When a chainsaw operator can comfortably touch up his or hers sawchain at the stump, life is so much easier and enjoyable. Save the heavy rocked out chains for the vise in the garage.
As I show you in my photos:
_sit down, relax and get a good grip on your saw and file handle.Only my right arm is working and only it needs to be trained for the best precision filing strokes.
_you can see I have a good view of the cutters from both positions. I have sharpened my Stihl 090 with a 60" b/c this way also. No energy is spent supporting the saw.
_Always use a file in good shape. I have used up to 2 new files on a rocked out 20" chain. For quick touch ups a new file will last along time.
_First off tighten up the chain snugly to help avoid movement of the cutters.
_In the 2nd photo as I'm filing the right hand cutters it takes a little more down pressure on the file to keep from making a "lazy backslope" on the cutter. But be careful not to slip the file out of the gullet and cut your knuckle on the left hand cutter directly behind it. Even thick leather gloves won't protect that index finger knuckle.[ a dull file will easily do this]. ALWAYS FILE THE RIGHT HAND CUTTERS FIRST, to help avoid a dangerous slip on to a sharpened left hand cutter.
_While filing the right hand cutters in this 2nd photo position its easy to file a blunter top plate angle from what you can do on the left hand cutters.
_ While filing the left hand cutters as the first photo shows be careful not to put too much down pressure on the file as its easy to do in this position. Also don't put too much top plate angle in as its also easy to do.
It takes practice plus building up your filing arm with grip strength and endurance. I have filed a badly rocked out 24" chain with 1/3 of the cutters gone with 2 new files and be done in under 20 minutes flat with this technique. In this relaxed position only energy is spent on my right arm and grip strength.
Give this a try and you will thank me later.
Willard.