Quote Originally Posted by silyavski View Post
What is the name of the plastic exactly that are you trying to cut???

That makes a BIG difference. feed and speed i mean.

Why these expensive bits. I can 100% recommend you these http://www.ebay.es/itm/1-4-3-FLUTE-C...66d1932&_uhb=1

I use them from a lot of time and a lot of time, extremely sharp and durable. And great price. For example outlasts x10 times the similar Freud/3x price/ and is quite sharper.
I would think it will be ABS Silyavski, thanks for the link i've added it to my ebay watching list, I was thinking that a nice sharp+hard cutter (carbide) would be better but didnt even think about the helix, thanks for the tip!

.Me