I am currently running a job in 12L14 ( Free machining steel )
Niagara 3/8" 4 flute TiAln
75% step over
S3500
F25
.075" DOC
And I am running it dry !
Really removes some material , flings chips pretty good. They aren't discolored and the work piece is just warm when done.
I am sure it could handle more but my setup is not very ridgid. It is hanging out of my 4th axis. Anymore feed or speed and I start to get some chatter.
If this was held in the vise I bet it would do F35 at S4000-4500.
The part is about 90% chips and I have gone through 12 feet of 1" bar on the same endmill. ( High quality endmills last much longer than the cheapies )
I love 12L14
Scott |