On 2010-09-01, Pete C. wrote:

Jon Elson wrote:

On 09/01/2010 03:34 PM, Pete C. wrote:

Ignoramus4117 wrote:

So, if we compare a cheap imported carbide endmill vs. an expensive
domestic endmill. Is there some identifiable difference between their
performance?

i

Forget carbide. You don't have the spindle speed or axis feeds to
benefit from them, and they are a *lot* easier to chip or break than HSS
endmills.

Well, I now do a LOT of work with 1/8" solid carbide end mills. Yes,
clearly, I don't have the spindle speed, either, but they are so much
stiffer than the HSS cutters. Also, because the solid carbide ones have
1/8" shanks, they are actually CHEAPER than many HSS with 3/8" shanks.
I've had great results in aluminum with the carbide.

Jon

How many have you broken? Iggy is just learning CNC *and* general
machining speeds and feeds, in my opinion, he doesn't need to be using
carbide tooling that he will have a much greater chance of breaking at
this point. He should also not be doing much with end mills under 1/4"
dia or so for a while until he gets the hang of things.

A broken 1/8" end mill is not the end of the world. When I need one, I
use one.

i