CNC Bit Reference — Genmitsu MC40A — Flat Upcut 2-Flute (Nano Blue)

Standard go-to bit for wood, MDF, and plywood. Upcut pulls chips clear of cut. Feeds & Speeds (Wolfpawn 4040 Pro, 3.175mm cutting dia): RPM: 10000 Feed rate: 800–1200 mm/min Depth of cut: 1.0–1.5mm per pass Plunge rate: 300 mm/min For 2.0mm cutting dia: RPM: 10000 Feed rate: 400–600 mm/min Depth of cut: 0.5–0.8mm per pass Material adjustments: Hardwood: reduce feed 30%, DOC 0.8mm max Acrylic: RPM 8000, feed 600mm/min, single flute preferred but this works Aluminium: not recommended — insufficient spindle torque at these speeds Specs Limits Applications Settings Tips Replace when you see burn marks or hear chatter — these are consumables. Buy in bulk; individual bits from Amazon are cheap. Shank runout increases with wear; check concentricity if finish degrades.