End Snap

[neuse]

I can not figure out what I am doing to cause so many pieces to break.

I think it is end snap, but I can not figure what causes it, so I do not know how to stop it.

Help Please

[Tower]

Without seeing what your doing . I would venture to say that your not stabilizing the entire  point properly when knapping. That's the quickest way I know to fold them.

[Outbackbob48]

Sounds like a support problem, but like Tower said with seeing it's hard to tell. I used to break alot due to end snap when I would try thinning from the base end. Better support and better accuracy helped alot, that an hittting alot of rock, tonnage helps . Bob

[cowboy]

Hey Byron think we all need a little tune up. Sounds like end snap support issue. Or maybe platforms not quite below center. Need to sit with ya like Don says.

[JackCrafty]

Sounds like you are working glass or obsidian.  End snap is part of the game with that stuff.  Try not to thin from the base.  In other words, thin from the sides.  And make sure all platforms are below the centerline of the workpiece.

When a stone snaps in a place where you didn't hit it, it's cased by bending stress.  If it snaps right where you hit it, it's caused by a crack that spreads in the wrong direction.  Either way, it means you are applying too much force.

[neuse]

Ok thank you. It is breaking in a place other than where I strike it.
 I will limit my end thinning and provide better support.

[neuse]

Cowboy,
I need to schedule a time to come visit you.