A rounder plane makes the tenon part of a round mortice and tenon joint. ‘Tenon’ a fifteenth century French/Latin word meaning holding on, same root as ‘tenant’ one who holds land. ‘Mortice’ Norman word, origin obscure, but used since the 14th century, meaning essentially a hole that takes a tenon to form a secure joint.
Anyway, a rounder plane is a bit like a pencil sharpener. The blade is set at a tangent to a hole into which you insert the stick upon the end of which you would like to make a tenon. The infeed of the hole is conical, the end of the hole is a cylinder of the desired finished diameter. Very simple. No idea when these things came to be made, but they are very handy when you don’t want to use the lathe e.g because the rest of the blank is very irregular, and would not turn well, like the leg of one of my deer:
(These are old ones, I prefer to choose leg branches with ‘knees’ in now)
So, making a rounder plane, first turn your blank:
This is just two handles and a thick bit for the cutting business where the blade will be mounted.
Then thin the middle down with flats:
Bore a hole of the appropriate finished diameter This one is one inch):
Sorry about the lack of focus; it’s getting rather gloomy in my workshop at this time of year, no direct sunlight for a couple of months.
Then the infeed, where the stick starts its journey into becoming a tenon, is opened up into a cone (I used my knife):
Funny, if you’d asked me, without looking at the plane, I’d have said the hole was in the middle, but, of course, it’s offset to give more meat where the blade is mounted.
Then a couple of saw cuts at accurate angles to finish the blank:
Now I think you can see how the stick blank is gradually cut down to a cylinder. The blade will be mounted on the left-hand flat. Just need the blade and fixings … I have this idea … If your stick is thicker than the entrance hole, you’ll be needing some work with the draw knife.
Been making this too:
And mending clogs:
New heels with beech wedges to take up the wear. Just need the glue to set and then trim.
To be continued …