Boom! I use this up/down mode on my CNC all day. It does not stop. This bit has become my go-to production tool for 1/2 and 3/4 plywood. I even smashed it a few times which caused an uncomfortable strain and it still holds up and goes through Baltic birch with no issues, cracks or torn edges. This is a really good cutter for the price. Update: Many hours of work on this and it just won't stop. It works well with plywood and plastic.