Sharpening (square bottom)

[AaronB]

I looked for a sharpening area but couldn't find it so I thought I would just ask my question here since this is were I always visit.

I have only sharpened milling chains but now I need to sharpen some regular chains but the chain has a square cut on the inside where all the milling chains have a rounded (to match grinding wheel) at the bottom. See picture for the chain I am referring to.

Do I just need to blow away the square bottom and just make it rounded like all the other chains?
Thanks for any help

 

[pops21]

That is a square chisel chain. You can either find a shop around you to resharpen it or file it to a round chisel chain. Square chisel chain cuts faster in clean wood then round chisel chain. It is said because of the agressive profile they dull a little faster but cut around 10% faster. They make jigs to refile it to square but are expensive. Also hand filing is another if you want to keep it square. There are threads on arborist site talking about hand filing if your interested. Its done with special files.

 

[AaronB]

I have a shop close by, maybe I will take these two chains to them this first time, maybe they will turn it into a round chisel themselves for me, then I can sharpen it from then on out. If they keep it square so be it, think they only charge $5 and I only have 2 to get done right now.

Thanks for the help, at least I know I can turn it into a round chisel myself if I want.

 

[mdavlee]

Square can be sharpened with double bevel files from baileys. You can file it round now that it's dull if you want it to be round filed. Depending on how it's sharpened it can be as much as 25% faster than round and will last just as long as round full chisel chain.

 

[gemniii]

I looked for a sharpening area but couldn't find it so I thought I would just ask my question here since this is were I always visit.

I have only sharpened milling chains but now I need to sharpen some regular chains but the chain has a square cut on the inside where all the milling chains have a rounded (to match grinding wheel) at the bottom. See picture for the chain I am referring to.

Do I just need to blow away the square bottom and just make it rounded like all the other chains?
Thanks for any help

You didn't know the secret handshake?

http://www.arboristsite.com/chain-sharpening/

They keep it hidden under hot saws