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RTJ400 User Guide
Chapter 13
Box Joint Procedures - 3/32"
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 ¼" 1 ⁄" 1 ⁄" 1 ⁄" 2 ⁄" 2 ¼" 2 ⁄" 2 ⁄" 2 ⁄" 3 ⁄" 3 ⁄" 3 ⁄" 3 ⁄" 3 ⁄" 4
Millimeters 7 12 17 22 27 32 37 42 47 52 57 62 67 71 77 82 87 91 97 102
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 ⁄" 1 ¾" 1 ⁄" 2 ⁄" 2 ⁄" 2 ⁄" 2 ⁄" 2 ⁄" 3 ⁄" 3 ⁄" 3 ½" 3 ⁄" 3 ⁄"
Millimeters 10 60 20 25 29 34 40 44 49 54 60 64 69 74 79 84 89 94 99
13-4 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 13-15.
13-3 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 4"[102mm] for " joints. For wider boards, see
www.leighjigs.com.
13-5 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.
13-7
Install the e10 eBush to the router table/router table insert,
set to 5.
13-6 Prepare four similar boards ¼"× 4 ⅝" by about 8" long
[10mm × 115mm × 200mm]. For the quick fit test you will need
two test boards about ¼"or " thick. Boards of different thick-
nesses may also be joined.
IMPORTANT: Read this whole chapter
before routing any boards.
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 full a pin at
each board edge. e total number of pins and
sockets will always be an odd number.
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