Primitive Archer
Main Discussion Area => Bows => Topic started by: mrfixitwhite on May 30, 2013, 06:50:44 am
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Hi all
Im hopeing to get a few opinions on the bow failure in the pictures.
It's a bow I tillered for a friend and while it did shoot for a couple of sessions -went bang :(
If I could post pics and let people see before I fill in any details
My question will be stave fault or tillering fault.
hopefully the pictures explain themselves.
Thanks
Graham
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Grain run off :o Looks like a straight bow cut out of a snakey stave. Was the stave hand split or sawn out of the log?
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It was supplied to me shaped for final tiller!-width as in the pictures but in 'Hulk' draw weight thickness! hence the pieces sawn from the belly side.
Im gonna have to guess sawed to shape and then power sanded to rough bow dimensions.
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That stave has severe grain run off! The break follows the grain precisely. The first picture is as clear as can be. Someone really violated the grain (bandsaw?) when the width layout for that stave was established.
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I highlighted the grain. The red lines are the grain in your bow. They curve off the side of the bow. The green lines are more like what the grain should be. I would guess it was a sawn stave or a straight layout on a snakey stave. Always follow the grain lines. Hope this helps. Good luck on the next one.
(http://i141.photobucket.com/albums/r55/clintanders/Photobucket%20Desktop%20-%20CLINT-HP/New%20bow%20stuff/20130528_145330Medium.jpg)
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Agree with all the above entirely, but your handle fades appear to be part of the culprit. Looks to me you are to thin right at the break.
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I've just had a quick measure and the limb thickness at the break is at least 3/4" thick.
Would that be considered too thin?
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I think I would request my money back or a replacement stave, that thing has severe grain runoff.
Grady
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It's only a whisker thicker than the widest part of the limb and appears to be half again as narrow. It was bending in the fades and that is where the grain run out starts. Broke right there along the grain. If it wasn't bending in the fades, it was highly stressed there. That's what I'm seeing from the pictures.
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It did exactly what It was supposed to do when grain is not followed and run off so badly. Where did u get stave? Looks like a bandsaw cutter just shaped with zero regard for grain.
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It was bought off of eBay. Not out to place blame by naming the seller but they have stated tillered wrong as cause of failure.
Just trying to get some opinions as to whether it would have gone regardless of tiller?
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Yep,most likely. :) Following the grain where bending is happening is crucial. :)
You have to be very careful when cutting a shelf or sight window that it is not going to bend in the area you violated the longitudinal grain. :)
Pappy
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Looks like evilbay bit ya in the butt...not all who sell on there are "experienced" people...if he's stating it was broke because of the tiller and he cut it out like that he is either a naive novice,or a no good liar just trying to cover his tracks and feed you a line of bull&**@...even if you kept the "bend"away from those fades I'm sure it would still have a very high chance of breaking regardless of how well it was tillered......arrrrrgh...I hate evilbay scums and YouTube know it alls... >:(
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Agree with that. It was "cut" wrong and the grain violation would be a no go for me regardless of design. Destined to break 'em if you start with that kind of violation. You just hastened the failure by letting it bend in the fade.
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Grain run off :o Get your money back and write a bad review. I do see that the limb that split looks to have taken lots of set. I wonder if that happened during the break? IDK, but I do know that that dude sold you a fancy piece of firewood, not a self bow blank.
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Lol err that's actually the shape of the limb ! If you see the pic with the 2 pieces held at the ends, that's the limb tips-the spare I cut from the belly to get it to even start moving :O
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That was a junk bow blank. Did you send the guy pictures of the break and the grain lines? You should try to get a refund or replacement. Your pictures clearly show the run off. This should be a great lesson to beginners. Always follow the grain. A guy showed me a bow blank at the Classic that he had got in a trade. It had beautiful snakey grain down the length of both limbs. But somebody had cut it stove pipe straight and ruined what could have been an amazing character bow.
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yes emailed him today with the same pictures on here. still don't expect a refund though!
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Ask for a replacement. Maybe you will get a better stave.
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notify ebay as well if he doesn't comply. They have measures they can take as well. May not have much teeth, but it can't hurt.
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Looks like it would have been a lovely snakey if the grain was followed and not just sawn through indiscriminately. :(
Guy needs to replace it or give you your cash back. Then maybe recommend him a few links to here and the bowyers bibles...
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Ebay makes it too easy to make money. Anybody can go whack a tree down and sell it without ever making a bow or even thinking about it. Its just money flying around and they grab as much as they can. A blind man could have seen that violation, there is no acceptable excuse for not getting a refund. I wouldnt take another stave from him in exchange either, its clear he is clueless. Get your money and find a better source.
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i think most of the ebay sellers just use a saw to cut strait lines because its easy, even if they did know about grain they may not care.
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Nothing to add to what has already been said. Whoever cut that didn't know or didn't care.
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Yep everyone else has said it way to much grain runoff it's obvious
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Well I think I have my answer :) Thanks for all the comments. Hopefully he'll cough up! I'll point him to this post !
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Well I think I have my answer :) Thanks for all the comments. Hopefully he'll cough up! I'll point him to this post !
I would atleast try to get another stave if he doesn't want to give up the money
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If he offers a stave, tell him you'll cut it yourself. ;)