A 2 or 3 flute endmill will usually finish better in aluminum. (than the tool you are using) Also, make sure that you are taking a finish pass with 0.005 finishing stock, climb mill (if possible), cut dry (if you're cutting on the outside of the part), use high rpms and prepare to get chips thrown at you.
For your feed (handle turning), practice and try to "time" a chip load of 0.001-0.002 for your finish pass. This might help you since you're just starting out and [probably] don't have a mentor. This may help you establish that "feel" that Toby is talking about.
Good luck!
Justin
Last edited by fpworks; 08-15-2006 at 08:43 AM.
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