which diameter chainsaw file ?

**damian** · 20th May 2018, 10:48 PM

Hi all,

Not sure if this is the right place.

My chainsaw file has disappeared so I need to buy a new one.

The saw is a chinese ebay special, 62cc 20" bar. The bar is a BE20-76-5812P

So I'm pretty sure it's a 3/8 pitch (although it measured 17mm across 3 rivets) .058 gauge with 76 drive teeth.

But I can't find anything anywhere on how to pick the right size file to recut the teeth. I held some up against it and the 4 mm seems to be the one, but is there a "proper" way to measure it ?

This is my second ebay saw. The first one got stolen. I loved it and never thought I'd get another as good but this one is great also. Starts easily, idles reliably and when the chain is sharp it cuts really well. $99...seriously...

**BobL** · 20th May 2018, 11:44 PM

There's no proper way - you can, in principle, use any file size you like.

4mm or 5/32" sounds like a good place to start.

**Robson Valley** · 21st May 2018, 05:17 PM

Paint the bevel with black felt marker. With the file that you have, make one pass, no more than 2, and see how evenly the blacking has been removed.

**orraloon** · 22nd May 2018, 11:59 AM

For a 20'' saw it's likely 3/16 (4.8mm). Smaller saws like 12 to 14'' usually use the 5/32 file. Best way to be sure is ask at the local chainsaw service place.
Regards
John

**dinosour** · 22nd May 2018, 12:24 PM

Don,t forget to wipe each tooth with a rag to remove oil before sharpening and rub your file with a stick of chalk. I do this and my files last for years, sometimes out last the chain.

**damian** · 22nd May 2018, 08:15 PM

Thank you for the replies.

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