Buy for the next project
Start with the cut you need, then choose the tool. These are practical examples to research, not a universal kit for every router or CNC machine.
For wood signs, consider one flat up-cut bit for pockets and one V-bit for lettering. Add a down-cut when the top edge needs a cleaner finish, a compression bit for suitable sheet through-cuts, or a ball cutter for curved work. Buy a plastic-cutting bit when you actually need to machine plastic.
Fit comes first: the shank is the smooth shaft held by the collet—the sleeve that grips the bit. Most examples below use a ¼-inch shank (6.35 mm). It is not interchangeable with 6 mm or ⅛ inch. Confirm an approved collet, spindle capacity, tool reach and speed range for your exact machine; these are not automatically matched to your finder selection.
Laser owners: these are cutting tools for routers and CNC mills. Lasers do not use router bits.
Pockets & grooves
Why consider it: A useful first choice for recesses and slots: its spiral lifts chips out of the cut.
Material to cut: Hardwood, softwood, plywood and MDF
Made from: Solid carbide
Size: ¼″ cutting diameter · ¼″ shank · 1″ cutting length
The upward cutting action can fray the top edge and pull on the workpiece. Secure the stock and leave finishing allowance where needed.
Clean top edges
Why consider it: Pushes fibers down at the top face, making it a useful choice when the visible surface matters.
Material to cut: Wood, plywood, veneer and laminates
Made from: Solid carbide
Size: ¼″ cutting diameter · ¼″ shank · 1″ cutting length
Chips are pushed into the cut. Plan chip removal; this is not an automatic choice for deep, enclosed pockets.
Plywood through-cuts
Why consider it: Combines upward and downward cutting edges to help preserve both faces of a sheet.
Material to cut: Plywood, laminates and solid wood
Made from: Solid carbide
Size: ¼″ cutting diameter · ¼″ shank · 1″ cutting length
The change between the two cutting directions must sit inside the material. Shallow passes may leave the top face in the up-cut section; check the tool drawing and your machine’s cutting limits.
Letters & decorative grooves
Why consider it: The pointed shape creates V-shaped lettering and details. The groove grows wider as the bit goes deeper.
Material to cut: Natural wood, composite wood and manufacturer-approved hard plastics
Made from: Solid carbide · three cutting flutes
Size: ¼″ cutting diameter · ¼″ shank · 60° included angle
Enter the exact 60° angle in your toolpath software. A flat board and accurate starting height matter for consistent letter widths.
Rounded & 3D carving
Why consider it: The rounded tip follows curved surfaces and makes rounded grooves. Add it when you have a 3D carving project.
Material to cut: Wood and suitable plastics for these recommended projects
Made from: Solid carbide · uncoated · two flutes
Size: ¼″ ball cutting diameter · confirm shank and reach on the current listing
It leaves ridges between adjacent passes. Pass spacing affects finish and machining time; use a flat cutter when the job calls for a flat-bottomed pocket.
CNC-cut acrylic
Why consider it: A large chip channel helps clear plastic chips. A useful specialist choice once plastic cutting is part of your work.
Material to cut: Acrylic and compatible plastics; confirm the exact sheet material
Made from: Solid carbide · polished cutting surface · single flute
Size: ¼″ cutting diameter · ¼″ shank · ¾″ cutting length
For CNC or automatic-feed routing, not handheld use. Heat and trapped chips can spoil the edge; use the manufacturer’s material-specific guidance.
Straight grooves & joinery
Why consider it: An example of carbide-tipped construction for straight grooves and mortises, without buying a full set of specialty profiles.
Material to cut: Wood joinery and grooves; confirm your specific material with the manufacturer
Made from: Carbide cutting tips on a steel body · two flutes
Size: ¼″ cutting diameter · ¼″ shank · 1″ cutting length · 3″ overall length
Longer reach needs clearance and a stable setup. Its cutting length is not an instruction to cut that deep in one pass.
The tool is made from carbide rather than having separate cutting tips attached to a steel body. It is common in spiral and small CNC cutters. The examples above include both uncoated cutters and polished cutting surfaces; those are different from an added coating.
Carbide cutting edges are attached to a steel body. The Whiteside 1016 is an example. This construction is also common in shaped woodworking bits; it is not the same thing as a solid-carbide spiral.
A coating is an added surface layer. A polished flute is a smooth chip channel. Neither changes an unsuitable bit into the right tool for every material. Use the exact product’s material list; do not judge by color.
“Solid carbide” does not disclose the full grade or ingredient percentages. We have not assigned a binder percentage, grain size or coating chemistry where the manufacturer has not specified it.
Manufacturer explanation of carbide-tipped and solid-carbide toolsFlutes are the cutting grooves that carry chips away. More flutes are not automatically better. Cutting length is the length of the cutting edges, not a recommended depth per pass.
