[Fixittt]

I did some searching last night on machinint steele,

somethings you need to find out,
are you trying to machine hardened steele? If so... STOP! Its not really gonna work.

if your getting chatter, speed up the RPM`s. Also what feed rate are U using? Maybe slowing down the feedrate some should help.

Also make sure your using some sort of cooling. either spray mist or flood coolant. Temps at the cutting plain can exceed 1,000 C

adjust your feed rate and RPM`s untill you are getting good sized chips.

I know you are wanting exact numbers, but that really cant happen.

Also make sure you are using a sharp endmill. If you dont know aobut th endmill, then get a new one. Also your material needs to be clamped down really good.