Leigh Super12 - Bit Selection for Half-Blind Dovetails

BIT SELECTION
72
Appendix ii Super Jig-12-18-24 User Guide
1
2
3
B
Bit Selection for Half-Blind Dovetails
Both parts of a half-blind dovetail are cut with the same
dovetail bit. The dovetail bit’s working depth of cut
B
must be less than the pinboard thickness

for flush
drawers by at least
1
⁄8"[2mm], and slightly less than the
rabbet depth

for rabbeted drawer fronts. Minimum
pin board (drawer front) thickness is
1
⁄2"[12mm].
Drawer side thickness

does not affect bit selection.
Note:
B
is the nominal working depth for half-blind
dovetails, not the maximum depth.
B
must
not be varied, except for minor adjustments for
joint fit. See page 35.
Measure the drawer front thickness (minimum
1
⁄2"[12mm])

or rabbet depth (minimum
7
⁄16"[11,1mm])

and select the bit with the
appropriate depth of cut
B
from one of the five
bits on the following pages.
Guidebush
All joints on the Superjig are routed with the
e7-Bush, or all but box joints with any
7
⁄16" OD
guidebush (min. barrel depth
1
⁄4"). See page 68.
Shank Selection
Note: You will require a router with an 8mm or
1
⁄2"[12,7mm] collet to use our 8mm shank bits.
For a
1
⁄2 "[12,7mm] collet you will require our
1
⁄2"[12,7mm] to 8mm collet reducer No. 172-8.
Note: This is a collet reducer
➃
, not a collet
➄
.
It does not replace the collet, it slides directly
into your
1
⁄2" collet. Do not remove the collet
nut when installing the collet reducer.
4
5
Half-Blind Dovetails