Why did this happen?

[aob9]

Just looking for a little advice. Does anyone know why this may have happened. Luckily, I spotted it on a routine check after refueling. The bar is reasonably new with no wear and no obvious signs of damage. Oiling is fine and the chain was not too tight (IMO).

[elicokiz]

looks like youve been running your chain too slack or youve taken too much down on your depth gauges ...the heels on all the links you can see in the photograph are all warn down, only a mater of time imo until the remaining metal fractures. you where very lucky not to throw a chain my friend?

[Graham]

Fractures in links are not uncommon. Happens to me occasionally.

[GardenKit]

Just looking for a little advice. Does anyone know why this may have happened. Luckily, I spotted it on a routine check after refueling. The bar is reasonably new with no wear and no obvious signs of damage. Oiling is fine and the chain was not too tight (IMO).

looks like a 90sg or 91vg chain. The fracture has occured on the joining link used to make the chain. These small chains are quite tricky to join and its all to easy to get a tight link. If the joint does not pivot easily it will fracture just as yours has. As Graham has said however, links also fracture occasionally for no aparent reason.

[scottythepinetree]

looks like a 90sg or 91vg chain. The fracture has occured on the joining link used to make the chain. These small chains are quite tricky to join and its all to easy to get a tight link. If the joint does not pivot easily it will fracture just as yours has. As Graham has said however, links also fracture occasionally for no aparent reason.

 

Second that, clearly a joint link. No writing on it. Reckon whoever put it together was a bit heavy handed with the rivet, head looks a little flat.

[skyhuck]

looks like youve been running your chain too slack or youve taken too much down on your depth gauges ...the heels on all the links you can see in the photograph are all warn down, only a mater of time imo until the remaining metal fractures. you where very lucky not to throw a chain my friend?

 

Can you not see the rackers in the picture??, I would say they really need taking down more than they are.

[Graham]

It may have been joined with a tie strap removed from another chain. They get bent slightly and then straightened. Done it myself in an emergency:001_smile:

[aob9]

Thanks, it's a 91vg chain on a 12" bar. It's a small Tanaka saw I use for light work. I have a Jonsered 2152 for heavier work. I purchase my chains from a local outlet and this is the first time I've seen this. Yes indeed, I might have thrown a chain but I'm glad to know that this is something (else) I need to keep an eye out for.

[Mozza]

Can you not see the rackers in the picture??, I would say they really need taking down more than they are.

 

I was thinking that, if anything they are high, for me anyway!

[Old WoodChip]

poor rivet, whoever done it must have been practising