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Chapter 2 Frame Mortise & Tenon Jig User Guide
MOUNTING THE ROUTER
2-3 If you have a plunge router that is not listed in the Sub-Base list,
it is essential that your router have two parallel fence rod holes through
the router base. These must be at least
5
⁄16"[8mm] in diameter
➀
. Fit
the correct shank sized centering mandrel to your router, place it on the
Sub-Base and plunge the mandrel into the base hole. Place the fence rods
through the rod holes with an equal amount protruding at each end.
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2-4 Take the four U-Posts and by trial, establish which four
Sub-Base slots or holes will serve to attach the U-Posts. Mark these
with chalk or sticky tape and follow instructions 2-5 through 2-29.
2-5 Most plunge routers will be mounted to the Sub-Base like this,
with rods through the fence rod holes
➀
and clamped down with the
U-Posts
➁
, but it is essential that the correct shim spacers
➂
are
selected.
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3
1
2
3
2
2-6 Depending on the make and model of your router, the height
between the underside of your router and the bottom of the rod
hole
➀
will vary. This dimension will determine if you need to
use low
➀
or high
➁
shim spacers, or possibly both together
➂
.
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2
3
2-7 To measure the “rod height”, place the router on a bench.
Either use a calliper
➀
, or insert a rod (flat side up) and use a good
rule to measure between the bench top and the bottom of the
rod
➁
.
0
10
20
30
40
50
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2-8 If rod height is between
3
⁄16"[4,5mm] and
3
⁄8"[9,5mm],
use low shim spacers
➀
. If rod height is between
3
⁄8"[9,5mm] and
17
⁄32"[13,5mm], use high shim spacers
➁
. If rod height is between
17
⁄32"[13,5mm] and
3
⁄4"[19,5mm], use both shim spacers
➂
, with
the high one on the bottom. Note: If the rod height is less than
3
⁄16"[4,5mm], see 2-9.
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