Dremel 8100 Cordless Rotary Tool Review

Dremel is famous for making high-performing and multipurpose rotary tools. Their Dremel 8100 is one of their most common units, and DIYers and professional contractors love it because of its power and versatility. Also, this cordless rotary tool is one of their easiest to use, and even first time users will have an easy time figuring it out.

With the Dremel 8100, general projects like cutting, sanding, and polishing will become simpler and faster. But to make sure that you are making an informed decision it is always important to know what it has to offer and why it is a good pick for your projects.

If you want to buy a Dremel rotary tool, here are some reviews that I recommend for you to read such as Dremel 8220Dremel 7300Dremel 7700Dremel 3000, Dremel 4000, Dremel 220-01

Dremel 8100 Cordless Rotary Tool Review

Dremel 8100 Cordless Rotary Tool Review

Dremel 8100 is an excellent rotary tool that is quite powerful and suitable for various uses around the home or in a workshop. This cordless tool is for people that are passionate about doing some hands-on project, and its performance will never disappoint.

#1. Variable Speed

This tool makes it possible to select the speed according to the task that you want to complete so that you can do it fast enough and efficiently. It has a variable speed setting that ranges between 5,000 and 30,000 RPM. What makes the Dremel 8100 rotary tool kit unique is that it produces more power than most others on the market even at the lowest speed setting.

#2. Battery

With the Dremel 8100, you will never have to worry about downtimes because it runs on a powerful 8-volt Lithium-ion battery. This battery can hold charge up to 6 times longer than what you get with the regular NiCad batteries. The lithium-ion power pack has a 7.2 battery amp hour and a charge time of 1 hour which is what ensures that you never have lengthy downtimes.

#3. Ease of Use

If you are on the market for a rotary tool that is easy to use but still powerful enough, the Dremel 8100 is an excellent choice. This cordless tool is very versatile, and you can operate it from almost any position without worrying about hand fatigue. Dremel also gives this rotary tool a comfort grip housing that makes it easy to handle while also providing better control.

The dimensions of this rotary tool are 8.5 inches (length) by 2.5 inches (width) by 2 inches (height) making it quite a compact unit. And it weighs about 0.9 kg making it a small and lightweight unit which also helps to make it easy to handle and very portable.

#4. Case Material

No matter how firm your hand might be rotary tools are still prone to accidental falls just like most other handheld power tools. Dremel understands this, and so they try to minimize damages to the power tool in case of falls by giving it a sturdy and high-density composite construction. Apart from keeping the essential components of the Dremel 8100 rotary tool safe from drops and accidental bumps into things, the composite case also helps to make it a very long-lasting power tool.

#5. Other Features

Dremel is not an industry leader in the manufacture of rotary tools by chance because they always try to make their tools as efficient, easy to use and convenient as possible. One of the features that help with this is the EZ Twist nose cap that makes the attachments or accessories changing fast. Also, Dremel backs this fantastic tool with a 2-year warranty to give you some assurance that you are making the best decision and have nothing to lose by buying the Dremel 8100.


The Dremel 8100-N/21 is a 21-accesory rotary tool, and it comes with more accessories and attachments than most other units. Also, Dremel provides accessories for various uses to make this a versatile and multipurpose power tool.

  • This rotary tool comes with three 540 1 1/4-inch cut-off wheels to make it possible for you to cut different materials. These wheels can cut into almost anything including wood, metal, and stone.
  • Dremel 8100 is also a handy tool when it comes to grinding and sharpening which is thanks to the 932 and 952 grinding stones (aluminum oxide) and the fantastic 84922 grinding stone (silicon carbide).
  • For polishing and cleaning applications Dremel provides a total of 4 attachments and accessories that include 2 414 (felt) polishing wheels and the handy 403 polishing brush that you can use for various things.
  • This rotary tool kit comes with more sanding accessories than what you get from most other rotary tools on the market hence making it one of the best for sanding applications. These accessories include 3 432 1/2-inch sanding band (120-grit) and a couple of 240 grit 445 1/2-inch sanding band.

What This Kit Can Do

The cordless Dremel 8100 is a versatile and multipurpose rotary tool that will come in handy for almost all your DIY projects in the workshop or at home. You can use this power tool for the following 4 and many other applications.

#1. Grinding, Sanding and Sharpening

With the help of the 3 different types of grinding stones that come with this rotary tool, you can grind or sharpen metals appliances like blades for your mowers or even your garden hoes and forks. Also, these stones make it possible to grind and sharpen non-ferrous materials like glass, stone, and ceramics.

Whether you are finishing up a woodworking project or you want to restore your wooden furniture, you will require some sanding tools, and for this, the Dremel 8100 rotary tool will be very handy.

#2. Cutting

There is always something to cut when doing DIY projects or even some routine maintenance around the home. The versatility of the Dremel 8100 allows you to cut almost any material that you want. Whether you want to cut off some troublesome screws, concrete or small boards and wood this tool has the right accessories for the job.

#3. Engraving and Carving

Carving and engraving are always an important part of finishing projects. But whether you are carving into a soft material or hard one this rotary tool comes with the right attachments for both. The high-speed cutters and tungsten carbide cutters will help you with everything from hollowing to smoothing and shaping material.

#4. Polishing and Cleaning

With the Dremel 8100, you can quickly put a sparkle on your projects without putting in a lot of effort. The 4 polishing/cleaning accessories that include a bristle brush will handle anything from hard removal of material to minor finish cleaning.


Dremel 8100-N/21 is a unique cordless rotary tool that can handle almost any task. Whether you want to cut some metal in the workshop or polish/clean your projects for a perfect finish, this power tool will be very helpful. But the best thing about it is that it almost has no downtime thanks to the long-lasting battery (lithium-ion) that will last for up to 6 times longer than NiCad ones and the 1-hour charger.

Despite the impressive features and performance, this rotary tool is also very affordable and easy to use. Most people will not even need to read the manual when using it for the first time since everything is straightforward. And with a 2-year warranty to back it up, you can be confident that you are making a worthy investment by going for the Dremel 8100.

Last Updated on August 7, 2020 by Tom Bradly

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Tom Bradly

My entrepreneurial journey started in 2006, when I dropped out of university. I wanted to work with my hands, to build things. Now I mix my background with computers with my first-hand experience with woodworking to provide insights into the tools I like best. I love everything about woodworking and have been building stuff for over 20 years of my life. I hope to pass some knowledge and expertise. See more at TomBradly.com

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