Oregon chain breakage !!

[Wicked500R]

I was running the 272 with a 24" bar buried flush cutting a stump... All of a sudden I see the chain disappear from the bar Pull the saw out and the chain snapped like a piece of twine.... Oregon .058 chain brand new! Whats up with this? Another reason why I don't like Oregon....

 

[William Balaska]

Looks bent like it was piched

 

[Wicked500R]

Looks bent like it was piched

It wasn't pinched... I bogged the saw a couple times... but it was cutting smooth for the most part... If it was pinched... the bar would of been jammed a little, no? My 1st thought was damn this saw's got some torque!!

 

[wanab]

Looks bent like it was piched

i agree, it looks to have been impacted.

 

[056kid]

Uoy dont even have the drags cut down.. Thats very very peculiar!

 

[Wicked500R]

Uoy dont even have the drags cut down.. Thats very very peculiar!

Drags as in rakers?? It was a brand spanken new chain !!

 

[056kid]

The only thing that i can think of is that a raker AKA drag smacked some metal in the wood. Or you have one ppeeepppppppyyyyyy 272!!!!!

 

[Wicked500R]

The only thing that i can think of is that a raker AKA drag smacked some metal in the wood. Or you have one ppeeepppppppyyyyyy 272!!!!!

I know for a fact there was no metal in the wood I was cutting

 

[Crofter]

I bet Oregon Engineer would like to get his hands on that chain and do a Brinell hardness test on those drive links. That is not a brittle fracture. There is a lot of distortion but do I see some abnormal wear on the front of the drive tang just above the drive link scraper scallop about the 5 oclock position of where the rivet hole should be in the drive link? From the look of the top cutter plate two teeth back, you hit embedded metal but where the force came from to open the link like that is a mystery unless it was dead soft and missed the heat treatment. I would definitely try to contact Oregon technical people. You could always suggest that otherwise, you are quite sure Stihl will trade a new chain of theirs, just to have a look at that one, Lol! I would have some fun with that one: Just make sure there is no problem with your sprocket. Examine the rest of the drive links for any sign of localised wear on the drive links where the fracture originated in that link.

 

[Tzed250]

Looks like way to much hook in those cutters...

Was the bar new? Was the sprocket new?

 

[aj-allen]

Broken chain

There was clearly an impact on the drive link. Some thing was caught between the drive sprocket and that drive link.

AJ

 

[2000ssm6]

Now tell us the truth, the 361 was the one who broke it, right?

 

[stihl sawing]

:agree2: :agree2: Yup, Something got jammed in there.

 

[Wicked500R]

Now tell us the truth, the 361 was the one who broke it, right?

Yea...riiiight

 

[ray benson]

Take a close look at the bar and the drive sprocket for wear or misalignment.

 

[Wicked500R]

Well the bar is a brand new Total Super pro...The sprocket shows a little wear... I was on my way to replace it with a new one to match the new chain just to have new stuff.... I was only going to cut this one stump with it because I knew the "cough" 361 wasn't going to handle it... 3/4 the way through, It snapped... never heard of a chain breaking, even with a worn sprocket

 

[cuttinscott]

Take a good look at the sprocket tip you might have a roller bearing missing that rode down the bar groove till it caught in the sprocket and broke the chain.....


Scott

 

[stihl sawing]

I have used a lot of of that very same chain, Never had a problem other than it stretching to fast.

 

[redprospector]

Flush cutting a stump it could have been anything. Part of the saw, part of the earth, etc. but something got between that chain and the drive sprocket.

Andy

 

[Fish]

In all fairness to Oregon, and for educational purposes, show a pic off the
sprocket.

I have a feeling that it is worn out.