In my last post I said I would re-sharpen the Drabble and Sanderson to try Mark Harrell’s hybrid sharpening, but I decided to leave that one with 10 degrees of rake and 10 degrees of fleam. Instead, I re-toothed my 12” Spear and Jackson Leap Frog carcass saw from 10 tpi to 12tpi and applied Mark’s hybrid filing to that. I figured it would be good to have a 12” carcass saw with a combination filing as well as a 14” sash saw.
Mark also recommends 10 degrees of rake, but he relaxes the rake on the first 30 teeth at the toe and the last 20 teeth at the heel to give each stroke an easier start and finish. He doesn’t say by how much he relaxes the rake, so I went for 12 degrees. Instead of the 10 degrees of fleam that I filed on the Drabble and Sanderson, I tried the 17.5 degrees of fleam that Mark suggests.
If truth be told guys, I’m playing now. My head tells me that there is no need to relax the rake because I don’t have a problem starting a saw with 10 degrees of rake. My head also tells me that when you start to consider ½ a degree of fleam, it is time to hang up your saw set. Does ½ a degree of fleam really make a discernible difference? I doubt it, but Mark is the real deal and his saws speak for themselves, so I had to try his formula.
Well now I’ve got two saws filed with different combination tooth geometries, but which one’s best? There’s only one way to find out….....FIGHT!!!
It didn’t really surprise me that Mark’s filing with 17.5 degrees of fleam produced a better crosscut finish and Matt’s 10 degrees of fleam produced a better rip finish. The problem is that now I can’t help wondering if 15 degrees of fleam would be a nice compromise between the two. :o)
Thanks for watching!
-- Andy -- Old Chinese proverb say: If you think something can't be done, don't interrupt man who is doing it.