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Internet # 100660642

Model # DR18108

Store SKU # 686731

Store SO SKU #315129

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1/4 in. Carbide Round Nose Router Bit

$38.97
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  • For CNC, automatic, hand-held & table-mounted portable routers
  • Cuts all composition materials, plywood, hardwood & softwood
  • TiCo Hi-Density Carbide for flawless finishes and longer life
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Product Details

About This Product

The Diablo 1/4 in. Carbide Round Nose Router Bit is ideal for decorative accents and engravings. Constructed from carbide and titanium for long-lasting use, the bit provides a safe, controlled cut.

Highlights

  • Requires a minimum chuck size of 1/4 in.
  • Provides a safe, controlled cut ideal for decorative accents and engravings
  • High-density carbide body with titanium construction for a long cutting life
  • Round nose with grooving on the bit
  • Tri-metal brazing for impact resistance
  • Return Policy

Product Information

Internet # 100660642

Model # DR18108

Store SKU # 686731

Store SO SKU #315129

Additional Resources

Shop All DIABLO

Specifications

Dimensions: H 5.5 in, W 2 in, L 1.8125 in

Dimensions

Cut Diameter (in.)

1/4 in

Product Height (in.)

5.5 in

Product Length (in.)

1.8125 in

Product Width (in.)

2 in

Shank Diameter (inch)

1/4 inch

Details

Bit Material

Solid Carbide

Individual/Set

Individual

Number of Pieces

1

Returnable

90-Day

Router Bit Type

Roundover Router Bit Set

Router/planer type

Grooving

Tools Product Type

Power Tool

Questions & Answers

How long is the bit?
ByJul 19, 2024
1 Answer | 
Answer This Question

The product length is 1.8125 inches. You can find this information, along with other dimensions, under the "Dimensions" section on the Product Details page.

By|Jan 31, 2025


Can you plunge with this bit?
ByApr 1, 2024
1 Answer | 
Answer This Question

This bit is not designed for plunging. It's best suited for creating decorative edges and grooves.

By|Jan 31, 2025


So now that you have confirmed that you are aware that the picture description is incorrect, why don't you fix the picture description?
ByJan 27, 2018
1 Answer | 
Answer This Question

That is the question for Home Depot. I just offer advice and solutions to customer questions. Sorry Chris. Hopefully the good folks at Home Depot will heed my advice.

By|Dec 6, 2025


If you know the description is incorrect, why don't you get it fixed?
ByJan 26, 2018
1 Answer | 
Answer This Question

It does rout a 1/2" DAIMETER rounded groove. So the tool is a 1/4" RADIUS. The picture description is incorrect.

By|Jun 2, 2026

(1)

What is the shank diamenter
ByDec 30, 2017
5 Answers | 
Answer This Question

It has a 1/4 in shank

By|Feb 26, 2019

    (1)

    1/4" shank. Did a great job for me. Used it with a Porter Cable router

    By|May 5, 2023

      Hi Joe, Thank you for your question. The shank size is 1/4" hope this helps.

      By|May 5, 2023

        The shank diameter is .25"

        By|May 5, 2023

          It fits a 1/4'' chuck.

          By|May 5, 2023


            Then why does the diagram show the radius (not the diameter) of the cut as being 1/2 inch?
            ByDec 19, 2017
            3 Answers | 
            Answer This Question

            This is a 1/2" diameter bit, I'm not sure why it says 1/2" radius on the picture

            By|Nov 16, 2025

            Looks like the person writing the info on the website has "radius" and "diameter" mixed up. I see this on several router bits.

            By|Dec 4, 2025

              Hi Chris, Thank you for your question. There may be an error on the website. For clarification, the radius is 1/4" and the overall diameter is 1/2". Hope this helps.

              By|Apr 21, 2022

                (1)

                If the shaft is 1/4 inch as in the specs then the diameter must be 1/2 inch
                ByDec 15, 2015
                1 Answer | 
                Answer This Question

                The radius is ¼”. The diameter is ½”.

                By|May 3, 2023


                  Viewing 1-7 of 7

                  Customer Reviews

                  4.7 out of 5

                  • 4.7 out of 124 reviews
                  • 94% recommend this product
                  Filter by:
                  Showing 1-10 of 124 reviews
                  Perfect to make routed marble holes in a wooden board game using 9/16" (14mm) marbles.
                  Perfect to make routed marble holes in a wooden board game using 9/16" (14mm) marbles.
                  by
                  • Verified Purchase
                  • Recommended
                  The Diablo 1/4 in. Carbide Round Nose Router Bit was used to mill designs into faces of new cabin...
                  The Diablo 1/4 in. Carbide Round Nose Router Bit was used to mill designs into faces of new cabinet/pantry doors. Works well, Produces a very nice clean cut and easy to control. Reasonably priced. See Photo
                  by
                  • DIY
                  • Verified Purchase
                  • Recommended
                  Used it to make drip edge on a cutting board and it worked fine. I put a bushing on it to follow...
                  Used it to make drip edge on a cutting board and it worked fine. I put a bushing on it to follow my template.
                  by
                  • Verified Purchase
                  • Recommended
                  Worked as expected!
                  Worked as expected!
                  by
                  This review is from 1/2 in. Radius Cove Router Bit
                  • Verified Purchase
                  • Recommended
                  The 1/4" Diablo Round Nose bit is a really nice little bit. It's very sharp and is still sharp a...
                  The 1/4" Diablo Round Nose bit is a really nice little bit. It's very sharp and is still sharp after cutting flutes into soft maple. It cuts and spins without chatter or vibration, doesn't leave burn marks, and is high quality like the other Diablo bits I use. My corded Ridgid palm router had plenty of power to run the bit.
                  by
                  • Recommended
                  This bit made my job super easy by taking a...
                  This bit made my job super easy by taking a plain 3/4 plywood cabinet door to such a simple fast an easy design with this bit. I'm going to add a picture of my finished cabinet doors.
                  by
                  • Verified Purchase
                  I used the router bit to cut a fingers slot in the lid of a bench I built so that I could open th...
                  I used the router bit to cut a fingers slot in the lid of a bench I built so that I could open the lid and store things in the bench. Worked perfectly.
                  by
                  This review is from 1/2 in. Radius Cove Router Bit
                  • Verified Purchase
                  • Recommended
                  We had a pair of Drawers in the Kitchen that were Opposing one another so when you opened one you...
                  We had a pair of Drawers in the Kitchen that were Opposing one another so when you opened one your hand hit the metal pull on the other! Ouch! so I cut a notch under the drawer so we could pull it out from underneath!
                  by
                  This review is from 1/2 in. Radius Cove Router Bit
                  • Verified Purchase
                  • Recommended
                  Yes. Used to create finger holes on end grain cutting boards. Makes burn marks if you take too...
                  Yes. Used to create finger holes on end grain cutting boards. Makes burn marks if you take too big of a bite.
                  by
                  This review is from 1/2 in. Radius Cove Router Bit
                  • Verified Purchase
                  • Recommended
                  Using this for juice grooves in my cutting boards -this new bit has eliminated the burning that occurred with other bits —I now get clean crisp grooves every time — great bit !
                  by
                  • Verified Purchase
                  Showing 1-10 of 124 reviews