Burnt up sprocket nose on a new 42" bar

I haven't replaced one, my bars usually require replacing long before the nose goes.
It wouldn't hurt to save a nose or two from spent bars just in case you damage one but I'm not sure if you can purchase single rivets.
 
Kevin the answer from Roland at tree stuff said was what I already stated,they put 3/8 sprocket tips on .063 bars and went un noticed for a while. My 3rd bar should be here today and was told has the right tip on it!


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There isn't anything wrong with putting a 3/8 tip on a .063 bar as long as the 3/8 pitch chain gauge is .063 to match the bar , not the tip.
If you gave me the numbers I asked for it would prove that the pitch on the chain doesn't match the pitch on the bar nose or the pitch on the drive sprocket which is the cause for the problem.
I want you to understand why the tip failed so you don't have to rely on misinformation from anyone else.
When you get a bar and chain from a dealer you can check the numbers yourself to make sure you have a match.
 
Yeah ok I'll
Count them Kevin, I understand fully what has happened no problem
There I should of
Clarified what I said, Oregon put a .058 3/8 sprocket tip on .063 bars which in turn burned up the sprocket nose as you have a bigger chain trying to turn around a thinner sprocket


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I'm not sure how a .058 chain would burn up a tip on a .063 bar as long as the pitch matched.
The chain would be sloppy in the bar which would give you a crooked cut and put wear on the bar and chain but not the tip.
From what I can see in the picture you posted your new bar will suffer the same consequences as the old bar if you put that same chain on it.
I had Glenn from Oregon look at the picture of your chain and he identified it as 68JX, which is a .404” pitch chain .
If you put that same chain on your new 3/8 bar again it will kill the nose sprocket again.
http://www.oregonproducts.com/pro/products/chain/68LX.htm
 
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