edge geometry vs bevel geometry

[fast14riot]

Hey guys, I am a knife guy more than an axe/hatchet/hawk user and would like to add them to my repetoir. With knives, edge geometry is paramount. Just as important as heat treat. I use different edges on my knives depending on their intended purpose.

So my question is why are so many people thinning out the primary bevels on their axes to say they cut better? Wouldn't edge geo be more the reason? I have seen competition cutting knives almost 1/2" thick with sound edges go through a 2x4 in less than 10 seconds, so to me I don't see a huge benefit of thinning the bevels if a proper edge is applied. Is there something else I am missing about this seemingly common modification? I would like to pick up a belt axe and hatchet this year, but I just can't live with poor cutting performance and would like to make an educated choice.

Your thoughts would be greatly appreciated.


-Xander

 

[Steve Tall]

Most working axes have convex grinds, for a more durable edge, and are often too thick near the edge for the intended use. Thus the thinning down by the user, while maintaining a convex edge. Tuatahi brand racing axes, on the other hand, are focused on short-term performance and have 6 different grind options, each with a few different bevel variations.

http://www.bladeforums.com/forums/showthread.php/850453-Ax-Head-Geometry
http://www.tuatahiaxes.com/racingaxes.html

 

[fast14riot]

Thanks for the links! Everything I wanted to know was there. Now on to finding my first axe.


-Xander