DUAL DOWEL JOINTER
120V/60hZ
Model 97427
SET Up AND OpERATINg INSTRUcTIONS
Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product described herein.
®
Distributed exclusively by harbor Freight Tools .
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE ThIS MANUAL.
©
®
Copyright 2008 by Harbor Freight Tools . All rights reserved. No portion of this
manual or any artwork contained herein may be reproduced in any shape or form
without the express written consent of Harbor Freight Tools.
For technical questions or replacement parts, please call 1-800-444-3353.
outlets will reduce risk of electric
shock.
before plugging in. Carrying power
tools with your finger on the switch
or plugging in power tools that have
the switch on invites accidents.
b. Avoid body contact with grounded
surfaces such as pipes, radiators,
ranges and refrigerators. There is
an increased risk of electric shock if
your body is grounded.
d. Remove any adjusting key or wrench
before turning the power tool on. A
wrench or a key left attached to a
rotating part of the power tool may
result in personal injury.
c. Do not expose power tools to rain
or wet conditions. Water entering a
power tool will increase the risk of
electric shock.
e. Do not overreach. Keep proper
footing and balance at all times.
This enables better control of the
power tool in unexpected situations.
d. 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.
f. Dress properly. 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.
e. 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.
g. If devices are provided for the
connection of dust extraction and
collection facilities, ensure these are
connected and properly used. Use
of these devices can reduce dust-
related hazards.
3. personal safety
a. Stay alert, watch what you are
doing and use common sense
when operating a power tool. Do
not use a power tool while you are
tired or under the influence of drugs,
alcohol or medication. A moment
of inattention while operating power
tools may result in serious personal
injury.
4. power tool use and care
a. Do not force the power tool. Use
the correct power tool for your
application. The correct power tool
will do the job better and safer at the
rate for which it was designed.
b. Do not use the power tool if the
switch does not turn it on and
off. Any power tool that cannot
be controlled with the switch is
dangerous and must be repaired.
b. Use safety equipment. Always wear
eye protection. Safety equipment
such as dust mask, non-skid
safety shoes, hard hat, or hearing
protection used for appropriate
conditions will reduce personal
injuries.
c. 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
c. Avoid accidental starting. Ensure
the switch is in the off-position
preventive safety measures reduce
SKU 97427
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Page 3
the risk of starting the power tool
accidentally.
vibration may cause temporary or
permanent physical injury, particularly
to the hands, arms and shoulders. To
reduce the risk of vibration-related
injury:
d. Store idle power tools out of the
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.
1. Anyone using vibrating tools regularly
or for an extended period should
first be examined by a doctor and
then have regular medical check-
ups to ensure medical problems are
not being caused or worsened from
use. Pregnant women or people
who have impaired blood circulation
to the hand, past hand injuries,
e. Maintain power tools. Check for
misalignment or binding of moving
parts, breakage of parts and any
other condition that may affect the
power tool’s operation. If damaged,
have the power tool repaired before
use. Many accidents are caused by
poorly maintained power tools.
nervous system disorders, diabetes,
or Raynaud’s Disease should not
use this tool. If you feel any medical
or physical symptoms related to
vibration (such as tingling, numbness,
and white or blue fingers), seek
f. Keep cutting tools sharp and clean.
Properly maintained cutting tools
with sharp cutting edges are less
likely to bind and are easier to
control.
medical advice as soon as possible.
2. Do not smoke during use. Nicotine
reduces the blood supply to the
hands and fingers, increasing the risk
of vibration-related injury.
g. Use the power tool, accessories and
tool bits etc., in accordance with
these instructions and in the manner
intended for the particular type of
power tool, taking into account the
working conditions and the work to
be performed. Use of the power tool
for operations different from those
intended could result in a hazardous
situation.
3. Wear suitable gloves to reduce the
vibration effects on the user.
4. Use tools with the lowest vibration
when there is a choice between
different processes.
5. Include vibration-free periods each
day of work.
5. Service
a. Have your power tool serviced by
a qualified repair person using only
identical replacement parts. This will
ensure that the safety of the power
tool is maintained.
6. Grip tool as lightly as possible (while
still keeping safe control of it). Let
the tool do the work.
7. To reduce vibration, maintain the tool
as explained in this manual. If any
abnormal vibration occurs, stop use
immediately.
