o/t turning burnouts

[Gary]

I turn alot of 14 3/8 dia asme grade 70 burnouts and who knows of a good insert grade for this? I am not having alot of luck with tool life so I have been just using surplus off ebay to save $. I have run anywhere between 250 and 900 sfm and I have found that about 1/8 doc .01-.013 ipr to work the best. I am just needing some better tool life. I usually only get about 1 part per edge right now.

any suggestions?

[dpg752@TGI]

If you can sandblast edges before machining it will help.

[g-codeguy]

Haven't machined burnouts in a few years as we bought a Jet Machining Center, but as I recall the US735 insert made by Mitsubishi was the best of those we tried. Know we tried Kennametal, Sandvik, and Seco and probably a couple others.

[Darren Long SPE]

CNMX ... HTW IC907 from ISCAR ..... works a treat, High Metal Removal Rate and tough as a leather sandal!