Jet 709060 User manual

OWNER'S MANUAL
12” Master Dovetail Jig
WMH TOOL GROUP
Consumer/Light Industrial Products Division
P.O. BOX 1349
Auburn, WA 98071-1349
Ph: 1-800-274-6848
▪ Fax: [phone]
E-mail: [e-mail]
www.wmhtoolgroup.com M-709060 07/02

2
This manual has been prepared for the owner and operators of a Dovetail Jig. Its purpose, aside from
machine operation, is to promote safety through the use of accepted correct operating and maintenance
procedures. Completely read the safety and maintenance instructions before operating or servicing the
machine. To obtain maximum life and efficiency from your Jig, and to aid in using the machine safely,
read this manual thoroughly and follow instructions carefully.
Warranty & Service
The WMH Tool Group warrants every product it sells. If one of our tools needs service or repair, one of
our Authorized Repair Stations located throughout the United States can give you quick service.
In most cases, any one of these WMH Tool Group Repair Stations can authorize warranty repair, assist
you in obtaining parts, or perform routine maintenance and major repair on your JET, Performax, Wilton,
or Powermatic tools.
For the name of an Authorized Repair Station in your area, please call 1-800-274-6848, or visit
www.wmhtoolgroup.com
More Information
Remember, the WMH Tool Group is consistently adding new products to the line. For complete, up-to-
date product information, check with your local WMH Tool Group distributor, or visit
www.wmhtoolgroup.com
WMH Tool Group Warranty
The WMH Tool Group (including JET, Performax, Wilton and Powermatic brands) makes every effort to
assure that its products meet high quality and durability standards and warrants to the original retail
consumer/purchaser of our products that each product be free from defects in materials and workmanship
as follow: 1 YEAR LIMITED WARRANTY ON ALL PRODUCTS UNLESS SPECIFIED OTHERWISE.
This Warranty does not apply to defects due directly or indirectly to misuse, abuse, negligence or
accidents, normal wear-and-tear, repair or alterations outside our facilities, or to a lack of maintenance.
THE WMH TOOL GROUP LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD SPECIFIED ABOVE,
FROM THE DATE THE PRODUCT WAS PURCHASED AT RETAIL. EXCEPT AS STATED HEREIN,
ANY IMPLIED WARRANTIES OR MERCHANTIBILITY AND FITNESS ARE EXCLUDED. SOME
STATES DO NOT ALLOW LIMITATIONS ON HOW LONG THE IMPLIED WARRANTY LASTS, SO THE
ABOVE LIMITATION MAY NOT APPLY TO YOU. THE WMH TOOL GROUP 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
PRODUCTS. SOME STATES DO NOT ALLOW THE EXLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO
YOU.
To take advantage of this warranty, the product or part must be returned for examination, postage
prepaid, to an Authorized Repair Station designated by our office. Proof of purchase date and an
explanation of the complaint must accompany the merchandise. If our inspection discloses a defect, we
will either repair or replace the product, or refund the purchase price if we cannot readily and quickly
provide a repair or replacement, if you are willing to accept a refund. We will return repaired product or
replacement at WMH Tool Group’s expense, but if it is determined there is no defect, or that the defect
resulted from causes not within the scope of WMH Tool Group’s warranty, then the user must bear the
cost of storing and returning the product. This warranty gives you specific legal rights; you may also have
other rights which vary from state to state.
The WMH Tool Group sells through distributors only. Members of the WMH Tool Group reserve the right
to effect at any time, without prior notice, those alterations to parts, fittings, and accessory equipment
which they may deem necessary for any reason whatsoever.

