This attached pic from Oregon implies that you only file using the 10 deg tilt angle when only using the file and that if your using the file guide you only use 0 deg tilt. Maybe I m reading that wrong or its a miss print. Something I never knew.
That's correct. If you tilt with that style of guide, your file will be to high at the working corner. You won't achieve enough hook.
I have some new loops of Oregon full chisel chain.... I will probably grind it at "0" just to see how it works..... I will probably also try grinding it at the "10" degree tilt, just to see if I can tell any difference in the cut!!!!! Have any of you guys just ground the Oregon chains at 0 degrees, rather than the recommended "10" degree tilt....
I round grind ( USG) ,and file (roller guides ) at 0 degrees . Never noticed any great difference in cutting speed .
I think the 10 deg angle makes the chain pull its self into the wood. But it may have other implications also. I had been using that guide for years and doing the tilt with it. Now I have a Oregon Grinder.
I think the 10 * is manufacturer specific . Oregon calls for it onLGX,LPX ,etc . . IIRC they call for 0* on semi chisel . Stihl calls for 30/60/0 on RS . Don't recall what Carlton calls for . So, I guess it comes down to designer preference . If your machine allows you to do it ,grind one at 10 ,and one at 0 . See if you can tell the difference .
It doesn't really take me anymore time to tilt to 10 than at 0. Well ok maybe 5 seconds a side but that's it. And now I tilt it all to 10° but I think the difference from 0 is small.
With the Granberg file-n-guide it is simple to go with the 25* top plate 10* down angle. Set it and go every tooth comes out the same. The Carlton chain calls for it also.
Here is one explanation for the 10 deg down angle by HOLMANTREE: If you all could bear with me, I'll try and explain better about the 10 degree down angle method I talked about earlier. This angle method was adapted when the semi chisel and chisel chains were developed in the late 1960s and early '70s. These chains had a taller, flatter side plate that needed a new filing angle versus the level method used on the standard round or chipper chain. If the file handle was lowered 10 degrees on the chipper chain which has a shorter [lower] side plate a negative cutting angle in the sideplate would result, even going into a backslope resulting in a very poor cutting chain. Now with the semi chisel and chisel cutter sideplate having increased height and flatness the filing method used on the chipper chain would produce a severe hook on the chisel chains. The level held file could be raised to produce a proper side plate cutting angle, but the top plate cutting angle would turn out too blunt. So how do you fix this? You guessed it........drop the file handle 10 degrees. This action raises the part of the file that contacts the sideplate and lowers the file section that shapes the top plate cutting angle.....now both angles are perfect.
