Need Help!- CNC turning and machining odd shape

[bigmousepusher]

Hi u all, I have an aluminum shape that I need to machine(see attachment). If you can picture a 0.500" pipe with a 0.375" hole and two wings extruded straight across from each other to make a total of 2.75". The wings are 0.070" thick. So if you were to put the shape into a box you would need an area of 1/2 x 2 3/4, (get it). Good. Now what I need to do is notch 1 inch x 1 inch of both wings, and then round the pipe smooth so that an oring would seal. I have it chucked in a CNC lathe with a collet. The round part of course is easy. But when I try to groove out the 1 inch wing it bends on me. Does any body have an idea on how to do that? Thank you much.

[bigmousepusher]

Hi guys, I just linked an actual pix of this profile. Thanks.

[RedskinsJBS]

It seems like you are feeding the tool in too quickly.

[bigmousepusher]

I tried real slow with high and low spindle speeds. It still bends that 0.070" wing. I tried with a general purpose bit. I ordered some inserts for alu. that might help. Not wanting to side track your thoughts, but I was thinking of mounting a pnuematic motor for live tooling and using a 1/4 end mill. What speed and feed do I need? Thanks.

[Delw]

Make a split collar to locate on part of the wings and the od, have the wing just stick out enough to cut.
in order to cut the wings you need to support them some way as they are thing.
this collar slips into you collet.

a ccmt with a .008 rad tool will work fine our even a TPG insert(old school one flate no screw hole no chip breaker)
a negitive insert wont work that well.