I have a M7 with a Husky 395xp, 20" Forester bar and the low profile Stihl chain that comes from Logosol. I have the oiler set to max and also have a water drip at the end of the chain.
I ran probably 20-30 tanks of gas using this chain before its last sharpening. This last sharpening, I was careful to make sure all cutters were the same length and also the rakers. On this last sharpening, however, I changed the top angle from the original 10 degrees to 0 degrees to see if it seemed to make a difference in cutting. One difference I noticed right away was that the strong vibration I had been getting in the first couple feet of the cut was gone, and overall, the cutting seemed to go smoother.
After about 3 tanks of gas, I was about 1 foot into a 6" wide cut in green pine, no knots, when the chain broke.
The break occured at the rivet hole on a drive link.
The length of the cutters on this chain are still about 75% of the original.
The question: Could changing the angle have anything to do with the chain breaking ?
After all, the chain had made much wider cuts, sometimes even in large knots, for some time before the break, albeit at the 10 degree angle.
Or could it be that finally fatigue caused the break ?
What think ye ?
I ran probably 20-30 tanks of gas using this chain before its last sharpening. This last sharpening, I was careful to make sure all cutters were the same length and also the rakers. On this last sharpening, however, I changed the top angle from the original 10 degrees to 0 degrees to see if it seemed to make a difference in cutting. One difference I noticed right away was that the strong vibration I had been getting in the first couple feet of the cut was gone, and overall, the cutting seemed to go smoother.
After about 3 tanks of gas, I was about 1 foot into a 6" wide cut in green pine, no knots, when the chain broke.
The break occured at the rivet hole on a drive link.
The length of the cutters on this chain are still about 75% of the original.
The question: Could changing the angle have anything to do with the chain breaking ?
After all, the chain had made much wider cuts, sometimes even in large knots, for some time before the break, albeit at the 10 degree angle.
Or could it be that finally fatigue caused the break ?
What think ye ?