Hi,

I've had time the past few days to spend with my X3 again, and have been working on a few projects. Some questions popped up.

First, Feedrates. I still dont really know what Im doing here. With 3/8"-1/2" endmills its not a big deal really, I can listen and adjust accordingly, but the jobs I ran lately used a .187" endmill and I found I had to run at painfully slow feedrates (4-7ipm) to feel "safe"

How do I tell what feedrates a bit will safely cut at a set rpm?


Also, I'm interested in getting some plastics to mess with, but the last website I searched for prices, it all seemed higher than aluminum. Since theres 400 different types of plastic, what is a commonly used type for general machining?


Thanks in advance for any help!

Ben W