Got this old Pratt & Whitney 16" x 54" lathe hooked up. Set the feed rate to 60 TPI (slow as it goes) and engaged power feed on a light surface pass on a rod of crap hot rolled, and lo and behold terrible surface finish. I think it's feeding too fast.
Any ideas why? No I'm not using the half nut as a power feed.
>>1003031
tool was a rather large insert, an elongated diamond shape. Probably carbide.
Can you show us a close up of the finish?
>>1003057
Not at the moment, too tired from hooking up the phase converter.
ohhh...
I just realized I didn't have the right letter selected, my mistake.
go faster with carbide
or use HSS bit to finish
mild steel a shit
>>1003621
May also be tool centering
>>1003031
Uhh, you sure you mean TPI (Threads Per Inch)? That would imply that you are threading. Feed for a lathe should be given in Inches Per Revolution (and therefore be a decimal inch. Not anything nearing a whole inch).