Vibration hazard
This tool vibrates during use.
Repeated or long-term exposure to
SKU 97427
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Page 4
12. Use clamps (not included) or other
practical ways to secure and support
the workpiece to a stable platform.
Holding the work by hand or against
your body is unstable and may lead
to loss of control.
Specific Safety Rules
1. Maintain labels and nameplates on
the tool. These carry important safety
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
13. This product is not a toy. Keep it out
of reach of children.
2. Always examine the workpiece for
foreign objects. Never attempt to cut
into nails or other metal objects.
14. People with pacemakers should
consult their physician(s) before
use. Electromagnetic fields in close
proximity to heart pacemaker could
cause pacemaker interference or
pacemaker failure. In addition,
people with pacemakers should:
• Avoid operating alone.
3. Always keep your hands and fingers
well away from the chip ejection area
while the tool is running.
4. Avoid unintentional starting. Prepare
to begin work before turning on the
tool.
• Do not use with power switch locked
on.
• Properly maintain and inspect to
avoid electrical shock.
• Any power cord must be properly
grounded. Ground Fault Circuit
Interrupter (GFCI) should also be
implemented – it prevents sustained
electrical shock.
5. Begin cutting only when the Bits have
reached full speed.
6. Keep the Cutter Head and Drive
Guards in place and in proper
working order.
7. Do not make jointing or planing cuts
deeper than 1/8 inch.
15. Some dust created by power
sanding, sawing, grinding, drilling,
and other construction activities,
contains chemicals known [to the
State of California] to cause cancer,
birth defects or other reproductive
harm. Some examples of these
chemicals are:
8. Use hold-down/push blocks for
jointing material narrower than 3
inches, or planing material thinner
than 3 inches.
9. Do not perform jointing or planing
cuts on pieces shorter than 8 inches
in length.
• Lead from lead-based paints
• Crystalline silica from bricks and
cement or other masonry products
• Arsenic and chromium from
10. Do not lay the tool down until it has
come to a complete stop. Moving
parts can grab the surface and pull
the tool out of your control.
chemically treated lumber
Your risk from these exposures
varies, depending on how often you
do this type of work. To reduce your
exposure to these chemicals: work in
a well ventilated area, and work with
11. Do not leave the tool unattended
when it is plugged into an electrical
outlet. Turn off the tool, and unplug
it from its electrical outlet before
leaving.
SKU 97427
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Page 5
approved safety equipment, such as
those dust masks that are specially
designed to filter out microscopic
particles. (California Health & Safety
Code § 25249.5, et seq.)
grounded Tools: Tools with Three
prong plugs
16. The warnings, precautions,
and instructions discussed in
this instruction manual cannot
cover all possible conditions and
situations that may occur. It must
be understood by the operator that
common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
3-prong plug and Outlet
1. Tools marked with “Grounding
Required” have a three wire cord
and three prong grounding plug.
The plug must be connected to a
properly grounded outlet. If the tool
should electrically malfunction or
break down, grounding provides a
low resistance path to carry electricity
away from the user, reducing the risk
of electric shock. (See 3-prong plug
and Outlet.)
SAVE ThESE
INSTRUcTIONS.
gROUNDINg
TO pREVENT
ELEcTRIc ShOck
WARNINg
2. The grounding prong in the plug is
connected through the green wire
inside the cord to the grounding
system in the tool. The green wire
in the cord must be the only wire
connected to the tool’s grounding
system and must never be attached
to an electrically “live” terminal. (See
3-prong plug and Outlet.)
AND DEATh FROM
INcORREcT gROUNDINg
WIRE cONNEcTION:
Check with a qualified
electrician if you are in doubt
as to whether the outlet is
properly grounded. Do not
modify the power cord plug
provided with the tool. Never
remove the grounding prong
from the plug. Do not use the
tool if the power cord or plug
is damaged. If damaged, have
it repaired by a service facility
before use. If the plug will not
fit the outlet, have a proper
outlet installed by a qualified
electrician.
3. The tool must be plugged into an
appropriate outlet, properly installed
and grounded in accordance with all
codes and ordinances. The plug and
outlet should look like those in the
preceding illustration. (See 3-prong
plug and Outlet.)
SKU 97427
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Page 6
example, a 14 gauge cord can carry
a higher current than a 16 gauge
cord. (See Table A.)
