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For general wood cutting on a CNC router, upcut spiral bits provide good chip clearance and are the most common choice. O-flute (single-flute) bits work well for softer woods and plywood at higher feed rates. For large V-grooves, miter folds and spoilboard surfacing, Insert-Pro bits with replaceable carbide knives are an economical choice.

An O-flute bit has a single, rounded flute channel that forms an O shape in cross-section. This geometry allows exceptionally large chip loads, making it ideal for high-speed CNC passes in wood and soft materials where chip buildup can cause burning or bit breakage.

The solid carbide bits in this collection use 1/4" shanks, which fit standard 1/4" collets on most CNC routers and spindles. Insert-Pro bits use larger shanks. The 94-301, 94-200 and 94-201 have 1/2" shanks, and the 94-302, 94-303 and 94-300 have 3/4" shanks.

Use a ballnose bit for 3D relief carving, contoured surfaces, and any toolpath that needs to follow a curved profile. Use straight or upcut spiral bits for profile cutting, pocketing flat-bottomed recesses, and through-cuts. The ballnose upcut spiral is a good starting point for 3D work.

A tapered ballnose bit has a tapered body that narrows toward the tip, allowing it to reach into tight recesses and produce finely detailed relief carvings with less risk of the shank contacting the workpiece. It is particularly popular for decorative sign carving and 3D panels.

The solid carbide bits are suited for hardwood, softwood, plywood, MDF and similar wood-based materials. Insert-Pro V-groove bits are also rated for MDF/HDF, melamine, laminates, plastics, PVC, solid surface, sign board, composites and foam. For guidance, visit the Infinity Tools learning blog.

Insert-Pro bits hold replaceable solid carbide knives in the bit body with a locking screw. When an edge dulls, you rotate the knife to a fresh edge, and when both edges are used you install a new insert. There’s no resharpening and no need to buy a new bit. Replacement knives are sold by bit part number.

Use the Insert-Pro 2-1/2" surfacing and rabbeting bit (94-201) for full-size spoilboards and wide panel flattening. Its 2+2 design pairs two shear-angle knives with two bottom scoring inserts. The 1-1/2" mini surfacing bit (94-200) suits smaller machines, router sleds and square-edge rabbets.

Remove pitch and resin buildup from bit flutes using a bit-cleaning solution and a soft brush after each session. Inspect the cutting edge under magnification for chips or dullness. Sharp bits produce cleaner cuts and reduce spindle load; dull bits increase heat and tear-out.

Yes. Items in stock ship promptly from Infinity Tools. Review the shipping policy for current processing times and carrier options.