Round nose tipped carbide lathe tools

Quick question here. What are these tools with round cutters used for? I could imagine ornamental grooving but are they used for general turning? If so what is the advantage over the various more pointy bit types?

They are sold for profiling but they are going to result in a fairly length cutting edge so I suspect it may be difficult to use them without judder / chatter on our machines. You will probably have to take very shallow cuts but at least should end up with a smooth profile - if you can avoid said judder.

I think they are also used in copy-turning with a probe of the same diameter.

Neil

The smaller diameter ones are also used for profiling railway wheels / tyres etc.

They work very well if not rammed in too hard.

Steve

.

I used one with an 8mm shank recently in a fly cutter on the mill. Gave quite a nice result.

Nick

Yes they are for profiling and are easily used on Myford Super 7 sized machines.

I would not use them for general turning. Nothing wrong with the "pointy" ones if you use them as intended, they work well when worked hard but with care. However it is possible to use them for very fine working and a lighter touch. Experience and practice is the mastering of any form and style of cutter.

Edited By KWIL on 08/09/2015 22:26:46

Exactly, like this:

And the finished connecting rods:

Andrew

Used for machining a radius corner. Used a milling cutter with similar tips to machine a "J" weld preparation on the edge of a plate which required a 4mm radius.  Rotate the cutter tip when it gets blunt to get a new, sharp edge.

Edited By Paul Lousick on 09/09/2015 00:19:07

use mine all the time best tool i have