Need Help!- Down cut?

[a_johnson]

Hi

I am cutting 1mm Lexan plastic and the type of cut I am doing is difficult to clamp, I cannot use tapes or adhesives since the lexan is going to be used as a windows in some equipment so I dont want to add the time of cleaning off any glue residue.

So I clamp the material with a wood frame. Now when I use a single flute up cut end mill the material is lifted.

My question is, can I switch to a down cut bit which should push the material down or will I get into big trouble with the cuttings having no where to go?

Thanks

[JEST]

I use down spirals all the time for thin polycarb materials. A little air helps keep the cut clear. Should work fine.