Chain grinding and filing thread

[brshephard]

It's like a hybrid. You get a round filed side plate with a square filed top and corner. Faster than round and supposedly more forgiving than a square file.

 

[Chainsaw Jim]

Whata the double bevel flat file look like. Could you post a pic?

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Here's a couple good brands with a Chinese cheapo on the bottom. They run about $12 each, the pig metal was about $6.50.
I don't have 6 sided or goofy to show.

 

[Chainsaw Jim]

Whats the goofy file for? I see them on ebay too.

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Semi-chisel

 

[brshephard]

Jim which file brand do you get the best life from?

 

[Chainsaw Jim]

Jim which file brand do you get the best life from?

The Portugal ones have lasted longer so far with my learning curve. I've found that all need babied if you want them to last more than one loop if the teeth are beyond a simple touch up. The key to maintaining a good chisel edge is to touch it up more frequently. A 30"or so chain can be touched up by a skilled person in less than 5 minutes.
For very dull or rocked teeth my advice is to have a round file on hand to get the profile in check, which also takes care of the gullet, then you'll have a good angle to follow when finishing it with a chisel file.

 

[jakethesnake]

The Portugal ones have lasted longer so far with my learning curve. I've found that all need babied if you want them to last more than one loop if the teeth are beyond a simple touch up. The key to maintaining a good chisel edge is to touch it up more frequently. A 30"or so chain can be touched up by a skilled person in less than 5 minutes.
For very dull or rocked teeth my advice is to have a round file on hand to get the profile in check, which also takes care of the gullet, then you'll have a good angle to follow when finishing it with a chisel file.

Where you find that Chinese fella at?

 

[Chainsaw Jim]

The local husqvarna shop recently started selling them.

 

[Chainsaw Jim]

That's a Reilly chain, not yours.

I have a feeling John might show up in here real soon, lol.

 

[RI Chevy]

That would be great to have John posting in here.

 

[Fruecrue]

That would be great to have John posting in here.

I concur

 

[Fruecrue]

Cool thread Jim, nice chains too.

 

[Duane(Pa)]

Damn I sure hope not, I'm expecting to get at least 6 cords of dead standing locust cut before the next sharpening.

 

[Armbru84]

Where do you guys get the 6 sided files for square chain and whats a good price? I would like to try.
Do saw dealers carry it?

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definitive Dave has them on his eBay store.

 

[Canadian farm boy]

Here's one of my play chains. Lots of work with round files, 1"cut off wheels and a dremel. Started out as a brand new loop of 72lgx

 

[Chainsaw Jim]

Here's that 1/2" chain I was filing on. I still need to locate a hole for the oiler. The chain is so dry it sounds like the tracks on an old cat. I feel pretty stupid for at least not wetting it with bar oil before spinning it, lol.

 

[Armbru84]

Here's one of my play chains. Lots of work with round files, 1"cut off wheels and a dremel. Started out as a brand new loop of 72lgxView attachment 130025View attachment 130026View attachment 130027View attachment 130028

Looks very nice. I know from exp they cut fast.

 

[Sty57]

Where do you guys get the 6 sided files for square chain and whats a good price? I would like to try.
Do saw dealers carry it?

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My dealer has them on hand at all times, I think the last ones I got were in the $11 range.

 

[Khntr85]

I absolutely LOVE mine !!!

View attachment 129582 View attachment 129583

Haven’t been on for awhile, damn I’d that ain’t a nice grinder!!!!!

 

[Khntr85]

If you have a round chain and a square chain ground in such a way that they both cut the same speed, the square chain will outlast the round.
Round grind is less efficient and requires more aggressive angles to cut the same speed. A good example of this is off the roll RS. Look at how the working corner sticks out unsupported. Now compare that to RSL with no side plate hook and a conservative top plate angle.
They cut roughly the same speed.

So when someone tells you square dulls quicker, it likely does, but they are comparing it to a 7/32 round filed chain that is quite a bit slower.

Here is my work grind
View attachment 129662
Note the underside top plate angle. It's about 20°, real aggressive. It lasts me about as long as factory grind RS.
If I was to cut dirty wood I would relax my angles a bit, if that didn't work I would go straight to semi chisel.

It seems that a lot of you guys that have played with the angles all say that a “work” ground square chain will last the same a a RS....

I dont have a square grinder, but I have done a lot of experimenting with angles in the Oregon and USG grinders....

Knowing what the cutters profiles are, I can see why you guys say this....as you stated, the point on the round ground Chains is “unsupported”....

Dammit, every time I get on here I start trying to convince myself to get a square grinder, LMAO....

 

[J. Loe]

Dammit, every time I get on here I start trying to convince myself to get a square grinder, LMAO....

Totally.