VerRich 1/2" 12mm Shank Indexable Lathe Turning Tool,14Pcs Lathe Tool Kits with 10PCS DC070204 Carbide Inserts and 4Pcs Turning Tool Holders S12M-SDUCR07/SDJCR1212H07/SDNCN1212H07/SDJCL1212H07

For many years I've used 1/2" TCMT insert tools on smaller lathes from 10" to 13" and workpieces that were smaller than 2" OD. They were just OK but I needed something that had a smaller nose radius to make tight inside corners and was hoping for a better finish on whatever type of steel I had available at the time. Someone had recommend that I use a smaller nose radius tool to achieve my goals. The first thing I did with these tools was to make an adapter to put the boring bar in a QCTP holder that had a 3/4" bore. I used a scrap 4041 steel rifle barrel blank. At a speed much slower than expected I got a beautiful finish. At 720 rpm, a feed rate of .003" and a DOC of .010 I got a beautiful finish. That's a much lower feed and speed than the calculators recommend so even older lathes like the ubiquitous South Bend and Craftsman lathes can get a great finish without needing speeds beyond their capabilities.

Used on regular steel

Amazing deal. The quality is great, never had any issue with any of these tools. Geometry is good, the heat treats good, the carbide cuts everything you can throw at it. Anybody that has any type of issues after buying this tool, before you go riding and ignorant review, just remember, are you smarter than a tool? You're probably doing something wrong if you're having issues or you have a junk machine

Perfect for my size lathe.