'21' on the chain question...

1/4” chain uses 1/8” files
1/8" (3.2 mm) Round Files for Stihl MS150 1/4" PM3 Chain, (12-Pack) 168-6-3.2-1P | eBay

 

Holy cow. Came back and a virtual encyclopedia of replies.

To answer one... there is no other identifying stamp on the chain other than '21'. As said, it is an offbrand no name knockoff. I recall looking it up like 4 years ago based on the info on the box, long gone, and it appears to have been made for England, but marketed for 5 minutes in the US. Nothing on the saw itself. It is definitely underpowered but danged if it doesn't cut like a sum-b¡tch. Have ground through many silver maple rounds, some 30" or more.

Anyway, I am amazed at all the responses. I will see about photographing the chain itself, but there is little to glean. I tried to sharpen it with a chain saw chain grinder that I have used for years with other chains and I mangled the sh!t out of it. My fault. I am way better than that. But on familiar. I can make my skip chains for the Stihls pristine. This one, goes to show how being off just a little can throw a wrench in the werks.

Will re-review all the posts and if there is anything more to glean from the chain, will post a pic. I don't think so.

Fantastic thread, this.

 

I learned more reading this thread than I have like pretty much ever... and I have been doing this for years.

 

Need...
chain....
pics.......

 

Thanks. The 150t has 1/4” and the Stihl electric pole saw I use has 1/4”. A 5/32 butchers that chain.

 

Hang around for a while and be amazed at the stuff you'll learn. I certainly have!

 

huskihl is correct. If it is in fact Oregon brand chain it is .325 .58 gauge. That particular chain calls for a 3/16” file.

 

Pic of chain. Now that I have looked at it... Zhuang chain. Stamped onto the links. And '21'. It is a 24" inch chain, but here is a link that drilled down into more info. As have said, I have been amazed at how durable the two chains that came with the saw have been. And the saw. Found a link that identifies the saw too.



Here is the saw that came with the two 24" chains.

The (SURPRISINGLY GOOD) TIMBERPRO 62cc 20 inch gas chainsaw

Purchased 3+ years ago. Cheap-o. But keeps running. Used to cut thru large rounds.

Chain pic

 

I'm late to the party here.
Go over the bar and sprocket with a magnifying glass to see if the parts are stamped with the pitch.

 

In earlier posts, we assumed that because it had a 21 on it that it was an Oregon chain. It’s obviously not, so that info should be thrown out. But still, pitch usually determines the file size. Measure the distance between any 3 rivets and divide by 2. Or if all you have is a tape measure, measure the distance between say.... 11 rivets and divide by 10. If your answer is around .325, you need a 3/16 file

 

Not that anyone was waiting by the fire for me to respond. But... ended up with a Pferd 3/16th and yes, it appears to be the correct fit. Will be able to give this a go in a couple of days. Going to be below 0 here in Colorado front range for a couple of days... Woodstock wood stove humming along...

 

Glad to hear you figured it out & it’s working. Keep that stove a blazing!!!!!