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Self feeding issues

Hedgerow

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The jury is still out here on grinders but I have seen many ruined chains caused by grinders (chop saw types). I even had to resharpen a new Stihl chain the other day where the gullets were a mess and this was on brand new saw. It took a while to hand sharpen to clean up the chain. It probably poorly setup and poorly trained sharpers but it still looks bad to me.

So far I only used a grinder on severely rocked chains or ones that have been overheated by someone using a grinder before the chain came into my shop.
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Skeans1

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I don’t round my wheel at all, I keep a square corner on it specs on the grinder are 60 degrees on the head, 35 on the vise and 10 to the side.
For rakers I use a separate grinder but it’s 60 on the head 0 and 0 on the vise, as well as a wheel that’s parallel to the vise for a grind the wheel is the large 11H or 3/4” chain wheel.


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junkman

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Well I won't be able to try it out today but here is the end results. I went with kevin's angles. Thank you for everyone's suggestions. View attachment 159405
Adam, you are closer but still off some ,see the little laser scribe ? The round part of the side cutter should be same angle as it to cut right and not be a grabby chain ,i need to see top of cutter also to see if it is spooned out ,if it has a rounded top it will not self feed till you grind it away to good metal for a working corner.
 

junkman

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I don’t round my wheel at all, I keep a square corner on it specs on the grinder are 60 degrees on the head, 35 on the vise and 10 to the side.
For rakers I use a separate grinder but it’s 60 on the head 0 and 0 on the vise, as well as a wheel that’s parallel to the vise for a grind the wheel is the large 11H or 3/4” chain wheel.


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That looks like prosseser chain.
 

junkman

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It is, but a lot of the same ideas cross over between the two especially with it being full chisel 404.
chain-types.jpg



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By the outer corner it looks like semi chisel ? Looks more round to me ,not so pointy .full chisel bit seems like would go dull quick on a prosesser bar ? Could be the grind or picture angle though too.
 

Toad22t

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Adam, you are closer but still off some ,see the little laser scribe ? The round part of the side cutter should be same angle as it to cut right and not be a grabby chain ,i need to see top of cutter also to see if it is spooned out ,if it has a rounded top it will not self feed till you grind it away to good metal for a working corner.

Thank you Brian, I'll try to get more pics tonight after work.
 

junkman

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Thank you Brian, I'll try to get more pics tonight after work.
Here are some angles i use for different things i will try to explain what i have found trial and error ,and what works for me in pacific nw wood ,
A good all around ,dirty wood / firewood setup i use looks like this ,use less top plate maybe 20 degrees ,and less hook ,about where the laser scribe is .Less hook and top plate makes the outer corner stronger ,which lasts longer in dirty wood
KIMG3375.JPG KIMG3376.JPG KIMG3377.JPG
If the wood is clean ,like falling trees that have not been drug yet you can speed the chain up some by doing a 30 degree top plate like the laser scribe is ,and add a little more hook than the laser scribe on the side shows ,my .404 off the roll rsc stihl looks similar to this ,more top plate and hook will take more power to pull so you can actually tune your chain to the saw once you understand how angles change how the chain works ,like i said these are 2 angles that work for what i cut and may not be ideal for other woods ,all you can do is try different stuff till find what works for you ,i use the round for clearing land and firewood for ease of sharpening in the field ,if doing felling only i will run chisel bit (square ground) If you get one of these file guides from oregon they make sharpening real easy ,it keeps the file from dropping too far into the gullet ,to properly sharpen part of the file should be above the top plate ,same with the grinding wheel on a grinder ,rookie mistake is to drop too far down when sharpening and ending up with too much hook ,sorry for the book i wrote ,but it bugs me when people on the forums dont explain why something works ,KIMG3473.JPG KIMG3475.JPG
 

RI Chevy

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I use the same type of guide Brian. Is PNW wood hard or soft?
 
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