Cutting Gator Foam (2")

[wcsg]

Was wondering if anyone here who cuts 2" gator foam with a 2.25" CED, 1/4" shank Belin bit goes through with 1 or 2 passes?

I usually cut 1" or 1.5" stock and use the 1.5" Belin bit, and do this in 2 passes.

But due to a 2.25" long bit and the fact that I've never cut anything this thick, I was wondering if I should make 4 passes or 3? Or should it be done in as few as possible?

Usually I reduce my F & S to 12k RPM's @ 2 IPS, I'm just weary of the extra long expensive $50 bit. I don't have VAC hold down, jut DS tape, the throught of a fraction of that tip cutting into the spoilboard is stressing me a little. :)

[Big-Tex]

this stuff is easy to cut. Rule of thumb is what you feel comfortable to cut.
Or better yet test on sample from vendor.

[Brady Watson]

Try a fresh, new regular 4-flute end mill on Gator. I've gone thru the stuff with excellent edge quality up to 9 IPS in 3/4". You can find Super Extra Long 1/4" end mills (I believe) up to 2" LOC. You might be able to snake a few more ticks out of the length if you go up to a 5/16", but 3/8" will for sure in SXL.

-B