Originally Posted by
routalot
I wish you success with your project.I also think you will need to increase the lateral separation of the bearings carrying the Z axis.As peteeng points out you will need fairly high feed rates for foam and the leverage imposed by super long cutters will be racking the Z axis in two planes.Incidentally,80% of the length of the cutting flutes will never do any work.If you could find alternatives with a similar overall length but with only a third of the flute length and a waisted section above the flutes,they may well cost you less in the first instance and less to sharpen.