Originally Posted by
Derek Cohen
Hi Kees
If you are comparing a 45 degree BD to a "steeply bedded" BD plane, then I would agree. But not if you were comparing to a BU plane. The low centre of effort of the BU plane makes a significant difference in reducing the "lightness to push".
I am not sure where you get your information about BU vs BD blade wear? A 45 degree bed BD plane consistently demonstrated significantly more wear than a 12 degree BU bed plane in my recent shooting plane comparison.
Regards from Perth
Derek
Derek. To your second point. IIRC, you tested longevity comparing the higher angled LN 51 w/CB against a lower angled BU LV shooter right? Wasn't your conclusion/hypothesis that the decreased amount of effort/force needed when using the lower angle to shoot endgrain contributed to better edge retention?
This isn't really applicable to what Kees is saying. He's speaking of planing long grain with a 45-50 degree blade with CB vs 55 degree or higher w/o CB. If in fact it is true that the less effort, lower angle of attack=longer edge longevity than he is correct that the BD plane with CB would last longer than the BU at a high angle. I'm not saying that is necessarily true, perhaps even the high blade bevel angle would offset things and bring the BU back to top for retention, but it would need to be tested. I don't know that answer, but I'm not sure you can extend your shooting plane test to this situation,it seems like an over extension of the results.
(EDIT: Kees beat me to it...I'm also not at all soured on BU planes...in fact they are growing on me, but I do love me some BD with chipbreaker action)
Last edited by Chris Griggs; 12-03-2013 at 10:14 AM.
Woodworking is terrific for keeping in shape, but it's also a deadly serious killing system...