Hi Alan
I have various assortment of toolbits ranging from HSS thru Carbide brazed, inexible insert, to a diamond bit & holder, I have found that my 'go to' tool is the diamond bit & this is more or less permanently mounted on my QCTP on my WM250V-F lathe as it cuts anything that I have put in the chuck :thumbsup: Cast Iron,Brass,Aluminium, Mild steel, copper, bronze, although I haven't tried it on Stainless, yet! although I have no doubt it will cope but stainless being what it is & the need to plough through it I'm sure the HSS cutter tip won't last as long as with other materials but I haven't had the need to use stainless yet:shrugs:.
As for boring bars; the same selection applies plus a couple of small carbide boring tools (CNC centre coolant fed) that I picked up somewhere over the years, I prefer to use a 21/2" face mill as opposed to a single point fly cutter.. thump,thump, intermittant cut!, plus a 3/4" one as well, both with 90* indexible tips, am looking at getting another 21/2" mill with 45* tip angle. .
I recently bought some more toolholders for my QCTP at our national annual exhibition (Harrogate for our UK members) which brings my number up to 17..& I am still looking at getting some more.. always the same scenario.. mmm! should have got some more when I was there :thinking:, as with other members QCTP are much more convenient, off & on as needed & no resetting centre height once set, until as & when you need to regrind a tool. I have also bought a ER 25 collet set, 1-16mm range which I use all of the time, apart from when I have the face mill in, again as an afterthought.. should have got the ER30 set, 1-20mm range..oh well! I'm always full of afterthoughts :thinking: always trying to save a few pennies here & there & end up telling myself.. should have !
So Alan that's my two cents worth for what it's worth, enjoy your machining :thumbsup:
Cheers
George