3
 WARNING
1. Read and understand the entire owner’s manual before attempting assembly or operation.
2. This Dovetail Jig is designed and intended for use by properly trained and experienced
personnel only. If you are not familiar with the proper and safe operation of a Dovetail Jig, do
not use until proper training and knowledge have been obtained.
3. KEEP GUARDS IN PLACE and in working order.
4. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to see that keys and
adjusting wrenches are removed from tool before turning it on.
5. KEEP WORK AREA CLEAN. Cluttered areas and benches invite accidents.
6. DON’T USE IN DANGEROUS ENVIRONMENT. Don’t use power tools in damp or wet locations, or
expose them to rain. Keep work area well lighted.
7. KEEP CHILDREN AWAY. All visitors should be kept safe distance from work area.
8. MAKE WORKSHOP KID PROOF with padlocks, master switches, or by removing starter keys.
9. DON’T FORCE TOOL. It will do the job better and safer at the rate for which it was designed.
10. USE RIGHT TOOL. Don’t force tool or attachment to do a job for which it was not designed.
11. WEAR PROPER APPAREL. Do not wear loose clothing, gloves, neckties, rings, bracelets, or other
jewelry which may get caught in moving parts. Nonslip footwear is recommended. Wear protective
hair covering to contain long hair.
12. ALWAYS USE SAFETY GLASSES. Also use face or dust mask if cutting operation is dusty.
Everyday eyeglasses only have impact resistant lenses, they are NOT safety glasses.
13. 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.
14. DON’T OVERREACH. Keep proper footing and balance at all times.
15. MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for best and safest performance. Follow
instructions for lubricating and changing accessories.
16. DISCONNECT TOOLS before servicing; when changing accessories, such as blades, bits, cutters,
and the like.
17. REDUCE THE RISK OF UNINTENTIONAL STARTING. Make sure switch is in off position before
plugging in.
18. USE RECOMMENDED ACCESSORIES. Consult the owner’s manual for recommended accessories.
The use of improper accessories may cause risk of injury to persons.
19. NEVER STAND ON TOOL. Serious injury could occur if the tool is tipped or if the cutting tool is
unintentionally contacted.
20. 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 affect its operation. A guard or other part that is damaged should be
properly repaired or replaced.
21. DIRECTION OF FEED. Feed work into a blade or cutter against the direction of rotation of the blade
or cutter only.
22. NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF. Don’t leave tool until it
comes to a complete stop.
23. Some dust created by power sanding, sawing, grinding, drilling and other construction activities
contains chemicals known to cause cancer, birth defects or other reproductive harm. Some
examples of these chemicals are:
• Lead from lead based paint
• crystalline silica from bricks and cement and other masonry products, and
• arsenic and chromium from chemically-treated lumber.
24. Your risk from those 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 approved safety
equipment, such as those dust masks that are specifically designed to filter out microscopic particles
25. Do not operate tool while under the influence of drugs, alcohol or any medication.

4
12” Master Dovetail Jig 709060
Width Capacity .....................................................................................................................................12”
Thickness Capacity.................................................................................................................1/2" – 1-1/4”
Jig Dimensions........................................................................................................11”W x 17”L x 6-3/4“H
Gross Weight...................................................................................................................................23 lbs.
Available Accessories
709061 ................................................................................................ 5/16” Aluminum Dovetail Template
709062 ................................................................................................ 7/16” Aluminum Dovetail Template
709063 .................................................................................................. 1/2” Aluminum Dovetail Template
709064 ................................................................................................ 9/16” Aluminum Dovetail Template
709239 .......................................................................6 Piece General Purpose Router Bit Set 1/4" Shank
709240 .......................................................................6 Piece General Purpose Router Bit Set 1/2" Shank
709241 .....................................................................10 Piece General Purpose Router Bit Set 1/4" Shank
709242 .....................................................................10 Piece General Purpose Router Bit Set 1/2" Shank
709243 .....................................................................15 Piece General Purpose Router Bit Set 1/4" Shank
709244 .....................................................................15 Piece General Purpose Router Bit Set 1/2" Shank
Assembly and Mounting
1. Thread the rear handle (A, Fig. 1) into the
clamping rod (B, Fig. 1). The rear handle
should be mounted with the cams (C, Fig. 1)
pointing up, as shown in the photo. This
way you will push the handle away from you
to lock the workpiece in the jig.
2. Thread the front handle (D, Fig. 1) into the
clamping rod (E, Fig. 1). The front handle
should be mounted with the cams (F, Fig. 1)
pointing out, as shown in the photo. This
way you will push the handle down from you
to lock the workpiece in the jig.
3. You can mount the jig to a workbench
through the two mounting holes found at the
rear of the jig. You can also mount the jig to
a piece of plywood so that it can be clamped
to your workbench when needed.

5
Operation and Setup
The 12” Master Dovetail Jig comes with a 1/2"
template. It should be used with a 1/2" dovetail
router bit (1/4" shank, 14°), and a 7/16” guide
bushing.
Always set up and practice on a test piece.
1. Lay out the workpieces and mark according
to the finished position, see Figure 2.
2. Slide the workpiece marked “front,” or “back”
(A, Fig. 3) under the top clamping assembly
when handle is in the up position. The side
marked inside should face up.
3. Adjust the clamping pressure knobs (C, Fig.
3) so that the bar is just over the workpiece.
The workpiece should still move freely. Hold
the workpiece in place by pushing the
handle away from you. You should not need
to use excessive force to clamp the
workpiece.
4. Set the horizontal stop (D, Fig. 3) so that the
edge of workpiece lines up in the center of
one of the template fingers, see Figure 3.
5. Take off the template (F, Fig. 3) by removing
the four screws (E, Fig. 3) that hold the
template in position.
6. Remove the front clamping assembly by
unscrewing two knobs (G, Fig. 3).
7. Mark workpiece 1/2" from the edge (H, Fig.
4) (template finger width). Adjust the vertical
stop against the (I, Fig. 4) square.
8. Reinstall the template and front clamping
assembly.
9. Slide the workpiece marked “side” under the
front clamping assembly when handle is in
the release position. The side marked
“inside” should face out. Match up the
numbers you marked.
10. Adjust the clamping pressure knobs so that
the bar is just over the workpiece. The
workpiece should still move freely. Clamp
the workpiece in place by pushing the
handle down. You should not need to use
excessive force to clamp the workpiece.

