75
BIT SELECTION
Appendix II
D4R Pro User Guide
1
2
3
B
Pin Board
Tail Board
Bits:
The same dovetail bit routs both
parts of a half-blind dovetail.
Flush Drawers:
The dovetail bit’s working depth
of cut
B
must be less than the
pin board thickness
➀
for flush
4
5
Half-Blind Dovetail
Bit Selection
drawers by at least
1
⁄
8
"[2mm].
Rabbeted Drawers:
The dovetail bit’s working depth of cut
B
must
be about
1
⁄
16
"[1mm] less than the rabbet depth
➁
for rabbeted drawer fronts.
Drawer Sides (Tail Board):
Minimum thickness is
1
⁄
4
"[6mm]. Drawer side thickness
➂
does not affect bit selection.
Note:
B
is the nominal working depth for half-blind dove-
tails, not the maximum depth.
B
must not be varied, except
for minor adjustments for joint fit.
See page 37.
Selecting the Bit
Measure
the drawer front thickness (minimum
1
⁄
2
"[12mm])
➀
or rabbet depth (minimum ~
7
⁄
16
"[11mm])
➁
.
Select
a bit with the appropriate depth of cut
B
from the fol-
lowing pages.
Can I use any dovetail bit?
No, all half-blind bits
must be
1
⁄
2
" [12,7mm] diameter. As the angle changes, so does
the depth of cut. Using bits that are a different angle and diam-
eter will result in joints that don’t fit, and could damage the jig.
Guidebush
All 8mm shank half-blind dovetail bits listed in this appendix
work with the
e7-
Bush (
7
⁄
16
" OD [11,1mm]) supplied with
your Leigh jig, or any
7
⁄
16
" OD [11,1mm] guidebush. No other
guidebush sizes can be used for half-blind dovetails. See page 70.
Shank Selection
The Leigh D4R Pro comes with two half-blind bits with 8mm
shanks, plus a
1
⁄
2
"
[12,7mm] to 8mm collet reducer. The reducer
➃
simply slides into the
1
⁄
2
"
[12,7mm] collet
➄
of your router,
and the 8mm shank bit is inserted into the collet reducer. The
collet is tightened as normal. The collet reducer is not required
with
1
⁄
2
"
[12,7mm] shank bits.
For a
1
⁄
2
"[12,7mm] collet you
will require the included
1
⁄
2
"[12,7mm] to 8mm collet reducer,
No. 172-8.
Note:
➃
is a collet reducer, not a collet
➄
.
The reducer does
not replace the collet, it slides directly into your collet.
Summary of Contents for D4R Pro
Page 14: ...JIG ASSEMBLY MOUNTING AND USING THE CLAMPS 6 Chapter 1 D4R Pro User Guide ...
Page 24: ...WOOD PREPARATION 16 Chapter 6 D4R Pro User Guide ...
Page 86: ...BIT SELECTION 78 Appendix II D4R Pro User Guide ...
Page 90: ...JIG PARTS 82 Appendix III D4R Pro User Guide ...
Page 92: ...PRINTED IN CANADA Joining Tradition with Today Printed in Canada ...
