Chatter in dry hard eucalyptus (Oz wood thread)

[davidwyby]

I forgot to note that with the 395 and the semi-chisel, I had to give it way too much feed pressure to keep the saw from over revving.

 

[davidwyby]

 

[davidwyby]

This afternoon went well. Full skip for the win on the 395. 4-5 cuts, one tank of gas, and dull. Should have sharpened before the last cut. Chatter seems to be related to cutting with the nose buried.


I dare say that 6100 might be faster than the 2166 and 395 in 20”. @Mastermind what do they tach in the cut? I keep forgetting to check. It dragged the 24” with authority tonight after I fixed the chain.


395 before : (looks like I didn’t roll the file on that tooth or something, not perfect)

6100 after it’s snack.

395 after.







I took two other vids of the 395 in bigger wood, but the wood was rotten and dusty, no good. The 395 ( and 2166) feel kinda slow and tractor like compared to the 6100.

 

[davidwyby]

Port all the saws...

 

[Mastermind]

@Mastermind what do they tach in the cut?

Depends on load. 11500 ain't out of the realm of possibility.....

 

[davidwyby]

Cheow. No wonder it cuts fast

 

[Socalmisfit]

The 6100 chain looks nice and clean the 395 still has that red gum stuck to it. Would be nice to see if the husky is spitting more or less oil than the 6100 might be the difference.

 

[davidwyby]

The 6100 chain looks nice and clean the 395 still has that red gum stuck to it. Would be nice to see if the husky is spitting more or less oil than the 6100 might be the difference.

All the cutter pics are 395. Before and after.

 

[Redfin]

This afternoon went well. Full skip for the win on the 395. 4-5 cuts, one tank of gas, and dull. Should have sharpened before the last cut. Chatter seems to be related to cutting with the nose buried.


I dare say that 6100 might be faster than the 2166 and 395 in 20”. @Mastermind what do they tach in the cut? I keep forgetting to check. It dragged the 24” with authority tonight after I fixed the chain.


395 before : (looks like I didn’t roll the file on that tooth or something, not perfect)

6100 after it’s snack.

395 after.




View attachment 280163 View attachment 280164 View attachment 280165 View attachment 280166


I took two other vids of the 395 in bigger wood, but the wood was rotten and dusty, no good. The 395 ( and 2166) feel kinda slow and tractor like compared to the 6100.

Pics look like you are filing the top and then the gullet? What size file are you using?

 

[davidwyby]

That was the first filing on that chain. I think it was 4 swipes until the existing radius matched my 7/32” file and cleaned up. That left a little material in the gullet I then cleaned out with about 2 strokes IIRC. I was in a hurry to cut before sundown.


I freehanded it using the bare part of the file to pick up the existing angles.

 

[davidwyby]

Guys, does increased chain speed dull chains faster?
Thanks


@Benwa

 

[Wilhelm]

In my limited experience, YES!

 

[Rogee]

Sorry, Eucalyptus. Mouthful to say or type. Then again, my phone has predictive text if I’d use it...

If it's been down for 5 years or so it's even harder to cut . Dry and hard and will blunten a chain in no time . The snd best firewood though

 

[Bjorn]

If it's been down for 5 years or so it's even harder to cut . Dry and hard and will blunten a chain in no time . The snd best firewood though

Dynamite helps

 

[deye223]

It's all I cut just use semi chisel

 

[Bob95065]

I cut and burn eucalyptus up here in Felton. We have lots of blue gum here in Santa Cruz County. I try and split it within two weeks of cutting it. If it is dry it's like splitting concrete. I've stalled my splitter on dry eucalyptus.

I'm not sure what you can do about chain chatter if it is that dry. Post what you've learned and thanks in advance.

 

[Benwa]

Guys, does increased chain speed dull chains faster?
Thanks


@Benwa

In my limited experience, YES!

Can anyone elaborate on this? Other than "it just does?" Not trying to sound like an ass, this is something we've been discussing lately. I'm truly interested in reasoning/logic behind it, &/or why it would dull quicker at a faster speed............ heat?.......... or the pure fact that at a higher speed it's chewing through MORE wood in a given amount of time?.......Thanks for any input guys.

 

[Wilhelm]

A slower moving chain has more time to take and keep a bite in hard wood.
A fast moving chain will "slip" over the grain rather than take a proper bite.
A slow chain will pull a continuous wood chip in hardwoods, a fast chain will chatter resulting in an interrupted cutting performance.

I mostly buck turkey oak, it is a dense and hard wood species - I prefer a moderate chain speed.
Even in hardwoods I prefer full chisel chains.

For comparison, beech is butter soft compared to turkey oak.

 

[Wilhelm]

I'm truly interested in reasoning/logic behind it, &/or why it would dull quicker at a faster speed............ heat?.......... or the pure fact that at a higher speed it's chewing through MORE wood in a given amount of time?

Take a butchers knife and smash it continuously into a bunch of meat, it will take a long time to get dull.
Take the same butchers knife and smash it into an aluminum block, it will dull noticeably faster.

Both the meat and the aluminum are softer than steel, but they'll dull the steel at a different pace.

The difference in hardness and density of different wood species will result in unequal chain dulling.

Well, that's my theory regarding this particular topic!
I may be looking at it the wrong way, but I am fairly certain that I am not.

Cheers

 

[davidwyby]

@Benwa chatter definitely trashes cutters while machining...hmm...