I burn about 90% black locust. If cutting dead I shallow up the grind angles on the chain to provide more strength to the cutters edge and add more depth to the guide teeth. Will not cut as fast but lasts a whole lot longer. Keep a bucket of chains ground that way. I have an Oregon grinder but after the changing the angles I still use a file unless a chain is messed up. Have found grinders waste more chain but if you do not want to learn how to file right it is the best option. A tooth on a chain is a compound angle tapering from front to back and from side to centerline. if the point of the teeth on one side gets longer than the other, the saw will cut a radii instead of straight as the longer side takes a heavier chip. Dead locust will spark pretty cool
If a grinder is taking too much.....it's the man not the machine.
A guy said the same thing to me and I blacked the cutters and then ground top and bottom of tooth not touching the middle.
I've also had a shop blue all the cutters and take half the cutter with the grinder set wrong. That was the day I got my first grinder.
But I was a tool and cutter grinder by trade so I had a head start. Lol
There is a "feel" to grinding that some folks never acquire.........just like filing.
I do a lot of chains......lots of grinders. I don't change wheels.