Double Insulated Tools: Tools
with Two prong plugs
3. When using more than one extension
cord to make up the total length,
make sure each cord contains at
least the minimum wire size required.
(See Table A.)
4. If you are using one extension cord
for more than one tool, add the
nameplate amperes and use the sum
to determine the required minimum
cord size. (See Table A.)
Outlets for 2-prong plug
1. Tools marked “Double Insulated”
do not require grounding. They
have a special double insulation
system which satisfies OSHA
requirements and complies with the
applicable standards of Underwriters
Laboratories, Inc., the Canadian
Standard Association, and the
National Electrical Code. (See
Outlets for 2-prong plug.)
5. If you are using an extension cord
outdoors, make sure it is marked with
the suffix “W-A” (“W” in Canada) to
indicate it is acceptable for outdoor
use.
6. Make sure the extension cord is
properly wired and in good electrical
condition. Always replace a damaged
extension cord or have it repaired by
a qualified electrician before using it.
2. Double insulated tools may be used
in either of the 120 volt outlets shown
in the preceding illustration. (See
Outlets for 2-prong plug.)
7. Protect the extension cords from
sharp objects, excessive heat, and
damp or wet areas.
Extension cords
1. Grounded tools require a three wire
extension cord. Double insulated
tools can use either a two or three
wire extension cord.
2. As the distance from the supply
outlet increases, you must use a
heavier gauge extension cord. Using
extension cords with inadequately
sized wire causes a serious drop in
voltage, resulting in loss of power and
possible tool damage.
(See Table A.) The smaller the
gauge number of the wire, the
greater the capacity of the cord. For
SKU 97427
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Page 7
Note: For additional information regarding
the parts listed in the following pages,
refer to the Assembly Diagram near
the end of this manual.
SpEcIFIcATIONS
120 V~ / 60 Hz
3.55 No Load Amps / 710 Watts
Power Plug Type: 2-Prong, Polarized
Power Switch Type: Lockable for
continuous run
Electrical
Requirements
Motor RPM
16,500
Drill Bit Diameter 1/4” (Qty 2)
Assembly
Maximum Drilling
1-7/16”
Depth
Width Between
Drilling Holes
To Install The Drill Bits:
1-5/16” (On Center)
Fence
Adjustments
1. Rotate the two Chucks (18) so that
their Hex Screws (19) are on top.
(See Figure A.)
22-1/2° / 45° / 67-1/2° / 90°
UNpAckINg
2. Use the provided Hex Key (86) to
loosen the two Hex Screws (19).
(See Figure A.)
When unpacking, check to make sure
that the item is intact and undamaged. If
any parts are missing or broken, please
call Harbor Freight Tools at the number
shown on the cover of this manual as soon
as possible.
3. Insert the shafts of the two Bits (17)
(with flat face of shank facing the
screw) fully into the two Chucks (18).
4. Secure the Bits (17) into the Chucks
(18) by using the Hex Key (86) to
firmly tighten the Hex Screws (19).
(See Figure A.)
INITIAL SET Up
INSTRUcTIONS
Read the ENTIRE IMpORTANT
SAFETY INFORMATION section
at the beginning of this manual
including all text under
subheadings therein before set
up or use of this product.
hEX ScREW
(19)
hEX ScREW
(19)
TO pREVENT
SERIOUS INJURY
WARNINg
chUck (18)
chUck (18)
FROM AccIDENTAL
OpERATION:
Turn the power Switch of the
tool to its “OFF” position and
unplug the tool from its
electrical outlet before
assembling or making any
adjustments to the tool.
FIgURE A
(TOp VIEW)
To Adjust The cutting Depth:
1. Move the Motor Base (16) as far back
as it will go. (See Figure B.)
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Page 8
2. Loosen the Screw (47), and set the
cutting depth by sliding the Depth
Tab (48) along the Depth Ruler (49).
(See Figure B.)
3. Retighten the Clamping Lever (12).
(See Figure D.)
4. NOTE: The height must correspond
to half the thickness of the workpiece.
Also, the groove of the Guide Plate
(8) must always be in the middle of
the workpiece.
