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Travisher


A travisher is used for carving, shaping and finishing chair and stool seats. It is closer in concept to a wooden spokeshave than a plane. A hand plane is set for a specific depth of cut. By contrast, the travisher can vary the depth of cut using finger pressure. …

. Forward pressure = light shavings. Back pressure = heavy shavings



I have made two travishers, with different curves.





The one used in the Three-sided Stool was the one below with shallower curve ...





These were built about 5 years ago. The design came from Peter Galbert and, then Claire Minihan's video several years ago. Claire's video is (was) a little dated in that the (straight) mouth/blade has since been replaced with a fitted design (I gleaned this from photos). The shallow travisher has the straight blade, and the more curved one has the newer design ...





They both work well.

Here is the plan I made at the time. This would be easy-enough to gauge by eye. The one has an 11" radius and the other a 5 1/2" radius. The latter is akin to a "jack" and the flatter one the “smoother". 





I made the blades from 2.5mm O1 stock ...





Bend the annealed steel in a form in the vise ...





A little spring back ...





I heated the blade in a “gas oven” I built (a grand name for a sheet of stainless steel and a couple of bricks) …




cooled it in peanut oil, and then tempered in the kitchen oven.



The blades turned out as well as I could have hoped. Of course, now you can simply purchase them for Elia Bizzarri.

Cleaned up ..





Interestingly, the back hollows a little, which makes it easier to create a coplanar surface.

Grinding the blade on a former ...





Managed to get close to 30 degrees for the bevel ...





Fit the blade and a brass mouth (easy to bend cold) ...





Attach them with metal inserts ...





Shape the escapement ...





Grind the brass mouth so that it lies a smidgeon of a mm lower than the blade, and curves about 3 degrees towards the toe ...





This shaping is critical how the travisher is used ... with pressure on/off the toe - more on the toe decreases the depth of cut, more on the heel increases the depth of cut.

You can go ahead now and finish the shaping of the body ...





Regards from Perth

Derek

November 2020