.325" square

[Stihlbro]

So is it square or round? What am I dealing with here? "Round full chisel"? "semi-square"? I am genuinely curious as I'm not very knowledgeable on chain. I do know a 3/16 round file doesn't fit it very well.

I know exactly what you are talking about. The pictures show it.

 

[Cut4fun]

View attachment 10850

With studying the profile of the cutters, I see something I like.

Anyone else?

You talking what we used to look for on the older 72?

For that other question R??? I have had that grind on a few NIB chains in X grind.

 

[Stihlbro]

Well, I guess it is called the x grind. Something going on there that is a cross between round/square cutter.

 

[Philbert]

Really hard to see on a phone. Cutters in the first photo look the same?

Philbert

 

[Cut4fun]

Like to see how the machine and the process they are doing to hit those cutters like that.

 

[Cut4fun]

They call it Enhanced Grind https://www.oregonproducts.com/pdfs/20LPX_107028-AB_low-res.pdf

"X" grind - Enhanced grind geometry significantly improvies out-of-box sharpness with substantial speed improvement in boring and bias (undercut) modes https://www.oregonproducts.com/pro/products/chain/20_21_22LPSuper20.htm

 

[Philbert]

Like to see how the machine and the process they are doing to hit those cutters like that.

Remember, they are not sitting at a 511A. They grind them before they are assembled into the chain, using custom, CNC-type equipment that probably cost more than many of our houses. To duplicate it, you might need to work out a multi-pass process.

Wet grinding is not practical (IMHO) for assembled chains in use, but there are a range of grinding wheels that can be used, to provide finer, smoother, more polished cutters. Most users are not willing to go to this level of detail and attention - they just want something that cuts good enough.

Philbert

http://www.tecomec.com/subcategory/chain_saw_accessories_accessories_for_chain_grinders/index.htm

 

[Cut4fun]

I've put different profiles on wheels and even did different set up on my USG. Got it to look like it but not near the cut. Was off on the side still.

 

[Sierrawoodsman]

X-grind close up.

Sent from my iPhone using Tapatalk

 

[Sierrawoodsman]

New angles .325" Stihl RSC
Will test tomorrow to see if it holds up.

Sent from my iPhone using Tapatalk[/IMG]

 

[Cut4fun]

X-grind close up.

Sent from my iPhone using Tapatalk

How the heck you get pics like that?

 

[psuiewalsh]

I was wondering the same thing. My dumb phone wont even take a pic you can see the angles on.

 

[Wolverine]

How the heck you get pics like that?

@Sierrawoodsman please do tell how you produce such good pics. I've been wanting to get similar results to share and get critique but I struggle to capture my results.

 

[Sierrawoodsman]

.325" Chip channel comparison
Carlton (left), Oregon LPX (middle), Stihl RSC (Right)

 

[Sierrawoodsman]

I wish I could take the credit Guys, but It's all in the Camera.
It's got a "Super Macro" mode that will get you real nice close-ups
I have to older version of this one:
http://www.amazon.com/dp/B00TYJCW36/ref=sr_ob_1?ie=UTF8&qid=1455469244&sr=8-1

The new version has Wi-Fi Capabilty w/same optics @ same price.
I reciently Got a new I-phone that is supposed to have a great camera.
I have a hard time getting decent close up shot's out of it.

Edit: Not the Same Price: The SH-50 (older model I use)
Price has dropped to $130. I think I paid $230 a few years ago
http://www.amazon.com/Olympus-Stylu...?ie=UTF8&qid=1455472727&sr=8-2&keywords=sh-50

 

[Sierrawoodsman]

When you get good close-up photo's you see things you never noticed before.
here's 1 more shot I found interesting. Never before realized the
Rakers are not only different sizes and shapes, but are also "off-set" differently with each Manfacture.
Stihl and Carlton both bent the raker toward the outside of cutter.
Lpx Is more centered in the cutter.

 

[concretegrazer]

That's some fine grinding. Nice pics.

 

[Sierrawoodsman]

Thanks man.


Sent from my iPhone using Tapatalk

 

[OldJack]

Those are good pics. I've been trying chain photography myself and I learned one thing today. Sharpen the chain! I had a 20BPX beside a 20LPX and the 20BPX was new with only 3 cuts on green poplar last summer. It didn't even take the bluing off the cutter so I had a black cutter along side a shiny 20LPX cutter. There was no real way to compare them.

 

[Cut4fun]

.325" Chip channel comparison
Carlton (left), Oregon LPX (middle), Stihl RSC (Right)

You going to do up all 3 for the chain build off?