I want to be sure I've sharpened the pico mini chain I have to the right specs. So I was looking through the owner's manuals of My 009 and MS170 saws, and I saw what might be conflicting information in the MS170 manual.
So as best I can determine, the 3/8ths Picco chain, which has a 0.050 in gage, uses a filing angle of 35 degrees, although the 009 manual says for hardwood or frozen timber, to reduce that to 30 degrees. It also shows the depth gage setting as 0.65 mm (with a comment that it could be increased to 0.85 mm for cutting softwood in mild weather).
For the 3/8ths inch picco mini, which has the 0.043 in gage, the MS170 manual calls for a 30 degree filing angle. For the depth gage, it is not clear if they are recommending 0.45 mm or 0.65 mm depth gage setting.
The confusion is that in some places I've heard terminology of "picco micro mini" which I've assumed matches a .043 inch gage chain type of PMM or PMMC3. Elsewhere I read references to PMN, which some people call "picco micro narrow." I don't know if this is different terminology for the same chain type, or two chain types.
Related to that, in my MS170 saw manual, it refers to 3/8 PMN having a depth gage setting of 0.45 mm, and both a 3/8th PM and PMMC3 as each having 0.65 mm depth gage. So if PMN and PMMC3 are both describing picco micro mini, which of these two depth settings are correct?
Thanks for any help in interpreting Stihl-speak.
Terry Quinn