Wood Router, Snapping Cutters

[Tenson]

I just got some of the 1/8" (3mm) dia. single-flute cutters from toolstation for cutting 9mm birch ply. I'll let you know how it goes. http://www.toolstation.com/shop/p67412

Before these, I've been using 3mm 2-flute solid carbide. I've cut for hours on end with no problems. I've run 13000rpm and 2000mm/min and also 18000rpm and 4000mm/min. Both 4mm DOC. http://www.ebay.co.uk/itm/5Pcs-3-175...item5422121974

However I wanted something with a thicker shank so I could extend it further out the collet for various reasons.

I've used spiral flutes but up-cutters leave a horrible finish on the top edge. Down-cutters make it difficult to leave a constant thickness skin on the bottom cut to maintain vacuum.