oregon chain identification for file size

[tmroper]

I have a full skip chain on my Huskiy 288 xp lite and am having a hard time identifying the chain.  I have looked at all the charts and must be looking at something wrong because I can't find the letters needed to narrow it down to which size chain it is.
It has a 24" oregon bar #  240xxx009     3/8"pitch and the only number I can find on the teeth is 72.  I also found the 25 stating which depth to file the rakers.  Where should I find the letters?  Or does someone know which chain I have?

[Tony-Fin]

Here is a link into Oregon's website. Sorry, I don't know how the full skip changes the identifications, marks or type.

=http://www.oregonchain.com/pro/lookups/selguide.aspx?BusId=OCS&SellReg=USA&LangId=ENG

[Cut4fun]

Oregon 72 3/8 050 would be a 7/32 file for sharpening. 25 would be for the raker height to cutter, 25 thousandths. Hopefully I worded that right so you could understand. 

[HolmenTree]

You have a Oregon 3/8 [.375] fullskip chain.
Newer model would be a 72 JGX [guard depth gauge] or 72 JPX [ guard drive link]  if its round ground for a round file ,which is 7/32".
Square ground [chisel bit file] its a 72CJ or CJX [ guard depth gauge] or 72 AJ [guard drive link].
Confusing isn't it  :D
Willard

[tmroper]

Thanks guys I had looked at that oregon and madsen's site before posting and even had the magnifying glass out looking for a letter on that chain to go with the 72 and couldn't find anything. :D  I suppose you have to just really know chain to be able to identify the exact tooth you have.  It will make life a lot easier know exactly which file I need before making the trip to town.

[John Mc]

Oregon's web site can be helpful: http://www.oregonchain.com/pro/pro_home.htm From the drop-down "Products" menu, go to "forestry", then over to "saw chain - 3/8" pro" and choose the type of chain you want to see more about.

Bailey's (a Forestry Forum sponsor) also has good chain information. This link will take you right to their chainsaw chain page.

All of Oregon's "72" chain is 3/8" pitch, .050" gauge. The descriptions on either site will help you find what you need

[HolmenTree]

Thanks guys I had looked at that oregon and madsen's site before posting and even had the magnifying glass out looking for a letter on that chain to go with the 72 and couldn't find anything. :D  I suppose you have to just really know chain to be able to identify the exact tooth you have.  It will make life a lot easier know exactly which file I need before making the trip to town.

Regardless what type of 72 chain it is, it always takes a 7/32" file, 13/64" file when the cutters are filed below 1/2 cutter length. Even if it is a square ground chain the 7/32 round file will take over. Maybe I shouldn't confuse you about the square ground, just use the 7/32. :D
Look at the depth gauge [the part with the 25 on it] if the front of that part of the tooth has a sloped hump on the front of it then its a 72 JGX .
Post a photo of it if you can.
Willard.

[01crewcab]

If indeed it's chisel bit chain not ground round then he's going to want the correct file. Either a triangle or a "goofy" file.

[Cut4fun]

If it is square chisel CL chain he may want 6 sided bevel file over those other 2. goofy is just a modified round imo, triangle is to hard for me, 6 sided was easier, even though I still smell at it.

I would bet it is round though.

[tmroper]

Thanks guys
It is round and don't apologize about giving to much info it is an opportunity to learn.  I picked up some files tonight.  It is quite a little trot into town but the wife wanted to go out and eat some bbq and I needed some files so we made a trip of it and got some good eats.  I am planning on running the sawmill (circular) and will need to buck up some logs.  It is almost calving time so we need the plank to get the corrals in order.  It was sure nice to know what size file I needed walking in the store.  I just got done trying the files out and the chain cuts great.  I kinda felt like ol' cut4funs picture there. ;D

[Tony-Fin]

I have tried couple of times  a smaller file what the specifications says with good results.
I use at first some strokes 3/16 as recommended and after that some strokes with 5/32.
In a new chain the outside side plate angle 85°to 90°. After filing with round file the angle is
more than 90°.
Filing with smaller file bring angle back closer to 85° or something. So it creates a little peak into chain and makes chain act more grabby. Notice that if you tried this do not file too much with smaller files because
if peak is too big it fatiques chain really.
Angles
I have used semi-chisels this far but will try full chisel soon.