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Spring steel is available in many shapes and sizes. It is not my area of expertise but I have never heard of it coming ground into a knife edge. McMaster Car has a few pages of spring steel coils that may work well for you. 0.05 thick 1.5" wide 4' mini coil for $32.10 in my old catalog. BTW a 30' coil is $90
Given the "thinness" of most spring steel you may be able to simply shear your way though the foam without knife edging the blade. It's all about the pressure(use very rigid backing for the foam and the blade holder). If that isn't working you could heat the blade and it should slice through like butter.
Last edited by 5axis; 06-10-2005 at 08:28 PM..
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