Dull chains...does it really kill saws....how?

[danimal]

Hey Dub11...is that a modern day scottish claymore in yer avitar?

 

[MustangMike]

There is a difference between a rocked chain that forces itself out of the cut (like above), and and dull chain that the operator can dog in.

 

[malk315]

There is a difference between a rocked chain that forces itself out of the cut (like above), and and dull chain that the operator can dog in.

I have experienced a really bad chain that forces out... ugly!
Same w/ dull chain that you can try and dog to get it through something...

Only time I cut w/ dull chain is when I've hit metal or something already and need to simply finish the part that has the metal or other crap so the cut can be finished -- especially if it's a big round that we really need cut through. If you move over you may just hit the metal again -- finish the cut and next cut further up the log is hopefully not riddled with metal agian.

Then pickup another saw and finish and at break time file the dull chain or put another chain on and file everything at home on the bench for the next outing.

I absolutely hate cutting with dull chain. I think that when you dog and put a lot of pressure on a dull chain to force it through the wood, you can put wear on not only the clutch and heat transfer into the saw and zorching the bar etc. but you can also put wear on anti-vibe mounts since you are really putting a lot pressure there and could maybe break spring ones or tear rubber ones etc...

To me it makes not sense to cut with dull chain -- so much more fun to cut with a razor sharp chain. Put a smile on my face and saw will clearly do best and last a long time pulling sharp chain.

 

[junkman]

If you keep running the saw with the chain dull ,I will kick you in the shin for being a *pretty boy.
Why Is DumbA$$ sensored ?

 

[Lone Wolf]

Mike, that is an interesting suggestion about the infra red gun.... But I would still contend that its easier for a saw to pull a dull chain... hence the higher rpm.

The saw is not alone it has a person attached to it henceforth it needs to be pushed harder to compensate for the dull chain! That produces more heat period! I know for a fact!

 

[DSS]

If you keep running the saw with the chain dull ,I will kick you in the shin for being a *pretty boy.
Why Is DumbA$$ sensored ?

No *FireTrucking idea

 

[Philbert]

But I would still contend that its easier for a saw to pull a dull chain... hence the higher rpm.

I'd definitely buy that an engine works harder by pulling a sharp chain through wood... hence the bog.

Disagree. Look at the chips. A sharp chain will cut through the wood fibers; a dull chain will try to tear them, in addition to the friction created by rubbing past the wood with the rounded edges. I think that someone may have already suggested trying this with a kitchen knife to see how much force it takes you to cut through a piece of meat with a sharp and dull knife.

I . . .was shocked by some of the experienced climbers ability to look like they were "filing" but rarely got the chain "sharp" ...it would cut but not what I could produce with a grinder...and I stink.

'Filing' does not automatically equal 'sharp'! I see a lot of guys who think that if they pass the file by the cutters x times, the chain is sharper. They may have made it worse. If they understand how a cutter works, and what they are trying to accomplish, then they can make a chain sharper using a file, grinder, Dremel, etc.

I think this is probably more common than we'd imagine.

He gets that he is supposed to round over the depth gauge, not the cutter, right?

Philbert

 

[Wolverine]

He gets that he is supposed to round over the depth gauge, not the cutter, right?

That was a saw I bought off craigs to flip, not one of my arborist buds.

 

[TJ the Chainsaw Mechanic]

Running a dull chain with bar oil in the tank is like running a sharp chain with old nasty motor oil in the tank. OK, Not Exactly the same but I had to say Something different!

For the rest....Yeah....what they said.

 

[WooHoo223]

Has anyone taken the temperature of bar and surrounding area where it mates to tank and case area after use? I wonder if the bar adds heat to area or if the bar acts like a heatsink to absorb heat to cool the saw. Either way a hot bar and chain can't help keeping the engine cool.

 

[jakethesnake]

I've personally warped a bar .... I'm pretty sure that helped make the engine hot. Most of the time I'd say it helps cool it if all things are going well.

 

[Dub11]

Hey Dub11...is that a modern day scottish claymore in yer avitar?

THERE CAN ONLY BE ONE!

 

[WooHoo223]

I would think the bar would act as a heatsink. I have never noticed bar oil boiling while cutting but I have not ever used a thermometer on a saw to follow the path of heat. Ha, short bars kill saws. Ok not really, just a excuse to run heavy bars.

 

[Dub11]

So looking at this husky 254 Iam now thinking maybe it was a victim of dull chain excise heat? What do you guys think seeing bubbled paint around clutch side bearing?

 

[mdavlee]

That 254 got hot. When milling bar oil boiling is common. With a dull chain trying to mill a long cut is brutal for everyone involved. I've stopped mid cut and filed if I have to push with much over the weight of my arm resting on the mill.

 

[Redfin]

Yikes look at the bottom of the con rod.

 

[RIDE-RED 350r]

may as well put the chain in the dirt to touch it up

I've seen those before... Still trying to figure out the mechanics of it. Was always skeptical, and now my skepticism is confirmed! LOL!

 

[Philbert]

I've seen those before... Still trying to figure out the mechanics of it. Was always skeptical, and now my skepticism is confirmed!

Why?

Tried it?

Bevel sharpens on the top of the cutter. Cuts more aggressively than many other 3/8 low profile chains side-by-side. See photos in the PowerSharp thread.

http://opeforum.com/threads/powersharp-chains.5620/

Philbert

 

[RIDE-RED 350r]

Why?

Tried it?

Bevel sharpens on the top of the cutter. Cuts more aggressively than many other 3/8 low profile chains side-by-side. See photos in the PowerSharp thread.

http://opeforum.com/threads/powersharp-chains.5620/

Philbert

Well, I made that statement never seeing one used before and based on the vid posted by Brewz. That vid doesn't make a strong case in favor of them for me.. It wasn't till after I commented that I saw the link to your thread where you went into more depth. So here we are now, and maybe it's not as bad as that vid depicts for it's intended purpose.

 

[Dub11]

Yikes look at the bottom of the con rod.

I'll just run some 20-50 it the crank
case quite right up