It does. You just need a pretty solid setup so the tool doesn't skate.
It applies a lot of pressure to the workpiece.
I had a few samples I got from Valenite, I think, in micrograin
carbide amd with a sharp edge. I could cut mild steel with them on my
old SB lathe. But most round inserts aren't so free-cutting.
I ground some half-round HSS bits to cut wire rope grooves in aluminum
and stainless pulley sheaves, which I made narrower and larger in
diameter than commercial pulleys for fiber rope. They do leave a
smooth finish but I had to wiggle them back and forth to reduce the
chip width instead of plunging straight in, or they would chatter
excessively on my old SB.
While my Harrison M300 will take a fair cut and the largest radius bit I
have is 8mm radius these days when I make the likes of bending formers
for my rotary draw tube bender I use the rotary table on the BP as it is
far easier and less prone to issues.
Adding to that, round inserts are usually made either for milling or
for rough-turning with rigid machines and a lot of horsepower. But you
get a "wiping" effect because of the geometry, and some applications
allow them to be used as really aggressive (and very strong) roughers,
while producing an adequate finish for many applications at the same
time, in a single pass.
Watch for chatter. As Jim mentioned, that's a limiting factor.
Chip-breaking is another.
BTW, for single-pass turning with rigid lathes, wiper inserts are the
coolest thing going. Or they were, a few years ago, when I last wrote
about them. I watched them at work at Sandvik (in NJ), and they were
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.