CNC Routers and CNC Router Bits, Built For Beginners.

ROUNDING BITS

A rounding router bit softens a sharp, square edge into a smooth, rounded profile, which gives a woodworking project a finished, comfortable feel. It cuts a clean quarter-round along the corner of the wood, so edges are easy to hold and less likely to chip or splinter. Our rounding bits carry a carbide cutting edge and a 1/4" shank that fits most CNC routers.

Edge Rounding Bit Set 1/4 & 1/8 Radius Pointed Tip 1/4 Shank For CNC Routers

$56.97 USD

1/4" Radius Round Over Router Bit, 1/4" Shank (Corner/Edge Rounding)

$35.42 USD

1/8" Radius Edge Rounding Bit For CNC Routers, 1/4" Shank

$28.82 USD

CNC Router Bit Set for Card & Game Piece Holder-Making w/ FREE Design Files

$199.89 USD

Edge Rounding Bit Set, 1/4" & 1/8" Radius

The edge rounding set is best suited for anyone who wants both common radius sizes on hand for different projects. It pairs a 1/4" and a 1/8" radius roundover, so you can put a bigger, softer round on thick edges and a light round on thinner stock. Both come to a pointed tip that keeps toolpath setup simple, and buying the pair costs less than the two bits on their own.

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1/4" Radius Round Over Bit

The 1/4" radius roundover is best suited for full-size edges on cutting boards, boxes, and furniture parts in thicker hardwood. It rounds a generous quarter-inch corner in one clean pass, and its pointed tip means no offsetting in your design software, so you just run it along a profile line. This is the classic corner rounding bit for a smooth, finished edge, and a high-quality carbide edge keeps it cutting clean. The 1/4" radius is the sweet spot for most furniture edges.

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1/8" Radius Edge Rounding Bit

The 1/8" radius edge rounding bit is best suited for a light, subtle round on thinner stock and smaller parts. It takes the sharp corner off an edge without rounding it over dramatically, which suits signs, small boxes, and detail work. Like the others, it runs on a quarter-inch shank and comes to a point for simple setup.

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WHY CHOOSE OUR ROUNDING BITS

BUILT FOR BEGINNERS

Shank sizes are matched to your machine and written guides walk you through each project. You are not left guessing at cut types or settings before your first carve.

SMOOTH, ROUNDED EDGE

Each bit rounds a sharp corner into a smooth, even edge in one pass, so a project feels finished and comfortable to hold.

NO OFFSETTING NEEDED

The pointed tip lets you run the bit straight down a profile line with no form-tool offset to set up, which keeps programming simple.

When to Use a Rounding Bit

A rounding bit is the right pick when a sharp, square edge needs softening into a smooth curve for looks, comfort, or durability. It rounds the corner in one clean pass, so edges feel good in the hand and hold up better to knocks and wear. Common projects include:

Cutting boards and serving boards with eased, rounded edges
Boxes and lids with a smooth, rounded lip
Tabletops, shelves, and drawer fronts in hardwood or plywood
Signs and plaques with a softened border

Our Guarantee to You

Our rounding bits are made in the USA and covered by the IDC Woodcraft 90-day guarantee. If a bit breaks within 90 days, send it back with the return form, and we will replace it with the same model. If you are not happy with how it cuts or holds up, reach out and we will make it right.

ABOUT IDC WOODCRAFT

IDC Woodcraft is based in Madison, Indiana, and led by founder Garrett Fromme. We make solid carbide CNC router bits in the USA and sell them alongside CNC machines, spindles, vacuum tables, routing accessories, software, and project files, helping customers build a working CNC shop without sourcing equipment from multiple suppliers. We also publish an extensive library of free CNC training resources, including long-form YouTube tutorials, videos, written articles, and a chipload calculator. Beginners get straightforward guidance, while experienced CNC workers get dependable bits for longer production runs.

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What our customers are saying about us

IDC Woodcraft is possibly the best company you can buy from because of all the added extras you receive at no extra cost. The bits remain extra sharp even through them unwanted cuts that hit screws etc. The videos that Garrett produces have really helped me along my short journey into CNC.

