Bar on fire...

[r1stgei]

Hey guys! Quick question... put a carbide chain on my 20"bar. Bar was pretty much new... cut thru a few old uprooted stumps laying around that I'm trying to clean around the place.

Made about 4-5 cuts... oiler was working just fine. Noticed that the bar was smoking hot afterwards and developed a hot spot underneath.

Any ideas on this? Yes it's old dirty wood ... carbide chain took a beating too...


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[r1stgei]

Hey guys! Quick question... put a carbide chain on my 20"bar. Bar was pretty much new... cut thru a few old uprooted stumps laying around that I'm trying to clean around the place.

Made about 4-5 cuts... oiler was working just fine. Noticed that the bar was smoking hot afterwards and developed a hot spot underneath.

Any ideas on this? Yes it's old dirty wood ... carbide chain took a beating too... View attachment 596072View attachment 596073


Sent from my iPhone using Tapatalk

Sent from my iPhone using Tapatalk

 

[Philbert]

Carbide teeth cut slower than teeth on conventional chain. If you were trying to cut at the speed that you are used to, you may have been leaning on it a bit more than you realize. Or, maybe it being 'old dirty wood'?

Philbert

 

[s sidewall]

Turn oiler all the way up.

Steve Sidwell, Samsung On5 using Tapatalk

 

[Jtheo]

Lack of oil on the bar.

 

[HarleyT]

Well, the hot spot is probably the spot that is in the wood. Not on fire, just taking some paint off.
If it was lack of oil, other things would happen.

 

[s sidewall]

Looks like it did, over heated the bar, no or lack of oil equals friction with means heat.

Steve Sidwell, Samsung On5 using Tapatalk

 

[HarleyT]

Why didn't the sprocket nose burn up and seize?

 

[Khntr85]

May want to pop sprocket off and make sure nothing got real hot....

Got a lot of saws in the dead pile that are fried on the pto side...

 

[stihl sawing]

You're good, you mighta heated it up a little. dirty wood and a dull chain will spin faster creating more friction and heat. The bar may need dressing up. it has probably mushroomed in that spot. but it's still good. I've done a few bars that way over the years. a dull chain does more damage to other parts than people think. I doubt it caught on fire, I've seen a lot worse that didn't.

 

[Jtheo]

Why didn't the sprocket nose burn up and seize?

Most likely because of the grease around the sprocket.

I grease all of mine after use. Might be overkill, but grease is cheap.

 

[teacherman]

Bar looks a little less new now, make sure it is not grooved. I have old bars for each size saw, specifically dedicated for stumps and nasty dirty wood. Generally pick a saw that oils copiously, like one 038 in particular I have. Newer saws tend to oil less due to EPA guidelines. You don't use waste oil for bar oil, do you? That is an actual sin, which means in the after life you only get to use a Poulan Wild Thing, or worse, the legendary "Power Horse" sold at Northern Tool.

 

[teacherman]

If you have an 041 or 041 Super, they tend to liberally anoint the bar, chain, clutch cover, the operator's leg, and everything else withing flinging distance of the bar tip.

 

[Jtheo]

If you have an 041 or 041 Super, they tend to liberally anoint the bar, chain, clutch cover, the operator's leg, and everything else withing flinging distance of the bar tip.

That's what I like to see. A 372XP will also actually oil the bar.