Originally Posted by
ken hatch
Steve,
Correct me if I'm wrong, also part of their experiments is the use of a very shallow bevel to lessen the wedging effect. The Sellers comment was with tongue slightly in cheek, I've been as guilty as many on this forum of being shocked, I tell you shocked, of someone having a convex bevel and/or using a buffing wheel.
BTW, One of the things I've learned well over my many years of teaching is how to eat crow.
ken
Ken,
My bad; I should have picked up the tone of your comment. The Internet is where sarcasm goes to die.
Correct on the bevel, as far as I understand it. Dave's hi-mag pics show a very steep bevel, 45-ish, transitioning to around 25 over about .005", and then farther back giving way to a primary bevel around 20. The steepest part, the part that's 45-ish, is maybe .001". So the steep part provides durability, but there's no steel behind it to act as a brake, so effort is reduced.
If you go to around the four-minute mark in Dave's video ( https://www.youtube.com/watch?v=kH3deOUmCPg ), you can see it for yourself.
"For me, chairs and chairmaking are a means to an end. My real goal is to spend my days in a quiet, dustless shop doing hand work on an object that is beautiful, useful and fun to make." --Peter Galbert