Leigh Super12, User Manual, Page: 26 / 86

THROUGH DOVETAIL PROCEDURES
20 Chapter 8 S
uper
J
ig
-12-18-24 User Guide
8-1 Through Dovetail Terminology:
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8-2
Let’s look at how to make a simple square box. When you
assemble the finished pieces with the faces properly oriented, then
any one of the pin ends will fit any one of the tail ends. In fact,
the box can be put together in six different ways.
8-3
For this trial you need five identical boards 3 ⁄
4
"x
5- 1 ⁄
2
"[20x140mm] x about 8"[200mm] long. Mark inside faces for
two tailboards and outside faces for three pinboards (one pinboard is
a spare). Use the
e7-Bush , the No. 80-8 1 ⁄
2
"[12,7mm]x 8° dovetail
bit and 140-8 5 ⁄
16
"[7,9mm] straight bit (all included with Superjig).
Note:
13
⁄
16
"[20mm] is maximum through pin board thickness.
8-4
Fit the E-7 guidebush to the router. Align the No. 10 mark
with the base mark  . No guidebush adjustment is required with
through dovetails. If you have a router that is incompatible with
the e-Bush, you can use a standard
7
⁄
16
"[11,1mm] guidebush (min.
depth 1 ⁄
4
" see page 67) for through dovetails.
Then fit the supplied 80-8 dovetail bit to the router.
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
Pins
 Pin sockets

Half-pins
➃
Half-pin sockets
➄ Tails

Tail sockets
The pins fit in the pin sockets. Joints should almost always end
each side with half-pins.
5 /
16
"
3
/
8
"
7 /
16
"
1 /
2
"
1 /
4
"
1/4"
1/2"
3/4"
All through dovetail bits have 8˚ angles. All carbide bit heights are slightly greater than maximum depth of cut listed.
1"
Depth of Cut
140 50-8
Bit No.
60-8 70-8 75-8 80-8
1/8"
3/8"
5/8"
7/8"
Depth of Cut Range
T H R O U G H D O V E T A I L B I T C U T T I N G D E P T H
1 /
2
"
Through Dovetail Bit Selection
5 /
16
"
50-8 140-8 80-8 75-8 70-8 60-8