Internet #203679935

Model #84922

Store SKU #158764

3/16 in. Rotary Tool Cone Silicon Carbide Grinding Stone for Stone, Glass, Ceramic, Porcelain, Gemstone (2-Pack)

  • For use with Dremel rotary tools (sold separately)
  • Ideal for sharpening, deburring and grinding on hard materials
  • Designed for working with conic and flat surfaces
  • See More Details

Frequently Bought Together


Product Overview

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Established in 1932

Founded in Racine, Wisconsin Dremel continues to innovate & evolve the rotary tool.

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Dedicated to the Makers

Inspiring passionate creators through a variety of rotary tools, accessories & project inspiration.

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Simple Solutions, Endless Possibilities

Dremel’s expansive line of versatile rotary accessories empowers Doers to create, rehab, tinker, build & customize your projects

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Grinding/Sharpening Accessories

Ideal for sharpening, deburring & general purpose grinding on a variety of materials—including metal, stone, glass, ceramic & more

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Variety of Bit Shapes

Made in dozens of sizes & shapes to support virtually every possible grinding application.

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Universal Shank Size

No more hunting for the right collet. All Dremel rotary accessories feature a 1/8” standard shank.

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Genuine Dremel Quality

Rigorous testing for safety & performance is core to our DNA.

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Aluminum Oxide Abrasive Wheel

Ideal for extended general purpose grinding & deburring on metals, castings, welded joints, rivets & rust

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Aluminum Oxide Grinding Wheel

Best for shaping, smoothing, sharpening, deburring, rust removal & general purpose grinding on most materials - including stainless steel

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Multi-Material Diamond Grinding Wheel

Features up to 30X the life of Dremel silicon carbide grinding stones.

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Aluminum Oxide Grinding Stone

Can be used for virtually every possible kind of grinding application. Sharpen cutting tools or grind off rivets, or remove rust.

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Silicon Carbide Grinding Stones

Tougher than aluminum oxide grinding stones. Ideal to grind & etch stone, glass, ceramics, porcelain & non-ferrous metals.

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Chainsaw Sharpening Stones

Ideal for sharpening chain saw blades, quickly & easily. Use with the A679 Chain Saw Sharpener attachment.

Dermal 84922 3/16 in. Silicon carbide grinding stone is ideal for sharpening, debarring and general purpose grinding on harder materials. Silicon Carbide Grinding Stones are designed to grind and etch stone, glass, ceramics, porcelain and non-ferrous metals. Always remember to have a spare battery pack charged up so you don't have to quit working to recharge your battery and keep your cordless rotary tool charged up and ready to go.
  • Designed to work well on stone, glass, ceramic, porcelain, gemstones and non-ferrous metals
  • Specially designed for working with conic and flat surfaces
  • Great for grinding and etching
  • For best results, insert the accessory bit all the way into the tool and then back it out slightly before tightening down

Info & Guides

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Diameter (in.)
0.1875 in
Product Length (in.)
1 in
Shank Size
1/8 in.


Accessory Fitment
Application Type
Number of Pieces
Rotary Tool Accessory Type
Rotary Bit
Tip Material
Tip Shape
Tools Product Type
Power Tool
Used With

Questions & Answers


Can this Dremel gizmo be used in an ordinary electric drill chuck??

Asked by DomeHepot March 20, 2016

Yes, but it will be almost useless since it requires high speed to be effective.

Customer Reviews

  • 14 Customer Reviews
  • 3.7 out of 5 stars overall
71% of customers recommended.
Overall Ratings
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Poor manufacturing quality
Customer review from logo
I bought two of these a while back, just to add to my collection of Dremel tools. They stayed in the package for a few months (indoors, no temperature shifts or anything) and when I opened them, one fell on the carpet in my living room. I picked it up, and the tip is split clean off of it! Expected better from Dremel.
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Response from ServiceNovember 15, 2019
We agree that would be very frustrating -and we're very sorry that happened. We will contact you directly to provide some assistance.
Tucson, AZ, United States
Great for Metal
Customer review from logo
I work in an Aerospace Manufacturing Firm and we use these particular stones quite often for deburr-ing metal, mostly heat treated steel with odd contours. As long as you don't have your Dremel at full RPM's and you do not use a heavy hand, these little guys can last quite a long time, often times I am brought back a nub as the stone is worn down to the core. I have used them and so have my guys and we all swear by them as a cheaper alternative to diamond embedded products.
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works great on glass bottles...
works great on glass bottles
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performed perfectly, completed the desired work requirement quickly and left...
performed perfectly, completed the desired work requirement quickly and left everything done just as I wanted it to me
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Customer review from logo
the head snapped off in 15 seconds of use, didn't quite meet my expectations...
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Rating provided by a verified purchaser...
Rating provided by a verified purchaser
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Performed as advertised...
Performed as advertised
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Working great to cut into small areas of stained glass....
Working great to cut into small areas of stained glass. Will be buying more.
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4 Star Review
Rating provided by a verified purchaser
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Great price, great product!
Love these things. The only thing I could be disappointed with is the little ridge on the tip of the bit where it should be rounded. I just grind that down with a shaping stone.
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