So friend of mine has a Jonsered 920, he bought three chains from a dealer they make off the role. All three snapped but not where the joining link was. Very strange, the dealer says it's the saw of course, but he's never had that ever happen before. I was wondering if they sold him .050 and the bar requires .058, I don't see how that would affect the chains but who knows?
Stihl chains snapped
- Thread starter woodfarmer
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THALL10326
The Champ
If they snapped anywhere other than where they linked them together tell him to take them back and have the dealer warranty them back to Stihl. He gets 3 new ones or his money back. If the dealer refuses tell your friend to call Stihl direct. Stihl would like to know about those chains..
redoakman
ArboristSite Operative
i will place any bet the his raker are to low or his chain is dull . bad/f ucked bar (no oil chain gets hot),but im always wrong and these could be just lemon chains
tacomatrd98
ArboristSite Guru
The title says otherwise.
Well then, guess I should of read the title instead of the post...LOL
nmurph
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Elvis is back !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Gypo Logger
Timber Baron
I've seen all brands of chain break. One of the biggest causes other than the condition of the terminal parts is cutting in sub zero temps thru snow covered wood. The temp of the bar and chain fluctuate wildly causing the fracture. This also causes the bar rails to chip.
John
John
fearofpavement
Trying them all
I've seen a lot of chipped bar rails here in Georgia too and not too likely the saws have been used in frigid temps. Not sure what causes it but I do know I have never had a bar rail chip on a saw I've been using. I would have to think operator technique is involved somehow...
Not saying icy conditions can't cause it, just saying there must be other reasons as well. I think I'll start a post on that so as to not derail this one.
Not saying icy conditions can't cause it, just saying there must be other reasons as well. I think I'll start a post on that so as to not derail this one.
jughead500
Sasquatch
Only way i have seen chipped bars is by the chain getting thrown.or at least thats the only way i've been able to chip one anyway.
Gypo Logger
Timber Baron
Most rail chipping is caused by not dressing the bar often enough. A burr will eventually turn into a chip.
I use a palm sander to dress bars wether they need it or not. I still have bars I've used for over a decade.
John
I use a palm sander to dress bars wether they need it or not. I still have bars I've used for over a decade.
John
Gypo Logger
Timber Baron
A thrown chain can catch a burr causing the chip.
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Before saying much about broken chains, we should see a pic of the sprocket, the chain area around the break, the specs. of the
chain the saw requires/vs./ what the guy received, numbers off of the bar/chain/etc...
chain the saw requires/vs./ what the guy received, numbers off of the bar/chain/etc...
I had a bunch of .325/ .063 chains get broken by three different customers. I replaced them, no questions asked. All of them were back within days with broken chains again. This time I asked them all to bring in their saws so I could look at them free of charge. ALL had completely worn out spur drive sprockets. Once replaced, no more broken chains. For some reason, spur sprockets seem to be worse about this than rim sprockets.
Elvis is in the building.
lefturnfreek
Sharpen the chain, chuck chips ...repeat...
I've broken lot's of 325, even Stilh chain, where I treat it like 3/8th's. They just can't take aggressive sharpening or harsh treatment
bikemike
loud pipes save lives
Put a smaller turbo on it and ditch the nos bottles
Knobby57
Peeing outdoors
I've seen worn Spurs take out a chain . My guess is the drum floats over and the chain guys up on a higher section of the spur making it way to snug . That can't really happen on a rim. I find it hard to believe 3 chains failed due to defect in the chain even on cheapie chains. I'll bet if you check out that saw it will have something very worn or broken . It's all speculation .. Let's see some photos
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lefturnfreek
Sharpen the chain, chuck chips ...repeat...
Mine were usually broken by kick back/grabbing a log hard, or the chain brake being activated, or in the last year hitting barb wire while working a scrub pile.
Chain brake activation is big time stress on a chain and I just don't see the 325 taking it very well or often, but it can happen to any size of chain..
If it happens, I would dismount and inspect the chain. I found at least 5 chains in the last year with 1 broken tie strap and most had more cracks around the rivets.
Chain brake activation is big time stress on a chain and I just don't see the 325 taking it very well or often, but it can happen to any size of chain..
If it happens, I would dismount and inspect the chain. I found at least 5 chains in the last year with 1 broken tie strap and most had more cracks around the rivets.
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Yeah, I would love to see a close up of the ice covered chain, sprocket, and bar.
