YINGHUA Up Down Compound One Flute Spiral Carbide Mill Tool Cutter 4X22X45mm

4 mm carbide router bit

This 4 mm carbide router bit is built for CNC machinery and targets professional woodworkers and sign makers who need clean edges in a single pass. The up-down compound geometry compresses the top and bottom surfaces of the workpiece, reducing tear-out on laminates and veneers. It suits production shops that value repeatable accuracy over hand-held routing.

22 mm cutting length and 45 mm overall length

The 22 mm flute length provides enough reach for typical panel thicknesses while the 45 mm overall length keeps the tool rigid in the collet. One-flute geometry clears chips quickly in acrylic, PVC, density board and solid wood, but the single flute limits feed rates compared with multi-flute cutters. Deep pockets beyond the flute length will require multiple passes or a longer tool.

Single-flute compression cutter for CNC routers

The cutter fits standard ER collets or shrink-fit holders that accept a 4 mm shank, so it works with most desktop and industrial CNC routers without adapter sleeves. Its tungsten-steel construction resists wear in abrasive composites, freeing the operator from frequent tool changes. The design is not suited for hand-held routers or for users who need plunge-cutting in metals.