david n
Diamond
- Joined
- Apr 13, 2007
- Location
- Pillager, MN
This is the only 55° insert boring bar I have in the shop......5/8"Ø.............DPMT21.51 insert..............don't really use them. Now I have this Ali part that I want to back bore a tight-ish Ø(+/-.0008) and part off..........one op. Super light cuts......one rough at about .05 and then finish around .015 doc.............I have been fiddlin' fartin' with this piece-o-crap for pert-near an hour and my Ø's are all over and the Z depth is wacked too...........AFAICT the insert must be wishy washy in the pocket.......but the screw is snug and I can't really see if it moved............anyone else have problems with this style insert/boring bar? Or is it just the one I have that is cursed? I tried lighter DOC but no go.....I get a few good parts and then scrap.............Adjust the offset and just more of the same................I might just order up a new one.............