Frame Mortise & Tenon Jig User Guide
49
Chapter 7
SPECIAL JOINTS
7-9 Here’s an example.
1
⁄4"[6mm] joint through 1
1
⁄2"[35mm] deep mortise.
Select
1
⁄4"[6mm] bit for mortises
➀
.
Select
1
⁄2"[10mm] bit to rout the 1
1
⁄2"[35mm] long tenon
➁
.
Select
3
⁄8"[8mm] guide
➂
for length from the guide/bit selection
chart in Appendix I.
1
2
3
7-10 Carefully sight the mortise taking particular care to center
the “vertical” line
➀
in the sight. Plunge and rout down deeper
than half the mortise board depth.
1
7-11 Turn the mortise piece end for end and, keeping the same
reference side of the mortise board to the clamp face, carefully
sight the “vertical” mortise center mark
➁
and lock the table .
Plunge and rout to clear the through mortise.
2
7-12 Rout the tenons with the larger (longer) bit slightly deeper
than the mortise depth.
7-13 It may even be possible to make tenons long enough to be
raised if this decorative effect is desired. “Wedging” the tenons is a
simple hand procedure and a nice decorative touch.
7-14 If the tenon stock is smaller than the table opening it may
be possible (after sighting) to slide the tenon workpiece up to
almost touch the router base and thereby gain an extra
1
⁄2"[10mm]
of tenon length. Assuming of course that the bit has sufficient
cutting depth.
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