Cutting knot's

[neverenough]

This year the slab wood I got is unusually thick with knots. I've only run chipper chain, would switching to chisel chain go through the knots better??? Is there much difference between the square ground and the round ground chisel???

 

[SWE#Kipp]

The difference between chisel and semi chisel I think is that a chisel chain takes a full "bite" in the wood in its way through and the semi chisel leaves a corner of wood for tooth that comes behind. hope you understand semi chisel is supposed to stay sharper longer than a chisel chain ,,,,
Plz correct if I'am wrong !!!

 

[pinus]

Chisel is somewhat faster from semichisel cutter profile (this is discussed here a lot of). Probably this is true in the case of knots too.
Personally I like the very smooth cutting surface of semichisel, where all the wood structure clearly visible

 

[neverenough]

Ok, I'll explain the situation to see if it makes a difference in chains. I can put on a freshly sharpened (ground, then "touched up" with a hand file) chipper chain. I cut through the "normal" part of the trunk and it cuts so fast, I have to be careful of the exit. The wood is fairly soft, and it goes through fast (yes, the rakers are fine, a little shallow if anything). Now when I need to cut through a knot, I would say almost half of them, are so tough It's worse than cutting hardwood. I know the chain is getting warm (I checked). I've never really run into this problem on such a large scale before. Chisel chain? or change the angles I'm running 60/25/10. The 25 angle seems to best match a new Stihl chain (at least going by the settings in the grinder). Oh, I'm using my 036 for the knots.

 

[pinus]

Ok, I'll explain the situation to see if it makes a difference in chains. I can put on a freshly sharpened (ground, then "touched up" with a hand file) chipper chain. I cut through the "normal" part of the trunk and it cuts so fast, I have to be careful of the exit. The wood is fairly soft, and it goes through fast (yes, the rakers are fine, a little shallow if anything). Now when I need to cut through a knot, I would say almost half of them, are so tough It's worse than cutting hardwood. I know the chain is getting warm (I checked). I've never really run into this problem on such a large scale before. Chisel chain? or change the angles I'm running 60/25/10. The 25 angle seems to best match a new Stihl chain (at least going by the settings in the grinder). Oh, I'm using my 036 for the knots.

I will not talk abaout angles, but in the case of hard knots due to the hard wood and non square angle of the cutting surface with the wood fibres the force applied to the bar rail sides is strong, which needs the increased oil flow to compensate increased heat production due to the icncreased chain friction.