Saw-Chain Dulling Far Too Soon

 
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Old 12-29-2017, 08:55 PM   #1
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Saw-Chain Dulling Far Too Soon


Out sawing timber, every now and then I've noticed sparks tossing from the chain and from what I've experienced, this is probably due to the kind of wood being hedge. Other than that, have been piecing out downed ash mainly which has been sitting for at least 7 mo's. (unfortunately can't seem to recognize hedge on sight, but I do know how it burns!)

Recently the ground has frozen and with it the wood.

Are my chains losing their edge from frozen wood or the hedge or both?
- If it's the freezing then I might let things warm up a bit.

Last edited by artinall; 12-29-2017 at 09:07 PM.
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Old 12-29-2017, 09:06 PM   #2
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Re: Saw-Chain Dulling Far Too Soon


Cutting any type of wood (frozen or not) won't throw sparks. If you're cutting logs on the ground mostly likely your chain is hitting rocks, stones, gravel. But even hitting dirt will dull the chit out of your chain in no time. If you have frozen snow stuck onto the wood it may be embedded with gravel as well.

Is your chain going dull quickly? If so you're hitting gravel and dirt.

If your chain is holding a sharp edge it could be sparks coming out the muffler/spark arrestor. dunno.

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Last edited by kirkdc; 12-29-2017 at 09:48 PM.
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Old 12-29-2017, 09:16 PM   #3
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Re: Saw-Chain Dulling Far Too Soon


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Originally Posted by kirkdc View Post
Cutting any type if wood (forozen or not) won't throw sparks. If you're cutting logs on the ground mostly likely your chain is hitting rocks, stones, gravel. But even hitting dirt will dull the chit out of your chain in no time. If you have frozen snow stuck onto the wood it may be embedded with gravel as well.

Is your chain going dull quickly? If so you're hitting gravel and dirt.

If your chain is holding a sharp edge it could be sparks coming out the muffler/spark arrestor.
I'm taking precautions not to hit dirt or rocks, etc. There is no gravel where the wood is. Old forest growth.

You've not heard of sparks coming from hedge? It's about the densest wood I've ever cut, anyway.

Sparks are throwing off the bottom of the chain, on exit. There wasn't snow on the wood...

I did come across sparks on wood I knew was hedge (saw the tree before downing it) on another property. Strange, I know. Wonder if it's possible for the densest of wood to cause excessive heat friction/ablate the chain?

Unless the EAB's are that tough when chilled.

Last edited by artinall; 12-29-2017 at 09:20 PM.
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Old 12-29-2017, 09:22 PM   #4
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Re: Saw-Chain Dulling Far Too Soon


Isn't hedge Osage wood ? Indians made bows out them. I dunno, I've cut harder exotic woods with my chop saw and never saw sparks.

Is the stuff petrified maybe?
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Old 12-29-2017, 09:27 PM   #5
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Re: Saw-Chain Dulling Far Too Soon


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Isn't hedge Osage wood ? Indians made bows out them. I dunno, I've cut harder exotic woods with my chop saw and never saw sparks.

Is the stuff petrified maybe?
Not that I'm aware.
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Old 12-29-2017, 09:44 PM   #6
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Re: Saw-Chain Dulling Far Too Soon


Chain got to hot and you lost the temper.
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Old 12-29-2017, 09:56 PM   #7
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Re: Saw-Chain Dulling Far Too Soon


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Chain got to hot and you lost the temper.
So if it is re-sharpened, doesn't matter. Will dull again quick.
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Old 12-29-2017, 10:27 PM   #8
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Re: Saw-Chain Dulling Far Too Soon


Can't say I've ever gotten a chain hot enough to lose its temper, but I guess it's conceivable. Especially if it's not oiling well.

