The Woodworker & Woodturner – August 2019

http://www.getwoodworking.com August 2019 The Woodworker & Good Woodworking 41

18 Try fitting the key into the opening

15 Now start to shape the bevel along the

edge of the key

19 Pencil marks are an aid to show where

the high spots are

16 Repeat the process to cut a matching bevel

on the walnut

14 Keep checking the curve

The completed dovetail key in maple and
contrasting walnut should look something like this

17 A little at a time...

finish exactly on the edge of the curve if the end
result is to look as though the key is a perfect fit
into the walnut. It’s not easy! Just a little at a time
(photo 17) and don’t cut into the top edge. Ideally
it should be a smooth bevel all the way along
the curve. Keep checking by pushing the key into
the opening at an upwards angle (photo 18) and
making pencil marks at any high spots (photo 19).
Keep persevering until the key is a sliding fit all
the way along to the other side. I aimed for a tight
fit as a sloppy fit will make it too easy to solve the

puzzle. I managed to achieve a fit that required

a firm push with the thumb to open it knowing

that with use it will soon loosen up a little. Finally

trim the walnut to length ensuring that the key

is located centrally and sand to a smooth finish.

It will take a few hours, in my case sat at the

kitchen table for the trimming, but the end result

is worth the effort. I didn’t bother with any finish

as the constant handling will just add natural oils

and patina. Most people who have seen this are

totally stumped by it, which was the object of the

exercise. As for my dad, I might tell him how

it works... eventually, but I think I’ll make him

suffer for a bit before I reveal the secret!