F35Machinist
Aluminum
- Joined
- Nov 3, 2021
- Location
- California
I'm trying to machine a 1.25" deep pocket in 6061 Aluminum with 2 degree tapered walls using an extended reach necked down 3 flute .25" ball endmill with a 1.25" reach. I am currently machining with 5000RPM (~330SFM) 120IPM (.008 per tooth)with a .01" depth and width of cut. The machine is a Fadal 3016 (10k RPM max) and the setup is rigid.
In my experience with extended length cutters, I usually just reduce the speed and up the feed until the chatter stops. In this case, I need the walls to have a finer finish than the stable feed per tooth will allow. I would like to have a feed rate of around .001" per tooth, but I don't want to have to run this at 1000 RPM. Is there some trick to getting a good finish with reasonable productivity?
I am looking for some suggestions for: speed, feed, depth of cut, width of cut.
Thank you all and any help is much appreciated.
In my experience with extended length cutters, I usually just reduce the speed and up the feed until the chatter stops. In this case, I need the walls to have a finer finish than the stable feed per tooth will allow. I would like to have a feed rate of around .001" per tooth, but I don't want to have to run this at 1000 RPM. Is there some trick to getting a good finish with reasonable productivity?
I am looking for some suggestions for: speed, feed, depth of cut, width of cut.
Thank you all and any help is much appreciated.