3. Retighten the Knob Screw (47) to
lock the adjustment in place. (See
Figure B.)
knob
ScREW
(47)
FIgURE D
FIgURE B
hEIghT
ADJUSTMENT
(14)
DEpTh
TAB
(48)
DEpTh RULER
(49)
MOTOR BASE (16)
cLAMpINg
LEVER
(12)
To Adjust The cutting Angle:
gUIDE
pLATE
(8)
1. Loosen the Knob (59).
(See Figure c.)
2. Move the Angle Stop (3) to the
desired angle. (See Figure c.)
3. Retighten the Knob (59).
(See Figure c.)
FIgURE c
kNOB
(59)
OpERATINg INSTRUcTIONS
Read the ENTIRE IMpORTANT
SAFETY INFORMATION section
at the beginning of this manual
including all text under
subheadings therein before set
up or use of this product.
ANgLE
STOp
(3)
The power Switch:
1. To turn on the Dowel Jointer, move
the Power Switch (74) forward.
(See Figure E, next page.)
To Adjust The height:
1. Loosen the Clamping Lever (12).
(See Figure D.)
2. NOTE: The Power Switch (74) is
lockable for continuous running. To
lock the Power Switch in its “ON”
position, move the Switch all the way
forward until it locks in place.
2. Move the Height Adjustment Lever
(14) to the desired height, using the
Scale on the Guide Plate (8).
(See Figure D.)
(See Figure E, next page.)
SKU 97427
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Page 9
3. To turn off the Dowel Jointer, move
the Power Switch (74) all the way
backward. (See Figure E.)
5. Push the Motor Base (16) carefully
forward as far as possible.
6. When finished cutting, move the
Motor Base (16) backward, and turn
the Dowel Jointer off.
FIgURE E
To Join The Workpieces:
1. When the holes in the workpieces
have been made, the workpieces can
be joined together.
2. Place wood glue in both grooves of
the workpieces.
pOWER
SWITch
(74)
3. Place a dowel pin in the hole of one
workpiece.
4. Insert the other workpiece onto the
dowel pin.
To Mark The Workpiece:
1. Before starting with the Dowel Jointer,
the workpieces must be marked as
follows:
5. Clamp the workpieces together.
Then wait until the glue is dry. (Read
glue manufacturer’s instruction.)
a. Place the two workpieces on top of
each other.
b. Secure the workpieces, using a vise
or clamps (neither included).
MAINTENANcE & SERVIcINg
c. Mark the center of the grooves.
TO pREVENT
SERIOUS INJURY
WARNINg
FROM AccIDENTAL
OpERATION:
To position the Dowel Jointer for Large
Workpieces:
Turn the power Switch of the
tool to its “OFF” position and
unplug the tool from its
electrical outlet before
performing any inspection,
maintenance, or cleaning
procedures.
1. Place the Dowel Jointer near the
workpieces.
2. The middle of the Motor Base (16),
which is marked on the Guide Plate
(8), must face the center of the
groove in the workpiece.
3. Move the Motor Base (16) backward.
4. Hold the Dowel Jointer with both
hands, and turn the tool on.
SKU 97427
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Page 10
TO pREVENT SERIOUS
INJURY FROM TOOL
FAILURE:
Do not use damaged
equipment. If abnormal noise
or vibration occurs, have the
problem corrected before
further use.
2. BEFORE EAch USE, check to make
sure the Bits (17) are firmly secured
in place, sharp, and free of cracks or
bends.
3. AFTER USE, clean external surfaces
of the tool with a clean, moist cloth
and mild detergent. Do not use
solvents.
Inspection, Maintenance, and
4. WhEN STORINg, keep the tool and
its accessories in its Carrying Case.
Make sure to store the Carrying
Case in a clean, dry, safe location
out of reach of children and other
unauthorized people.
cleaning
1. BEFORE EAch USE, inspect the
general condition of the tool. Check
for loose screws, misalignment or
binding of moving parts, cracked or
broken parts, damaged electrical
wiring, and any other condition that
may affect its safe operation.
5.
WARNINg! If the supply cord of
this power tool is damaged, it must
be replaced only by a qualified
service technician.
TROUBLEShOOTINg
problem
possible causes
possible Solutions
Tool will not start
1. No power at outlet.
1. Check power at outlet.
2. Cord not connected.
2. Check that cord is plugged in.
Tool produces
unsatisfactory
cuts.
1. Bits not firmly secured.
1. Make sure Bits are firmly secured in the
Chucks.
