38
B975 User Guide
Chapter 6
Routing Wider Boards
6-4
Board Width Selection
Board widths are determined by the total number of
pins and sockets in the joint design. Use this chart to choose your board width.
Board widths indicated in the chart below will produce full size pins and sockets at each
board edge for symmetrical joints. Symmetrical joint board widths may be reduced as
required, resulting in smaller but equally sized pins and sockets at each board edge.
6-3
Joint layout
Review the drawing below.
Symmetrical
joints have pins
A
on
both edges of the pin board, and sockets
B
on both edges of the socket board.
Note:
Only symmetrical joints can be routed on wider boards.
Asymmetrical joints are not
possible on wide boards.
A
B
B
A
Symmetrical Board Widths for
3⁄4
" Box Joints on Wider Boards*
Total Pins & Sockets
3
5
7
9
11
13
15
17
19
21
23
Inches
2
3/16
"
3
11/16
"
5
3/16
"
6
11/16
"
8
3/16
"
9
11/16
"
11
3/16
"
12
11/16
"
14
3/16
"
15
11/16
"
17
3/16
"
Millimeters
56
94
132
170
208
246
284
322
360
398
437
Symmetrical Board Widths for
1⁄2
" Box Joints on Wider Boards*
Total Pins & Sockets
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
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 " 10 11/16" 1111/16" 12 11/16" 13 3/4" 14 3/4" 15 3/4" 16 13/16" 17 13/16"
Millimeters
37
63
89
115
141
167
193
219
245
271
297
323
349
375
401
427
453
*Note: Wider boards are not possible when using a router table.
Full size
pins and sockets
When a symmetrical board width is reduced,
the joint will have smaller, but equal sized
pins and sockets at each edge of the board.
Width specified in the board width chart
results in full size pins and sockets at each
edge of the board.
When the board width is reduced further,
the result is very narrow and fragile pins at
each edge of the board.
Small pins can break easily
Reduced size pins and sockets
