing screw
from the chuck
knob assembly.
Insert the 2.5
mm wrench into
the set screw
hole.
Chuck Information

17
the closing screw exits the knob assembly.
8. The chuck knob assembly does not come
apart from this point.
TO REASSEMBLE:
Reassemble in reverse order.
CHUCK DESCRIPTIONS AND PART #’S
SA16400TA - 3-12 mm Standard Chuck
SA16450TA - 12-21mm Standard Chuck
SA16500TA - 21-30mm Large Drill Chuck
SA16975TA - 3-12mm Step Drill Chuck
SA16980TA - 12-21mm Step Drill Chuck
SA16890TA - 3-12mm 90° Chuck
SA16880TA - 12-21mm 90° Chuck
SA16916TA - 3-12mm Brad Point Chuck
SA16918TA - 12-21mm Brad Point Chuck
SA16484TA - 3-12mm Left Hand Chuck
SA16488TA - 12-21mm Left Hand Chuck
SA16401TA - 1.5-7mm 1.5-7mm Chuck
SA17010TA - 3-12mm Auto Geared Chuck 3-12mm
SA17025TA - 12-21mm Auto Geared Chuck 12-21mm
Chuck Information
5. Rotate chuck knob
counter clockwise
until the wrench
reaches the top of
the slot.
6. Remove wrench and
reinsert into the set
screw hole above the
slot.
7. Rotate the chuck knob counterclockwise until

18
The Darex XT-3000 comes equipped with
electroplated CBN (Cubic Boron Nitride). Optional
Diamond wheels are available. The wheel comes
installed on your sharpener ready to sharpen
drills.
Sharpening with an electroplated CBN (Cubic
Boron Nitride) or Diamond grinding wheel reduces
grinding cost and improves quality of the finished
product. These results are obtained because the
grinding material is super abrasive. The CBN is
second only to diamond in hardness. In fact, CBN
has twice the hardness and four times the
abrasion resistance of an aluminum oxide grinding
wheel. The CBN and Diamond wheel last longer;
the grinding process is faster and less grinding
time is lost due to wheel breakdown &
maintenance.
WHEEL MAINTENANCE
These wheels are maintenance free from truing
and dressing but will need to be cleaned
periodically. Disconnect the power from
the machine using a lock out tag out
procedure. After removing the wheel from the
sharpener, saturate the wheel with any type of
oil-less solvent, such as Automotive Brake
Cleaner. It is helpful to use a soft bristle brush
and lightly brush the saturated wheel, loosening
the impacted grinding particles. Re-saturate the
wheel to flush out any loosened debris. Do not
use any type of dressing tool on these wheels.
Damage to surface will occur and greatly shorten
the wheel life.
NOTE: If after cleaning wheel, the drills still
discolor or burn, the wheel life may be exhausted
and the wheel will need to be replaced.
WHEEL DESCRIPTIONS AND
PART#’S
• PP16050GF – 180-grit CBN grinding wheel
• PP16060GF – 100-grit CBN Point Split
grinding wheel
• PP16052GF – 180-grit Diamond grinding
wheel
• PP16062GF – 260-grit Diamond Point Split
grinding wheel
• PP16070TF – Grind wheel retainer
Do not attempt to grind carbide drills
with CBN wheels. Diamond wheels
are available if carbide is to be sharpened
on this machine.
WHEN TO REPLACE THE
WHEEL?
Eventually, the long-life electroplated wheel in
your XT-3000 will wear out. Indicators that a
wheel change is necessary are: a drop in
performance such as drill burning or excessively
slow sharpening time. Inspect the wheel for
abrasive quality. A worn wheel will appear
smooth. If it is necessary, replace the worn
wheel(s). New wheels will initially produce a
coarser grind. However, this aggressiveness will
disappear after approximately the first one
hundred drill sharpenings. Under normal use,
you should experience 4-6 thousand drill
sharpenings from each new wheel.
*Darex does not re-plate or recommend re-
plating the grinding wheels. For replacement
wheels, contact your Darex distributor or Darex .
HOW TO CHANGE A WHEEL
1. Unplug unit from power supply
and use a “LOCK OUT” “TAG OUT”
procedure.
2. Using a
3mm hex
key, remove
3; 3mm
socket head
cap screws
(PP12240FF)
from wheel
guard cover.
XT-3000 WHEEL INFORMATION