Leigh Super12 - Leigh Through Dovetail Bit Specifications

BIT SELECTION
70
Appendix ii Super Jig-12-18-24 User Guide
You will note that some of the dovetail bits’ depths of cut overlap.
For example:
No. 80-8 bit (B):
1
⁄2"–
13
⁄16"[12 - 20mm]
No. 70-8 bit (B):
1
⁄4"–
1
⁄2"[6 - 12mm]
This means that
1
⁄2" boards can be joined using either the
No. 80-8 and 140-8 combination, the No. 75-8 and 140-8 com-
bination, or the No. 70-8 and 140-8 combination.
The three bit combinations will produce slightly different-looking
joints because each dovetail bit produces a different size pin:
No. 70-8
3
⁄8"

No. 75-8
7
⁄16"

No. 80-8
1
⁄2"

.

Do not attempt to rout dovetails at less than the minimum
depth of cut specified.
2
3
1
Leigh Through Dovetail Bits
Note: Bit and joint drawings are about actual size.
Joint from Bit No. 80
A
B
F
G
Cutter 140-8
C
G
Cutter 80-8 bw dim
C
F
A
B
D
E
A B / G C D E F Guidebush
Bits Overall Diameter Cutting Depth Range Shank Diameters Shank Length Overall Length Angle Diameter
No. 80-8* 1/2" [12,7] B 1/2" to 13/16" [13,0-20,6]** 8mm 1-3/4" [45,0] 2-9/16" [65,0] 8° e7 or 711C 7/16" [11,1]
No. 140-8* 5/16" [7,9] G up to 1" [26,0] 8mm 1-3/4" [45,0] 2-3/4" [70,0] – e7 or 711C 7/16" [11,1]
140-8
80-8
Joint from Bit No. 75-8
A
B
F
G
Cutter 140-8
C
G
Cutter 75-8 bw dim
C
B
D
E
A
F
A B / G C D E F Guidebush
Bits Overall Diameter Cutting Depth Range Shank Diameters Shank Length Overall Length Angle Diameter
No. 75-8 7/16" [11,1] B 3/8" to 5/8" [9,5-16,0] 8mm 1-3/4" [45,0] 2-3/8" [60,0] 8° e7 or 711C 7/16" [11,1]
No. 140-8* 5/16" [7,9] G up to 1" [26,0] 8mm 1-3/4" [45,0] 2-3/4" [70,0] – e7 or 711C 7/16" [11,1]
140-8
75
-
8
Numbers in brackets are millimeters * Bits 80-8, 120-8, and 140-8 come standard with Leigh Super Jigs
**Maximum pin board thickness =
13
⁄16"
Included
with
Superjig
Included
with
Superjig
Included
with
Superjig