Primitive Archer
Main Discussion Area => Bows => Topic started by: Tracker0721 on March 20, 2018, 08:10:01 pm
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Sanding my osage down for final finish and I noticed a dark little line. I used the scraper and followed it down a bit and it’s now this little guy. Mid limb belly. Super glue in it is making it look dark. Only crack I’ve ever had going against the grain so I’m a wee bit scared.
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Also, that spot was heated and flattened as it had a sizable bend both sideways and towards the belly(if that makes sense)
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Tracker, that's either a chrysal or a crack caused from your straightening.
Chrysalis are caused when that area is bending too much in relation to the rest of the limb.
In other words the tiller is off. If it is a chrystal scraping would worsen it.
Cannot tell without seeing the tiller.
Jawge
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Well shoot. That spot is a weak spot I’ve avoided like the plague. Had a knot on the side that came out and splintered in so it got pretty thin. It didn’t look too hingy during tillering though. Didn’t check after scraping in that little bit. If it is a Chrystal can I sinew wrap that area or just know it’s days are numbered?
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It could be from straightening that area. If that's the case the superglue should do the trick. It's hard to tell what it is from that picture. Can you post a full draw?
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I sure will tomorrow. I’ve got epoxy drying on the nocks so I’ll shape those and get it strung up for a picture.
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Is the crack raised like a miniature mountain peak, or flat? Brace a draw the bow. If its still flat, its fine, if its raised like a bump, its bad.
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If there was a big hump on the back/dip on the belly there that you tried to straighten out, I'm guessing you went too far and that it failed in tension.
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Im with this ^ guy
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My experience has been, if its a crack from bending, it will keep a coat of poly on it without bringing the crack through the top of the finish. If the crack is in fact a chrysall, the finish will also crack after exercising the bow a bit.
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I get those from bending sometimes, no big deal, most of the time they will disappear during the final tillering. I always give them the superglue treatment just to be sure.
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Here it is. Didn’t raise, doesn’t look hinged to me, didn’t grow. The blue arrows point to it. My top fade is a bit long and has a bulge forward than back so it looks really wonky to me right now. If I could overlay a grid the tips are on a vertical line parallel to the grip right now.
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I have dealt with these a lot before when I had less patience and practice setting up for bends, etc... and the key is in the tiller. If it truly isn't hinging, you are good.
If it is, you can saw a kerf right there and jam a patch in with glue. If it's the result of a bigger soft spot that's tougher.
OR, you can tie on a stiffening patch to the front. Get a scrap of osage with a chased ring for a back, about 2-1/2" long and 1/8" thick or so, and heat bend it into a shallow "U" shape. Bevel the edges so it will blend in, spot glue it to the back of the bow, and tie it down with sinew or fine twine so tightly you pull the "U" out of the patch. Don't glue it. Doesn't seem like much, but if the hingey spot is 1/100 of an inch too thin, 1/8 of an inch will stiffen it a good bit.
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Looks like a tiny tention fracture to me.your good to go !imho!
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Tracker, I don't see any hinging. Looks like it happened from the straightening process.
I've had that happen. I put in some superglue and then wrapped it. With thread coated with epoxy. You could also used sinew inside glue. Up to you.
Jawge