1/4" Shank Roundnose Router Bits, 1/16"-3/8" Radius

Q: What router collet does this bit need?

These bits have a 1/4" shank , so they fit any router that accepts a 1/4" collet — which includes nearly all compact and full-size routers. Browse more carbide router bits .

Q: What is a roundnose or corebox bit?

A roundnose bit (also called a corebox bit ) cuts a smooth, half-round groove. It's used for decorative coves, veins, and fluting, and for rounding the interior edges of bowls and trays.

Q: What cutter diameters are available?

These roundnose bits come in 1/8", 1/4", 1/2", and 3/4" cutter diameters, with cutter heights of 1/4", 5/16", 3/8", and 9/16".

Q: What are these bits made of?

They feature micrograin carbide tips on C.N.C.-machined solid steel bodies for premium quality and long edge life.

Q: What projects are roundnose bits good for?

They excel at sign making, decorative fluting, and veining , and can round out the interior edges of bowls and trays for a clean, finished look.

Q: Can I round the inside edges of bowls and trays with these?

Yes. The half-round profile is well suited to rounding out the interior edges of bowls and trays , giving carved hollows a smooth radius.

Description Reviews Q&A Documents

Infinity Tools Roundnose (Core Box) Router Bits – Add Smooth Curves, Decorative Grooves & Details

Add smooth, flowing details to your woodworking projects with Infinity Tools Roundnose Router Bits, commonly called Core Box Router Bits. The fully rounded cutting profile makes these versatile bits ideal for routing decorative grooves, flutes, veins, and coves in furniture, cabinetry, doors, drawer fronts, signs, and other woodworking projects.

Roundnose router bits are also an excellent choice for rounding and shaping the inside edges of bowls, trays, boxes, and recessed areas, where their radiused profile creates a clean transition between the bottom and side walls.

For even greater versatility, our Top-Bearing Roundnose Router Bits allow the bearing to follow a template or existing edge, making it easy to create curved and decorative details on cabinet doors, drawer fronts, panels, and other custom projects.

Whether you're adding a subtle decorative accent or creating a prominent routed detail, Infinity Tools Roundnose Router Bits deliver the clean cuts and smooth profiles you expect from a premium-quality carbide router bit.

Router Bit Suggested RPM & Safety Guidelines

Frequently Asked Questions

What router collet does this bit need?

These bits have a 1/4" shank, so they fit any router that accepts a 1/4" collet — which includes nearly all compact and full-size routers. Browse more carbide router bits.

What is a roundnose or corebox bit?

A roundnose bit (also called a corebox bit) cuts a smooth, half-round groove. It's used for decorative coves, veins, and fluting, and for rounding the interior edges of bowls and trays.

What cutter diameters are available?

These roundnose bits come in 1/8", 1/4", 1/2", and 3/4" cutter diameters, with cutter heights of 1/4", 5/16", 3/8", and 9/16".

What are these bits made of?

They feature micrograin carbide tips on C.N.C.-machined solid steel bodies for premium quality and long edge life.

What projects are roundnose bits good for?

They excel at sign making, decorative fluting, and veining, and can round out the interior edges of bowls and trays for a clean, finished look.

Can I round the inside edges of bowls and trays with these?

Yes. The half-round profile is well suited to rounding out the interior edges of bowls and trays, giving carved hollows a smooth radius.

Is there a bearing-guided version available?

Yes. For more decorative options, top-bearing roundnose bits are available to create unique doors or drawer fronts. Explore the full lineup of carbide router bits.

Should I use this bit in a router table?

You can use it handheld or in a table, but a router table gives you better control and accuracy for fine decorative work.

Can I buy these bits as a set?

Individual diameters are available here, and you can save by browsing our router bit sets for a broader selection.

How do I keep a roundnose bit cutting cleanly?

Keep the carbide edges clean and sharp, and feed at a steady rate to avoid burning. The micrograin carbide tips hold their edge well for crisp coves and veins.

Infinity Tools 1/4" Shank Roundnose Router Bits