help identifying chain size

My dad gave me a new chain and i was wondering how to figure out what size pitch an gauge. I got the booklet with it but it does not say what size it is.

 

Measure the distance on 3 rivets center-to-center and divide by two...I think. Somebody will confirm. Or just try it on the spur or rim of known pitch that you have.

 

3 links center to center is 1 1/2. so .75. I don't get it

 

Sorry, I should have wrote rivets.

 

The 3 on the cutter denotes that its 3/8 or .375
Looks like full chisel by the square outside side to top corner
Looks like 1 tie strap between cutters, so its not semi skip and not full skip
Only question is what is the drive tang thickness ?
If you flip the chain over to the other side and look at the driver ..............
3 = .050
5= .058
6= .063


So you have 3/8 RS ............. need a drive link count for length, and the number on the other side of the driver for what thickness the bar will need to be

 

Shoot was hoping it was .325

 

Sorry bud, the cutter would have a "2" on it if it was .325

How many drive links and whats the number on the driver ?

 

Great information. I didn't know what those numbers and letters meant on these chains.

 

36 and 3

 

Only 36? That's really short!

 

Count was off 71

 

OK, so 71 DL's on 3/8 RS @ .050 .................

A 72 DL is for a 20" bar

 

I counted cutters the drive count is 71. So a 20" 3/8 .50?

 

Ahhhhhhhhh
You are too fast !!
You quoted my post as I was editing it

Its odd that you have 71 DL's and not 72 ?

 

I could be off by one lol

 

Thanks guys

 

Got it right off the Stihl website

 

I count much more accurately if my socks and shoes are removed beforehand.

 

I think there is some random brand bars that have a 71dl count for 20"?

 

Not too sure about that, unfortunately my memory isnt doing well in my later years, but I dont ever remember spinning an odd DL chain in 3/8's, other than 91 and 105.

Again, I am smart enough to know that I am too dumb to remember ....................