I'm trying to machine a cylinder liner from a nice piece of 50mm cast iron bar from folkstone engineering. All done, but I can't get a good finish in the bore. I'm about 0.15mm from size now and rapidly running out of road!
I've tried a Glanze boring bar with CCMT type tip and a standard boring bar with a brazed carbide tip and a whole range of different speeds. I'm spot on centre with the tip.
Difficult to describe the finish, but 0.15mm should be enough meat to sort this out.
Any thoughts on how to get a good finish?
Steve