6
11. Set the template back from the front edge of
the workpiece by approximately 1/8”, see
Figure 5.
12. Loosen the two knobs (A, Fig. 5) to position
the template. Measure from the two ends of
the workpiece to the template to make sure
the template is parallel to the front edge of
the workpiece.
13. The fence (B, Fig. 5) should be set from the
template finger tip according to a simple
equation found in Table 1. Loosen the two
knobs (C, Fig. 5) to position the fence.
14. Set the router bit so that it is approximately
7/8” lower than the router base.
15. Rout off the front edge of the workpiece
following along the template fingers. Then
rout out the rest of the material.
16. Remove the workpieces and check for fit.
Fitting and Adjusting
If the dovetail fit is too tight decrease the router
bit distance from router base slightly.
If the dovetail fit is too loose increase the router
bit distance from the router base slightly.
If the pins on the side piece fit too deeply in the
tails of the front, or back piece the cut is too
deep. Move the fence forward the same amount
the pins are exposed.
If the side piece sticks out from the front, or back
piece the cut is too shallow. Move the fence
back the same amount the sides stick out.
If the edges on the front and side piece do not
match adjust the stop. The front stop must be
offset from the top stop the width of the template
finger, in this case 1/2".
When you have the jig properly adjusted, you
can dovetail the actual drawer parts.
Note: Joints for the left front corner and the
right rear corner of a drawer or a box are cut on
the left side of the jig. Joints for the right front
corner and the left rear corner of a drawer or a
box are cut on the right side of the jig.
Note: The drawer sides should be cut to the
finished height. They can be left longer and cut
to the finished length later.
Note: Once the desired router bit height is
established make a simple gauge block out of a
hardwood to quickly get the correct setting in the
future.
Note: Once the stops are set properly and you
have obtained the desired results use a scribe to
mark the stop locations.
Equation: Stock Thickness times two, plus
Router Base Radius, Minus Bit Radius, equals
distance from template finger to fence.
Example
Stock
Thickness
Router
Base
Radius
Router
Bit
Radius
Distance
from
Fence to
Template
Finger
1/2" times
2 = 1” 6” divided by 2 = 3”
1/2"
divided by
2 = 1/4" 3-3/4”
Table 1

7
Breakdown for the 12” Dovetail Jig

8
Parts List for the 12” Dovetail Jig
Index Part
No. No. Description Size Qty.
1..........91801........................... Base...................................................... ...............................................1
2..........91802........................... Threaded Bushing ................................. ...............................................4
3..........91803........................... Bracket.................................................. ...............................................2
4..........91804........................... Knob Short ............................................ ...............................................2
5..........91805........................... Knob...................................................... ...............................................2
6..........91806........................... Handle................................................... ...............................................2
7..........91807........................... Knob...................................................... ...............................................4
8..........91808........................... Eccentric Wheel..................................... ...............................................4
9..........91809........................... Knob (long)............................................ ...............................................2
10........91810........................... Fence.................................................... ...............................................1
11........91811........................... Bracket.................................................. ...............................................2
12........709063......................... 1/2" Aluminum Template........................ ...............................................1
13........91813........................... Stops (long)........................................... ...............................................2
14........91814........................... Support.................................................. ...............................................4
15........TS-0680042................. Flat Washer........................................... ...............................................4
16........91816........................... Spring.................................................... ...............................................4
17........91817........................... Rod ....................................................... ...............................................2
18........91818R........................ Threaded Bracket (right)........................ ...............................................2
19........91818L......................... Threaded Bracket (left).......................... ...............................................2
20........TS-081C022................. Pan Phillips Machine Screw...................10-24 x 3/8”.............................4
21........TS-081C041................. Flat Phillips Machine Screw...................10-24 x 5/8”.............................8
22........TS-081F021................. Flat Phillips Machine Screw...................1/4"-20 x 3/8”...........................4
23........91813A ........................ Stops (short).......................................... ...............................................2