Todays Project - What did you do today?

[f350ca]

Was making bearing mounts for a transfer case on the processor and needed to remove a pile of metal. Started with 4 1/2 dia stock and needed to rough bore it to 2.65 ID. My Kenametal boring bar takes a 322? triangular insert, I've always used the two sided regular inserts in it. It does well with maybe .030 depth of cut. Ran across these inserts, no idea what they are called,(help Ken), .1 depth of cut at 500 rpm and ,007 feed rate was effortless with masses of C shaped chips flying.


Final rough bore, ready to be welded into the case, then final line bored to size.