I've got a couple of questions on bevel angles.

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cheekyboy

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Hi all, am wondering which is the best bevel angle on my chisel when paring oak,maple and ash?? :?

also, are there any benifits to having a back bevel on a low angle block plane? if so which angle ? or will the ruler trick do? :)
 
Best angle is the most acute which gives acceptible edge life whilst getting the job done.
This depends on the steel (each chisel you own will be slightly different,) the stock and your idea of a paring cut.
20° - 25° a good starting point. If the edge fails to quickly, hone a smudge higher and try again.

Re block plane back bevels, you'll get lots of differing opinions - all the way to "block planes can't work because the relief angle's too shallow even without a back bevel" (wish someone had told Stanley et al)
 
In terms of how the plane performs there is no advantage in back bevelling a block plane on the flat side of the blade as this will not alter the effective pitch. You can alter performance by honing a secondary bevel on the face of the blade.

Ruler trick it by all means but don't let the polished bit go beyond what you can see through the mouth when you turn it over (otherwise you will start to interfere with the way the blade is supported almost up to the edge).
 
There's no advantage to just back bevelling a bevel up blade* such as a block plane, nope - but it can give you the opportunity to use a lower main bevel angle, the back bevel providing a necessary overall angle strong enough to actually survive. Obviously it's only a handful of degrees, but it can be helpful.

*If we're not counting the ruler trick for sharpening, but that's another matter and one which I will happily avoid going anywhere near. :wink:
 
Can't claim credit; an old dodge I picked up somewhere. Well, practically everything turns out to be an old idea in the end. You'd have to be up before Noah to have an original woodworking idea, I reckon. :lol:
 
A good example would be the No. 9 Mitre Plane.

10 degree back bevel reduces clearance angle to 10 degrees.
Honing at 20 degrees lowers Effective Pitch from 50 to 40 degrees, while maintaining a 30 degree edge.

David Charlesworth
 
Thank you all for help . Am going to resharpen my things later with my new water stone set up and veritas mk11 honing guide :D :D :D

Thanks again this forum is the mutts nuts
:D
 

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