difference??

[dogdad]

Can someone tell me the difference between 3/8 PMN, 3/8P, and 3/8 chain saw pitch? I see that 2 of them require a 5/32 round file and one requires 13/64 round file. Thanks

 

[IchWarriorMkII]

3/8p or pmn stands for Picco, which means small. Its incredibly small chain, for low horsepower operations.


The cutters are smaller than .325, and much smaller than "real" 3/8 pitch chain, which takes the larger file to sharpen.

 

[upandcommer]

I will expand on it for ya 3/8 chain is for standard saws usually for the 60-95cc class and can come in any of the three most popular guages .50 .58 and .63 most smaller saws use low profile 3/8 chain which has the same pitch but has much smaller cutters and is usually only available in .50 guage thus less load on the engine. then there is pmn aka picco micro chain as stihl calls it same low profile cutters smaller yet and reduced guage to .43 for even less load on the motor. All three will do the job it is just the size of the curf (amount of wood the saw removes) and the size of the chips changes pmn which is the set up on the wifes 018c almost looks like course sawdust to the extreme of the 3/8 .63 on the 75cc poulan I have which looks like very large oatmeal. the amount of room to file is the reason for the different file sizes not a whole lot of differences between 3/8 lo pro and pmn so they can use the same file but the regular 3/8 is almost 175% of the size of the pmn on cutter area thus the larger file.

 

[Lakeside53]

3/8 is the "standard" chain, available in 1.3, 058, or 1.6mm gauge.

PM is Stihl's Low profile 1.3mm chain.. -Picco Micro Nice chain, used on the MS200T and a few other small saws.

PMN is the NARROW kerf Picco Micro... 1.1mm gauge. Installed on low power saws like the MS170/80, 192 and pole pruners. Takes 30% less power to pull it though the cut.

EDIT: Upandcommer types faster then me

 

[Mad Professor]

You can run the stihl 3/8 PM full comp chains on big saws up to ca . 24 in bar. Logosol sells Stihl PMX chain for milling, same as PM but ground to ca. 5 degrees. I've run it on a logosol M5 mill using a 066M w/24 in. bar, no problems. Less kerf and faster cut when milling. Cut is VERY smooth and less wavy than a bandsaw cut. (For some reason logosol has the market in USA on PMX, can't get through stihl dealer?).

When I show my lumber to bandsaw millers they can't believe a chainsaw cut it. A bandsaw still has less kerf but is NOT smoother!

Cutters are smaller and they live less than bigger cutters. Still I run my chains down until I break a tooth. Still gives a good rip until then if you are careful sharpening and take care of rakers.

 

[SawTroll]

You can run the stihl 3/8 PM full comp chains on big saws up to ca . 24 in bar. Logosol sells Stihl PMX chain for milling, same as PM but ground to ca. 5 degrees. I've run it on a logosol M5 mill using a 066M w/24 in. bar, no problems. Less kerf and faster cut when milling. Cut is VERY smooth and less wavy than a bandsaw cut. (For some reason logosol has the market in USA on PMX, can't get through stihl dealer?). .....

Stihl sells the "Logosol" saws, bars and (PMX) chains here, and I believe they sell more 660 Logosols, than the standard ones.......:biggrinbounce2:

 

[dogdad]

Thanks to all the above..great and useful information.

 

[Fish]

The important thing to remember about the Stihl 61pmn, is to not leave it
sitting out in the sun, as the heat will bend the cutters.................................

 

[carvinmark]

The important thing to remember about the Stihl 61pmn, is to not leave it
sitting out in the sun, as the heat will bend the cutters.................................

LOL