B975 User Guide
Chapter 7
Router Table Operation
52
7-14
Joint layout
Symmetrical joints have pins
A
on both edges of the pin board, and
sockets
B
on both edges of the socket board. Asymmetrical joints have a socket
C
on one
edge and a pin
D
on the other edge of each board.
7-15
Board Width Selection
Board widths are determined by the total number of pins
and sockets in the joint design and whether the joint is symmetrical or asymmetrical. Use this
chart to determine board widths up to 9-11/16"[246 mm].
Symmetrical Board Widths for
3⁄4
" Box Joints
Total Pins & Sockets
3
5
7
9
11
13
Inches
2
3/16
"
3
11/16
"
5
3/16
"
6
11/16
"
8
3/16
"
9
11/16
"
Millimeters
56
94
132
170
208
246
Asymmetrical Board Widths for
1⁄2
" Box Joints
Total Pins & Sockets
4
6
8
10
12
14
16
18
Inches
1 15/16"
3"
4"
5 1/16"
6 1/16"
7 1/16"
8 1/8"
9 1/8"
Millimeters
50
76
102
128
154
180
206
232
Asymmetrical Board Widths for
3⁄4
" Box Joints
Total Pins & Sockets
4
6
8
10
12
Inches
2 15/16"
4 7/16"
5
15/16
"
7
7/16
"
8
15/16
"
Millimeters
75
113
151
189
227
Symmetrical Board Widths for
1⁄2
" Box Joints
Total Pins & Sockets
3
5
7
9
11
13
15
17
19
Inches
1 7/16"
2 1/2"
3 1/2"
4 1/2"
5 9/16"
6 9/16"
7 5/8"
8 5/8"
9 5/8 "
Millimeters
37
63
89
115
141
167
195
219
245
B
B
D
D
C
C
A
A
Asymmetrical
Symmetrical
Socket Board
Pin Board
Socket Board
Pin Board