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Mark from the face every
time and even though the thicknesses of your components may
vary (as they are handmade) the joint will always appear perfect. For
cutting out the mortices, I used a mortice chisel, slightly smaller than
the width of the mortice, and a cabinet - making chisel, as broad as
possible for cleaning up the sides of the mortice. To save time I
employed a brace of Mr Wake’s and an auger bit (drill) slightly smaller
than the width of the mortice, there were two other benefits from using
this;
a) it cut the full depth of the
mortices – 25mm, and
b) most important of all, it
established the angle of the mortice.
In the front and back frame the
horizontal rails fit into the uprights at 90 degrees, but the side rails
are at 7degrees to these frames. This detail is common to all the chairs
of this type that I have seen - the front frame is wider than the back.
You can miss this out and make the back frame the same width as the
front frame, then the seat is still a reasonable size (I’ve noticed that
we need larger seats than our ancestors had) and all the joints are at
90 degrees. The seat is now rectangular in plan. Definitely a good idea
if you are trying to “speed up, standardise and get them out the door”.
I have tried this and it looks
awful!
This angle (b) is not hard to
achieve and repeat if you make a jig like the one I am using in the
video clip – you can also use the jig to provide a “stop” for the drill
(a). Not a bad thing if you value the components that you have prepared
– you definitely don’t want to see the threaded bit of the drill
sticking through the other side. By the way I did not make spare bits
for my chair, so I was not willing to take any unnecessary risks.
The tenons were just sawn out using
a tenon saw and the joints were fitted individually before gluing up. I
cut and fitted the top rail first then clamped it together, checking
that it was square and the joints were tight. While that was clamped up
I marked out the tenons on the bottom rail so as to get the neatest fit
for the joints. I prefer to make the front frame first; it’s a good
“warm up” exercise before the main course.
After dry fitting all the
components of the front frame (chapter 12) I glued it together. I left
the side rails and the angled mortices into the front frame till later. |