A photo essay of making and fitting the blade
I started with 1" wide x 2.4mm thick O1 steel. You may make out my scratched marking ...
The cut out blank(this is already quite different from the video) ...
The jig to cold bend the blade ...
In compression ...
This is how much springback there was ...
This was the second blade I made. The first was bent around a template of the final shape, and with the springback was far from the desired curve. The second time around I was ready for this and just bent it enough to fit ... got a little lucky ..
How it fits ...
For heat treating I made up a small oven with some scrap stainless steel and bricks. The MAPP gas was only just hot enough to get it to the desired red.
... and then it went into the oven. Luckily my wife was busy baking Christmas cakes. I made sure she first sampled the brandy ...
This is the completed blade. Interestingly, when the steel is bent, it becomes concave along its length, which is like adding a hollow grind. This makes it easier to hone the back of the blade.
This is the jig for grinding the hollow. When the steel was flat I ground a shallow bevel - just enough that I could register the wheel on the centre of the bevel as I was after 30 degrees. (The eagle eye will note that the white Norton wheel is back - a rounded edge is needed to grind the inside curve).
The brass mouth was made in the same manner.
This is resulting hollow grind ...
.. and angle ...
Fitting the blade and brass mouth: the basic shape o the travisher has been cut out on the bandsaw. The fit between sole and blade is a little off ...
After rasps, files and scraping ...