Guess what? I finally
got my Wenzloff & Sons, Seaton tennon saw and it was worth the wait! This is the 19” inch monster. When I first tried this saw it felt too tippy
to use. Chris explained that this is an
advantage that helps you saw plumb. The
reason is that you can use the tippy-ness of the saw to tell you when you are
plumb. When you balance the saw on the
work, not tipping one side or other, the saw is plumb! It is simple physics. All you have to do is move it to and fro to
get a perfect cut. I know that there is
a story floating around that Newton discovered gravity by watching an apple
fall, but I don’t believe it. It’s more likely that a woodworker already
knew this because of his saw and told Newton about it.
Anyway, I have been practicing Chris’s sawing technique for
sawing tennons. I marked out a couple of
tennons and started to saw. In the first
picture below you can see how I have the work clamped in the vise. This way I can advance on two lines at once. The important thing is to stop when you hit
the shoulder line. The picture shows where
I stopped sawing. Flip the work around
in the vise and do the same technique on the other side stopping in the same
place. The result is that both sides are
cut down to the shoulder lines with a “hump” remaining in the middle of the
work.
Now to saw the hump, clamp the work in the vertical position
and roll the saw horizontal advancing down the hump (see the second
picture). The third picture is the
result. The tennon is ok. You can see there is some of the line left on
one side and nothing on the opposite side.
This problem is caused by our bodies.
To explain, if you extend your arm away from your body it is easy to
roll your palm down. When sawing I have
noticed that us right hander’s push the saw plate out as we slightly and
inadvertently roll our palms down. This
problem shows as the cut travels away from the line or across the line,
depending on which side of the tennon I am sawing. I think being aware of this tendency will
help correct it. I have done six cuts so
I think another 94 and I might actually make something.
- John

