Re: Feeds and Speeds 6061
you will need to give more information
make and model of the machine
control make and model
maximum spindle speed of the machine
does the machine have high speed machining ?
how much look ahead does the control have
what are the feed rates that the machine can obtain
what kind of tool holder are you using --end mill,er collet style,ect.
Re: Feeds and Speeds 6061
If you can find a 2 or 3 flute endmill it would work better.
I would break the depth of cut in half and do .75 at a time with HSM. 1.5" might be too much for one go at it. I usually do a 30 - 40% stepover.
If you have good coolant to evacuate the chips I would max out the RPM and do a feedrate of about .004 to .005" per flute. If I'm using a 3 flute at 7500 RPM I usually program the feedrate around 100. ipm.
Re: Feeds and Speeds 6061