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RTJ400 User Guide
Half-Blind Dovetail Joint Procedures
Chapter 9
9-40 Record your perfect fit eBush setting on one of the drawings
provided above.
9-39
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.
9-41 Flushness
IMPORTANT NOTE: Do not adjust
flushness until correct joint tightness in previous steps is achieved.
Follow steps shown.
You must reposition the sidestop each time
a reset for flushness is made.
Each pin position changes the joint
flushness by 0.013"[0.33mm] Record the pin setting for future use.
Note:
Tail board thickness does not affect flushness.
■
For over flush pins,
move frame pin to
a minus (“-”) pin
position and rout a
new test joint.
For under flush pins,
move frame pin to
a plus (“+”) pin
position and rout a
new test joint.
OVER FLUSH
UNDER FLUSH
9-37 Rout in each template opening.
The eBush must touch
one side of the opening as you enter and the other side as you exit.
9-38 Test for Fit
If the joint is
too loose,
turn the eBush to
a higher number as shown in the next step, and rout the other
end of the test board. If the joint is
too tight,
turn the eBush to
a lower number and rout the other end of the test board.
TOO LOOSE TIGHTEN
TOO TIGHT LOOSEN
9-36 Clamp a
test
pin board in the jig against the sidestop
A
,
bringing it forward until it rests against the shop made limit
stop
B
.
B
A
Rabbeted Half-Blind Dovetails cont.
Sample
Leigh 80-500 Bit
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