Jacob
What goes around comes around.
20º is really difficult to start and to maintain because of the amount of metal you have to remove (longer bevel), and also fragile. Can't say I've ever felt the need. I've done paring chisels down to 25º.ED65":1x74zzp8 said:I going to challenge Jacob here to take two chisels, ideally the same size but if he doesn't have any duplicates say a 1/2" and a 3/4" so they're fairly close together in size, and hone one to 20° and the other to 40° and compare how they do at paring and chopping deep mortises in oak or a wood harder than that.
He'll find out the only way he'll accept that a difference in performance between the two is anything but "mythological".
And the great thing about this is he can't use any excuses like it would take him too long, hasn't he said a million times how quick and easy freehanding is, how nobody needs a grinder? So manually forming a new 20° bevel won't take him but a few minutes and minimal effort 8)
40º I've never done either - even less need!
I tend to do everything at 30º, with convex bevel.