CNC Router Bits & Sets

A compression spiral bit combines an upcut helix at the tip with a downcut helix above it. The upcut geometry supports and cleans the bottom face of the cut while the downcut geometry simultaneously suppresses tear-out on the top face, producing clean edges on both surfaces in a single pass — ideal for veneered plywood and double-sided laminates.

Use a downcut spiral bit when the finish quality of the top face is the priority — such as routing hardwood veneers, melamine, or face-frame material. Upcut bits are better when chip clearance and groove-bottom cleanliness matter more than the top edge.

Yes, CNC spiral bits with standard 1/4-inch or 1/2-inch shanks can be used in handheld routers. They excel in template routing, pattern work, and mortising where their chip clearance and smooth side walls improve over straight fluted bits. Match the shank to your router's collet.

The Bowl & Tray Router Bit with Bearing routes the smooth, curved interior of serving trays, cutting boards with juice grooves, and decorative bowls. The bearing guides the bit along a template edge, and the rounded profile produces a continuous concave surface without faceting.

The Deep Reach Bowl & Tray Router Bit has a longer cutting length than the standard bowl bit, allowing it to rout deeper trays and serve as a CNC surfacing bit for larger bowl blanks. The standard bit suits shallow tray profiles and everyday serving board work.

CNC bits in this collection are available in both 1/4-inch and 1/2-inch shanks. The 1/2-inch shank bits are preferable for larger CNC spindles and production routing because they run truer with less deflection under cutting loads. Match the shank to your spindle's collet specification.

Spiral bits generally outperform straight fluted bits in CNC routing because the helical geometry shears the wood fibers more efficiently, reduces cutting resistance, and clears chips better. Straight bits can still be useful for certain plunge applications. The Straight Router Bits with Plunge Point are designed for direct plunge-down cuts when initiating interior pockets.

Yes. Solid carbide spiral bits handle MDF, plywood, hardwood, and softwood effectively. For laminated and veneered plywood, the Compression Spiral Router Bits are the best choice because they clean both faces in one pass without tear-out.

Both are available. Individual bits are in this collection, while purpose-built sets for fine detail work, O-flute cutting, and sign making are in the CNC Router Bit Sets collection. Sets are a cost-effective starting point; individual bits let you expand as your CNC projects demand.

Yes. All CNC router bits are covered by Infinity Tools' quality commitment. Full warranty and return details are on the Quality Guarantee page.