Hi,
I'm interested in the angle of the insert on these boring bars.
I was taught to keep the "plan approach angle" of the tool at 90 degs to the wall of the bore (as if you wanted to make the bottom of the bore flat). If the tool tip is angled so the point leads, there is the risk / tendancy for the tool tip to dig in as the tool advances and as the boring tool is quite long (and relatively flexible) this results in a bore that tapers outwards as the depth increases.
Has anyone had problems with this?
Ian.