Originally Posted by pal
Originally Posted by Jim1611
...If you have a decent machine whether it's a lathe, mill etc. it should not be prone to vibrate...


Not so.

Every time an endmill flute begins its cut, every time a fly cutter begins its cut (etc) vibration is induced into the machine. This can be magnified, for example, when climb cutting, especially if there is any play in the ways.



True but and that's why good machines have plenty of mass to offset any vibrations that might occur. Each one is different too. On my Haas I always climb mill, even in roughing cuts. You can't do that on a standard mill for the most part. The cutter manufacturers have also changed the twist rate on the flutes too so they run smoother.