I’d like to continue this conversation. I recently ran some test cuts on a piece of SeaDek. It’s 2-ply EVA foam 3mm each ply (6mm overall). I tried a 1/8th 2 flute spiral upcut end mill, a 1/32nd 6 degree tapered 2 flute upcut endmill and a 1/2in 90 degree v-bit, all at different speeds and different feeds. My best results came from the v-bit at 50 IPM and roughly 22k rpm. Speed didn’t seem to make a difference at all.
There is really no info out there about feed/speed for cutting EVA, like there is for other materials. I can look up on KING Plastics website their exact bit/feed/speed recommendations, but it seems like SeaDek and other marine flooring companies have kept this all hush hush. Maybe I’m looking in the wrong place.
The material is expensive so doing test after test is not very cost effective and was hoping to get some advice. I ordered a high speed steel straight flute foam bit to see how that works, and carbide v or shaping tools seem to work well.
I think on my next test I will ramp up my feed and slow my speed. Anyone have any experience with this product?
![IMG_5126|666x500] Roughing Pass with 1/8th endmill 30 IPM variable speed, (didnt see much difference through the range 16k-27 (upload://3vegtxotQXK6uRKz2n324qp5uBW.jpg)
![IMG_5140|666x500] The foam looks more like it was tearing and not sclicing.
![IMG_5138|375x500] You can see I used the 1/2 v bit to finish the mako and “D” The rest of the word Deuces (euces) was done soley with the 1/2" v-bit at 50 IPM APPROX 20k rpm. this achieved my best result