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RTJ400 User Guide
Box Joint Procedures - 3/16"
Chapter 12
Symmetrical Board Width Chart for ⁄
"
Box Joints
Total Pins & Sockets 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41
Inches ⁄" ⁄" 1 ⁄" 1 ¾" 2 ⁄" 2 ⁄" 2 ⁄" 3 ⁄" 3 ⁄" 4 ⁄" 4 ⁄" 4 ⁄" 5 ¼" 5 ⁄" 6 ⁄" 6 ⁄" 6 ⁄" 7 ⁄" 7 ⁄" 8"
Millimeters 14 25 34 44 54 64 74 84 94 104 114 124 133 144 153 164 173 183 193 203
Asymmetrical Board Width Chart for ⁄
"
Box Joints
Total Pins & Sockets 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Inches ⁄" 1 ⁄" 1 ⁄" 1 ⁄" 2 ⁄" 2 ⁄" 3 ⁄" 3 ⁄" 3 ⁄" 4 ⁄" 4 ⁄" 5 ⁄" 5 ⁄" 5 ⁄" 6 ¼" 6 ⁄" 7 ⁄" 7 ⁄" 7 ⁄"
Millimeters 20 29 40 49 60 69 79 89 99 109 119 129 139 148 159 168 179 188 198
12-4 Use the Quick Reference strip to determine the correct
straight bit and eBush combination.
IMPORTANT NOTE:
Read
the whole chapter before routing any boards, and see quick fit
instructions in 12-14.
12-7
Install the e10 eBush to the router table/router table insert
set to 5, or if you have already done the quick fit test, use this
setting instead.
12-3 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 8" [203mm] for " joints. For wider boards, see
www.leighjigs.com.
Asymmetrical Joints have a pin at one edge and
a socket at the other. e total number of pins and
sockets will always be an even number.
Symmetrical Joints have a full pin at
each board edge. e total number of pins and
sockets will always be an odd number.
12-5 Making a Box Note the symbols indicating either side
of the pin and socket boards can face in or out. With box joints,
the same edge of the board goes against the sidestop.
12-6 Prepare four similar boards ⅝"× 4 ⅝" by about 8" long
[19mm × 115mm × 200mm]. For the quick fit test you’ll need
two test boards about ¼" thick. Boards of different thicknesses
may also be joined.
IMPORTANT: Read this whole chapter before
routing any boards.
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