If you're throwing sparks, it's because of a foreign substance embedded in the wood. Outside of nails or screws, that could be dirt and small stones drawn upward by the trunk as it grows. Not usually a problem more than 2-3' from the ground.
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Old 12-29-2017, 10:41 PM   #9
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Re: Saw-Chain Dulling Far Too Soon


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So if it is re-sharpened, doesn't matter. Will dull again quick.
Yes. Any discoloration of the teeth?
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Old 12-29-2017, 11:07 PM   #10
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Re: Saw-Chain Dulling Far Too Soon


Osage Orange will definitely throw sparks.
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Old 12-29-2017, 11:11 PM   #11
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Re: Saw-Chain Dulling Far Too Soon


When a chain gets overheated (which is rare unless the self-oiler isn't working) it will start to visably smoke and most often it will shrink and tighten around the bar and freeze up. And often the bar will show signs of heat scorch before the teeth show blueing.

another think to check...pull off the clutch cover and make sure the chain isn't hitting up against the internal parts where the clutch, weights, drive gear and needle bearings are.

Last edited by kirkdc; 12-29-2017 at 11:20 PM.
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Old 12-29-2017, 11:14 PM   #12
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Re: Saw-Chain Dulling Far Too Soon


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Osage Orange will definitely throw sparks.
Wow, I never heard that before. I didn't think Osage was all that hard as I've cut harder woods and never witnessed sparks flying. When Osage burns it'll throw sparks form combustion, terribly, and it burns super hot but I never knew it throws sparks when cutting it.

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Old 12-29-2017, 11:44 PM   #13
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Re: Saw-Chain Dulling Far Too Soon


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Originally Posted by kirkdc View Post
Wow, I never heard that before. I didn't think Osage was all that hard as I've cut harder woods and never witnessed sparks flying. When Osage burns it'll throw sparks form combustion, terribly, and it burns super hot but I never knew it throws sparks when cutting it.
http://www.wood-database.com/osage-orange/


It will when it's dried out for a few years, as will locust.
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Old 12-30-2017, 05:59 AM   #14
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Re: Saw-Chain Dulling Far Too Soon


Quote:
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Osage Orange will definitely throw sparks.
Quote:
Originally Posted by Railman View Post
http://www.wood-database.com/osage-orange/


It will when it's dried out for a few years, as will locust.
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Old 12-30-2017, 09:06 AM   #15
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Re: Saw-Chain Dulling Far Too Soon


oil
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Old 12-30-2017, 10:18 AM   #16
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Re: Saw-Chain Dulling Far Too Soon


Quote:
Originally Posted by kirkdc View Post
When a chain gets overheated (which is rare unless the self-oiler isn't working) it will start to visably smoke and most often it will shrink and tighten around the bar and freeze up. And often the bar will show signs of heat scorch before the teeth show blueing...
Quote:
Originally Posted by Leo G View Post
Yes. Any discoloration of the teeth?
Teeth look normal. Might be slight amount around bar, have a look. That considered scorch?


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Originally Posted by parkers5150 View Post
oil
Been kept loaded with bar oil, careful of that.



Will have to say, that orange cast of osage/hedgewood looks familiar:
http://www.osageorange.com/osage_orange_s.html
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Last edited by artinall; 12-30-2017 at 10:22 AM.
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Old 12-30-2017, 11:02 AM   #17
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Re: Saw-Chain Dulling Far Too Soon


Frozen wood will dull chains faster. High mineral content woods will dull a chain faster. Trees that have been laying on the ground for a while build up grit on the surface that will dull a chain faster.

Sharpening angles are different for summer softwood vs frozen hardwood.

Regarding sparks, my first guess is you're running summer weight bar oil in the winter, and you're cutting through grit.
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Old 12-30-2017, 11:03 AM   #18
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Re: Saw-Chain Dulling Far Too Soon


Ash is called ash because It's high mineral content (ash).
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Old 12-30-2017, 11:06 AM   #19
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Re: Saw-Chain Dulling Far Too Soon


If that photo shows your normal chain tension, you're running it too loose.
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Old 12-30-2017, 11:21 AM   #20
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Re: Saw-Chain Dulling Far Too Soon


How are you filing the gage teeth (sometimes called raker teeth)?

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