- Paul G

Garrett is providing a great product. His bits perform exactly as advertised (even though it can take a few test runs for the timid to be convinced the parameters provided are correct). I've used several of his bits and I'm a big fan.

- Randall B

IDC's CNC training videos, resources, and bits are unparalleled! Garrett has a simple and succinct way of explaining advanced concepts to beginners and experts alike. IDC's customer service is excellent. Highly recommend!

- Chris F

Not only are IDC Woodcraft bits the best available and reasonably priced, but the service and attention to detail are top notch. I have never had a better personal experience dealing with a vendor than I have with IDC Woodcraft. I cannot recommend them highly enough!

- David B

IDC Woodcraft is awesome. I've ordered bits from them several times now. The bits have arrived quickly and are of very high quality. I've had zero issues using their router bits. Will be buying more bits soon. Garrett, your videos are also very well done and super for helping beginners get started.

- Duane G

Best in the business! I started watching IDC videos on Youtube before i ever bought my first router. Its what gave me the confidence to do it. Knowing that any info i would need, to learn the craft, would be available in one place and would be easy to follow and understand.

- Brian M

Best CNC bits I ever had. IDC app is very helpful for feed and speeds. My CNC journey started smooth with the help of videos and I have learned a lot from Garrett through his videos. Highly recommend.

- Afran A

Garrett and IDC Woodcraft are top-notch. Not only do they provide some of the best, most useful CNC workflow, production, troubleshooting, and just plain fun videos on YouTube, they host live sessions and Garrett is always ready to respond to a request for help.

- Darin M

Frequently Asked Questions

What is a rounding router bit used for?

Woodworkers reach for a rounding router bit whenever a sharp, square edge needs to be softened into a smooth, rounded profile. It rounds the corner of the wood in one clean pass, which leaves an edge that looks finished and feels comfortable to hold, and it is a staple for cutting boards, boxes, and furniture.

What radius rounding bit should I choose?

Match the radius to the thickness of your workpiece and the look you want. A 1/4" radius rounds a generous, soft edge that suits thicker stock like cutting boards and tabletops, while a 1/8" radius takes the sharp corner off thinner parts without rounding them as much. The 1/4" is the sweet spot for most furniture edges, and running the bit on both the top and bottom of an edge creates a full bullnose profile.

Can I use a rounding bit in a handheld router or router table?

These bits are built for CNC routers, and because they come to a point with no bearing, they are not for guided router tables or hand routers the way a piloted roundover is. A traditional roundover rides a ball bearing or steel pilot against the edge, but a CNC bit relies on the toolpath, so the machine controls the depth and path with precision for a consistent rounded edge. Match the 1/4" shank to your router's collet and let the toolpath guide the cut.

How do I get a smooth edge with no ridge?

A clean rounded edge comes down to running the bit at the right depth. Set it to follow the profile line at the depth listed for the bit, since going too shallow or too deep can leave a small ridge where the round meets the face. A light finishing pass at the right feed rate cleans up any ridge for a continuous curve and a smooth surface finish, and our feeds and speeds guide can help you set the pace.

What size shank do these use?

All of our rounding bits run a 1/4" shank, which fits the collet on most standard CNC routers. That shank diameter keeps the bit rigid through the cut for a clean, even round, and you can dial in feeds and speeds for each one with our free chipload calculator.

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CNC Routers and CNC Router Bits, Built For Beginners.

ROUNDING BITS

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Edge Rounding Bit Set 1/4 & 1/8 Radius Pointed Tip 1/4 Shank For CNC Routers

1/4" Radius Round Over Router Bit, 1/4" Shank (Corner/Edge Rounding)

1/8" Radius Edge Rounding Bit For CNC Routers, 1/4" Shank

CNC Router Bit Set for Card & Game Piece Holder-Making w/ FREE Design Files

Edge Rounding Bit Set, 1/4" & 1/8" Radius

1/4" Radius Round Over Bit

1/8" Radius Edge Rounding Bit