Dull Chain Thread...

[Wilhelm]

Ok guys this should fall inline with the thread topic here I hope. I have a new to me grinder I purchased from another member here that worked fine for them I have no doubt. Only difference is they were using a CBN wheel on it where im using an Oregon.

The grinder is an Oregon model #108181. I’ve dressed 2 wheels for the .325 and 3/8 per the little orange guide that comes with the grinder. Ground the chains then checked the rakers. Angle is set to 30. The motor head arm is fixed position and do not know what it is.

I ground three chains and all looked good but once you put them in the wood they wont cut and will actually start smoking. Im doing something majorly wrong.

I can file them sharp by hand no problem but this grinding thing is new to me any help would be appreciated.

What Philbert said.
There seems to be next to no beak on those cutters.

 

[Philbert]

The key 'trick' to sharpening is to know what you want your cutters to look like when finished. To sharpen with 'intent'.

Guys who just pass a file over a cutter, or use a file guide, or use a grinder, might be removing metal, but not necessarily be sharpening the cutting edges, or not know when they are finished.

Once you know what you want to achieve, you should be able to sharpen with any method: free hand file, file guide, grinder, Dremel, frozen ferret dipped in sand, etc. Although, as a practical matter, you will develop more skill, and a preference, for certain methods over others.

So, if you know what you want a filed cutter to look like when sharp, you should be able to achieve similar results with a grinder. Guys who are accustomed to 'just taking 3 strokes with the file' without really looking at what they are doing have the most trouble, especially, with chains that need more than just a 'touch up'.

Philbert

 

[Wonkydonkey]

In your pic, on the left, it looks a bit blue ?
Other than what Philbert said, have you checked the rakers, ?

 

[Boomhower]

In your pic, on the left, it looks a bit blue ?
Other than what Philbert said, have you checked the rakers, ?

View attachment 255365

Yes sir, checked and filled.


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[Boomhower]

440 chain cuts decent

Here is an 036 cuts like crap and smoked

Now both chains I did at the same time same wheel but im sure I messed up the adjustments at this point. I think if I raise the wheel up I might be in the money?

 

[huskihl]

440 chain cuts decent

Here is an 036 cuts like crap and smoked

Now both chains I did at the same time same wheel but im sure I messed up the adjustments at this point. I think if I raise the wheel up I might be in the money?

And take five swipes off the rakers

 

[Philbert]

Here is an 036 cuts like crap and smoked. Now both chains I did at the same time same wheel but im sure I messed up the adjustments at this point. I think if I raise the wheel up I might be in the money?

Try it. Experiment. See what works for you. That chain looks dirty, and the top edge looks pretty dull.

Take some 'scrap chains', if you have them, and 'play' with the grinder. See what small changes in grinder setting do the cutter shape and edges; use a magnifying glass, if that helps. Take a filed chain that you like, or even a new loop, and try to 'match' those profiles. You may find that some 'non-standard' setting ('31.5°', or 27°, etc.) work best for you. You may even find that your R and L cutter are slightly different, and that you may need to make slight adjustments in the cutter length, and angle, settings, when switching from side to side.

Philbert

 

[Wonkydonkey]

I,m no expert, but your top pic has slightly more hook in it compared to your bottom pic, that's my next observation other than I what I said before about rakers not even touched. have you checked them.

you could try many things to get you where you want but it’s your road to learning and you have to train your eye to spot the different is between the chains

I bet there’s more than one key difference As to why, and more than one way to reach the goal. Ie 60% cutters 40% rakers or the orther way round


btw. I'm still a novice filer and I know when I get the sharp chain cutting, it’s just keeping it cutting like that is the difficult part. I know I want but somttimes

 

[Boomhower]

Im preparing in case one of these hurricanes hits us so I had to rush these today. I ran the file over em and freshened them up. They cut decent now.

I will get focused on em later next week. Yall have a good weekend.


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[Al Smith]

I know nothing about a grinder .The only one I use is a Dremel stone for a badly damaged cutter .However the side plate is what does the cutting and the top plate lifts the chip .The two should converge on what they call the working corner .Too high or too low by much it will not be optimum .

 

[Wolverine]

Someone say dull chain?

 

[Deets066]

Someone say dull chain?
View attachment 255991

Just turn it around and cut with the backside for a while.