Leigh D4R Pro, User Manual

Page: 53 / 92

D4R Pro - CHAPTER 12
Rabbeted
Half-Blind Dovetails
45
Before attempting rabbeted half-blind dovetails, first
master the techniques of flush half-blind dovetails in
chapter 10.
➀ Pins
h
➁
Pin sockets
➂
Half-pins
➃ Half-pin sockets
➄
Tails H
➅
Tail Sockets
Bit selection is critical. You need to select
a specific dovetail bit for your rabbeted
half-blind dovetail project, depend-
ing on the rabbet depth you are using.
• Choose one of the five 1 ⁄
2
"[12,7mm]
diameter dovetail bits shown above.
See bit selection in Appendix II.
• Depth of cut must be as specified for
each of the five bits illustrated above.
Exception: See fig.11-26. Note: No’s 101-8,
112-8 and 128-8 are optional Leigh bits.
• Raising the bit above its specified cut-
ting depth will result in loose joints
and may damage the jig, bit and/
or guidebush. A lower setting will
result in tighter joints that may not
fit together.
• Small Depth of Cut adjustments
will change joint fit tightness. See
10-3 to 10-5 for why.
• Rabbeted Half-blind PINS and
TAILS are routed with the same
dovetail bit and must be at the same
Depth of Cut.
• All half-blind dovetail bits work
with the Leigh e7-Bush supplied
with your Leigh jig or a standard
7
⁄
16
"[11,1mm] outside diameter
guidebush.
•
Each dovetail bit will produce
only one depth of cut. Only
1
⁄
2"
[12,7mm]
➂
cutting diameter bits can
be used for half-blind dovetails.
12-1 Rabbeted Half-blind Dovetail Terminology:
The pins fit in the pin sockets. Joints should almost always end
each side with half-pins.
RABBET DEPTH ➀
determines the
maxi-
mum depth of cut ➁
you can use. Select
a bit with a depth of cut that is at least 1/16"
[1,6mm]
less
than the rabbet depth.
Lip thickness 4 will vary depending on overall
board thickness – maximum 3/8” when using
undercut side stops.
Rabbet width 5 is variable and set to suit
project.
12-2 Cutting Depth
for Rabbeted Half-Blind Dovetails
14˚
120-8
7
/
16
"
[11mm]
12˚
112-8
1
/
2
"
[13mm]
10˚
101-8
5
/
8
"
[16mm]
128-8
3
/
8
"
[9mm]
18˚
80-8
3
/
4
"
[19mm]
DEPTH
OF CUT
DEPTH
OF CUT
IMPORTANT:
Add ~
1
/
8
" [3mm] to the depth of cut for pin board thickness
NOTE:
See 10-35 chart on p.38 for range of tail board thickness
~
Symbol for approximately
Pin Board Thickness
Pin Board Thickness
~
~
~
~ ~
NOTE:
Bits 80-8 and 120-8 are included with the jig
~
1
/
8
" [3mm] min.
~
1
/
8
" [3mm] min.
2
1
3
Rabbet Width
Lip
Thickness
4
5
1
6
3
2
4
5
Pin Board
Tail Board
Important! Read This About Rabbeted HB Depth of Cut
The online video will reduce your learning time
dramatically!
Stream to your smart phone or tablet to use in
your shop as a visual reference. Find the video in the Instructional
Videos section of the Support menu at leighjigs.com .
Watch the Online Instructional Video