?What you must be careful off if you choise of the cutting speed and the feeding

* Stability of the work piece and the cutting tool.
* Stability of the machine and the motor power.
* The period time of the cutting tools worning out

This question is more complicated than it seems , every type of cutting tool has recomended parameters according to the type of material its cutting , setting up your tooling is as important as doing the design of the job it self ! Take the time to research your tool, look at the tool manufacturers recommendations, know your raw material stock, understand your machine and its limitations

You must select the cutting speed according to your cutting tool material which selected to be suitable for cut the workpiece material Feeding selected to reach the surface roughness you want

1- SHARP COATED TOOL .
2- SMALL DEPTH OF CUT
3- COOLING AND LABRICANT
4- TYPE OF MATERIAL SUCH AS HSS .
5- RIGIDITY OF THE MACHINE AND THE TOOLING SETUP.
6- WATCH UR RAKE ANGLE ( LATHEING )