Cutting HDPE

[nate]

I'm trying to cut mutiple radiuses in high density polyethylene with a 1/4 inch spiral upcut. I'm getting small ridges on the radiuses but smooth ends on straight cuts. Is there any way to get the radius to be smoother in two passes?

[mrdovey]

Nate...

If your project allows, try cutting with a larger diameter bit to minimize the cutting ridges.

...Morris