Leigh Super12 - Single Pass Cutting Depth Guide; Critical Note: Single Pass Depth of Cut

SINGLE PASS HALF-BLIND DOVETAILS
38
Chapter 10 Super Jig-12-18-24 User Guide
1
6
3
4
Depth
of Cut
Depth
of Cut
7
8
22
5
 IMPORTANT! Bit depths of cut for “single pass” dovetails
are not the same as for variably spaced joints.
10-2 Cutting Depth for Single Pass Half-Blind Dovetails
Note: Add at least
1
⁄8"[3,2mm] to the depth of cut for board thickness.
*
Included with jig. ~ Symbol for "Approximately"
•
Depth of cut must be as specified for each of the five
bits shown above. Exception: See fig.11-26. Note: Leigh
bits 101-8, 112-8 and 128-8 are optional.
•
Raising the bit above its specified cutting 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 allow for joint
fit tightness. See why in Steps 9-3 to 9-5.
•
Choose one of the five,
1
⁄2"[12,7 mm] diameter dovetail
bits shown above.
•
Fit the provided Leigh e7-Bush to the router as shown
below and set at No.10, or use a standard
7
⁄16"[11,1mm]
guidebush (min. barrel depth
1
/4" see page 67).
The pins fit in the pin sockets. Joints almost always
begin and end with a half-pin as shown.
10-1 Single Pass Half-Blind Dovetail
Terminology:

Pins
h

Pin sockets

Half-pins
➃
Half-pin sockets
➄
Tails
H

Tail sockets
➆
Depth of Cut (tails)
➇
Depth of Cut (pins)
Minimum pin board
thickness 11/32"[8,7mm]
Depth of cut:
~7/32" [5,5mm]
128-8
18°
1/8"[3,2mm]
Min
1/2"
[12,7mm]
~7/32"[5,5mm]
120-8
14°
Minimum pin board
thickness 13/32"[10,3mm]
Depth of cut:
~9/32" [7,1mm]
1/8"[3,2mm]
Min
1/2"
[12,7mm]
~9/32"
[7,1mm]
112-8
12°
Minimum pin board
thickness 17/32"[13,5mm]
Depth of cut:
~3/8" [9,5mm]
1/8"[3,2mm]
Min
1/2"
[12,7mm]
~3/8"
[9,5mm]
101-8
10°
Minimum pin board
thickness 9/16"[14,3mm]
Depth of cut:
~7/16" [11,1mm]
1/8"[3,2mm]
Min
~7/16"
[11,1mm]
1/2"
[12,7mm]
80-8
8°
Minimum pin board
thickness 5/8"[15,9mm]
Depth of cut:
~1/2" [12,3mm]
1/8"[3,2mm]
Min
~1/2"
[12,3mm]
1/2"
[12,7mm]
Pinboard
Pinboard
Pinboard
Pinboard
Pinboard
* *