6262
RTJ400 User Guide
Box Joint Procedures - 3/16"
Chapter 12
12-19 Rout into every opening.
The eBush must touch one
side of the opening as you enter and the other side as you exit.
Do not remove the routed board or the backer board.
12-18 Now that your joint tightness has been determined,
re-clamp pin board 1 with the side edge against the sidestop, the
end edge flush on the template.
12-14 Quick Fit Test To save time and wood, clamp the two
¼" thick scrap
test
boards in the jig, back to back
A
.
Review
the remaining steps in this chapter.
Rout both boards at the
same time. Repeat again with the frame in the
No.2 BOX JOINTS
hole. Join the routed boards and make joint fit adjustments in
the next steps. Don’t worry about board edge alignment, the test
is for joint fit only.
TOO LOOSE TIGHTEN
TOO TIGHT LOOSEN
12-15
Joint Fit Adjustment Keep the same side board edges
together. If the joint is too loose, turn the eBush to a higher
number, as shown in the next step. If too tight, turn the eBush
to a lower number.
12-16 Each increment on the eBush changes the joint glue line
fit by 0.002" [0.05mm]. Half an increment, a mere 1000th inch!
Re-tighten the eBush nut after each guide bushing adjustment.
If necessary rout further test boards until correct joint fit is
achieved, repeating Steps 12-14 through 12-16.
12-17 On the eBushes above, record the settings you used to
achieve perfect joint fit. The first eBush is an example of how to
record your setting.
Sample
Leigh 166C Bit
A
A
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