I was told it was caused by top-plate angle. Old timber cutters used to swear by square grind because it used a 15% top-plate angle which (they claimed) made the drivers pull less hard on the sides of the bar groove. They said that with the 30 degree top-plates that the round file produces...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.