2. Bits are dull.
2. Use only sharp Bits.
3. Bits are cracked or bent.
3. Replace with new Bits.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect power supply before service.
pLEASE READ ThE FOLLOWINg cAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM IN THIS MANUAL
AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR
WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT,
OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/
OR DISTRIBUTOR ExPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY
CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY
ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING
OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
SKU 97427
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Page 11
pARTS LIST
46 Wood-ruff key 3×10
47 Knob Screw
48 Depth Tab
49 Depth ruler
50 square nut M5
51 spring cap
52 spring for fixing pin
53 pin
54 Slide bush
55 finger
56 cross panhead screw M3x6
57 steel ball Ø5
58 Spring
59 short knob
60 bend tube
61 cross panhead screw M4x52
62 rotor
63 rubber bearing cover
64 cross panhead screw M4x52
65 stator
66 slide switch knob
67 housing
68 switch bar
2
1
1
1
1
2
2
2
2
1
1
1
1
1
1
2
1
1
2
1
1
1
1
4
No Specifications
Qty
2
1
1
1
9
3
1
1
1
1
1
1
1
1
2
1
2
2
2
4
1
2
1
1
2
5
4
1
2
3
4
5
6
7
8
9
cross sunk-head screw M4×6
front plate
angle stop
orientation block
washer 4
cross panhead screw M4×8
hexagon bolt M5×25
guide plate
fixing spring
10 lock clamp
11 hex nut
12 Clamping Lever
13 Check ring
14 Height adjustable level
15 cross sunk-head screw M4×12
16 motor base
17 bit
18 Chuck
19 inner hexagon set screw M4×5
20 cross panhead screw M4×10
21 Front cap
22 oil bearing
23 shaft
24 middle gear
25 checking ring 12
26 big flat washer 5
27 cross panhead self-tapping screw
69 cross panhead self-tapping screw
ST4x12
70 switch holder
1
1
1
1
1
1
2
2
4
2
71 cable clamp
72 switch clamp
73 spring
74 power switch
75 capacitor 0.22uF
76 brush holder
77 carbon brush
78 rivet 3x10
ST4.2×16
28 reduction box
1
1
1
1
1
1
29 wind baffle
30 handle
31 flat washer 6
32 spring washer 6
33 inner hexagon column-head screw
79 cross panhead self-tapping screw
ST4x14
M6x20
80 clamp for choke
1
2
1
1
1
1
1
34 bearing 80101
1
1
2
2
1
3
2
2
2
1
4
2
81 cross panhead self-tapping ST3x10
82 back cover
83 flat washer 4
84 cable jacket
85 cable plug
35 29 bearing cover
36 cross sunk-head screw M4x8
37 cross panhead screw M4x16
38 blocker
39 bearing 80017
40 Check Ring 9
41 gear
42 bearing 80019
43 bearing cover for bearing cover
44 cross sunk-head screw M4x8
45 circlip
86 hex key
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Page 12
ASSEMBLY DIAgRAM
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Page 13
LIMITED 1 YEAR / 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet high
quality and durability standards, and warrants to the original purchaser that for a period
of ninety days from date of purchase that the engine/motor, the belts (if so equipped),
and the blades (if so equipped) are free of defects in materials and workmanship. Harbor
Freight Tools also warrants to the original purchaser, for a period of one year from date
of purchase, that all other parts and components of the product are free from defects in
materials and workmanship (90 days if used by a professional contractor or if used as rental
equipment). This warranty does not apply to damage due directly or indirectly, to misuse,
abuse, negligence or accidents, repairs or alterations outside our facilities, normal wear and
tear, or to lack of maintenance. We shall in no event be liable for death, injuries to persons
or property, or for incidental, contingent, special or consequential damages arising from
the use of our product. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation of exclusion may not apply to you. THIS
WARRANTY IS ExPRESSLY IN LIEU OF ALL OTHER WARRANTIES, ExPRESS OR
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with
transportation charges prepaid. Proof of purchase date and an explanation of the complaint
must accompany the merchandise. If our inspection verifies the defect, we will either
repair or replace the product at our election or we may elect to refund the purchase price
if we cannot readily and quickly provide you with a replacement. We will return repaired
products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning
the product.
This warranty gives you specific legal rights and you may also have other rights which
vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
Record product’s Serial Number here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not
available individually as replacement parts.
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Page 14
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