Leigh D4R Pro - Page 80

BIT SELECTION
72
Appendix II D4R Pro User Guide
A B / G C D E F Guidebush
BITS Overall Diameter Cutting Depth Range Shank Diameters Shank Length Overall Length Angle Diameter
No. 100 13/16" [20,6] B 1" to 1-1/4"* [26,0-32,0*] 1/2" [12,7] 1-3/4" [45,0] 3" [76,0] 8° 716C or 5/8" [15,9]
No. 150 7/16" [11,1] G 1/8" to 1-1/4" * [3,0-32,0*] 1/2" [12,7] 1-3/4" [45,0] 3" [76,0] – 716C or 5/8" [15,9]
A B / G C D E F Guidebush
Bits Overall Diameter Cutting Depth Range Shank Diameters Shank Length Overall Length Angle Diameter
No. 90 11/16" [17,5] B 5/8" to 1" [16,0-26,0] 1/2" [12,7] 1-3/4" [45,0] 2-3/4" [70,0] 8° 716C or 5/8"[15,9]
No. 160 1/2" [12,7] G 1/8" to 1-1/4"* [3,0-32,0*] 1/2" [12,7] 1-3/4" [45,0] 3" [76,0] – 716C or 5/8"[15,9]
Note: Bit and joint drawings are about actual size.
C
A
G
D
E
Note that some of the dovetail bits’ depths of cut overlap. For example:
No. 70-8 bit
B
:
1
⁄4"–
1
⁄2" [6 - 13mm]
No. 75-8 bit
B
:
3
⁄8"–
5
⁄8" [9,5 - 16mm]
No.80-8 bit
B
:
1
⁄2"–
13
⁄16" [12 - 20mm]
This means all three bits are capable of routing boards
1
⁄2" [12,7mm] thick using
one of the following combinations: No. 80-8 and 140-8, No.75-8 and 140-8,
or No. 70-8 and 140-8.
The three bit combinations will produce slightly different-looking joints
because each dovetail bit produces a different size diameter of pin:
No.70-8
➀
:
3
⁄8"
No.75-8
➁
:
7
⁄16"
No.80-8
➂
:
1
⁄2"

Do not attempt to rout dovetails at less than the minimum depth of
cut specified, as the bit can hit the guide fingers or guide bushing.
2
3
1
Leigh Through Dovetail Bits
F
A
B
G






100
150
Numbers in brackets are millimeters *An extra step is required to rout joints with a cutting depth greater than 1"[26,0]
F
A
B
G






A
G
D
E
C
90
160