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⚡ Unleash your DIY genius—power, precision, and portability in one sleek tool!
The Dremel 8240-5 is a compact, cordless rotary tool powered by a 12V/2AH lithium-ion battery offering up to 2 hours of runtime. With variable speeds from 5,000 to 35,000 RPM and a patented EZ Twist Nose Cap for quick accessory changes, it delivers professional-grade performance in a portable design. Its ergonomic 360-degree grip and compatibility with all Dremel accessories make it the ultimate versatile tool for detailed home improvement, crafting, and repair projects.


























| ASIN | B09SKFVSMZ |
| Battery Average Life | 2 hours |
| Best Sellers Rank | #4,280 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #8 in Power Rotary Tools |
| Brand | Dremel |
| Brand Name | Dremel |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 2,353 Reviews |
| Included Components | 8240, B815-01 2.0Ah battery, GAL12V-20 charger and 5 accessories |
| Item Dimensions | 9.98 x 2 x 2.38 inches |
| Item Highlight | Comfort Grip, Variable Speed, Includes 2AH Battery Pack, Charger, 5 Rotary Tool Accessories, Wrench & Carry Bag |
| Item Type Name | Rotary Tools |
| Item Weight | 1.5 pounds |
| Manufacturer | Dremel |
| Manufacturer Part Number | 8240-5 |
| Manufacturer Warranty Description | Limited 2 Years |
| Maximum Rotational Speed | 35000 rpm |
| Minimum Speed | 5000 rpm |
| Model Number | 8240-5 |
| Number of Batteries | 1 Lithium Ion batteries required. (included) |
| Number of Items | 1 |
| Other Special Features of the Product | Compact, Cordless, Variable Speed |
| Power Source | Battery Powered |
| Recommended Uses For Product | Deburring, Grinding, Polishing, Sanding |
| Special Feature | Compact, Cordless, Variable Speed |
| Style Name | Industrial |
| UPC | 080596057336 |
| Unit Count | 1 Count |
| Voltage | 12 volts |
1**E
Why did it take me so long??
First time purchasing a CORDLESS Dremel - have 3 older corded. I have to say this was a smart choice. So much power! I’m taking my time working up to full throttle 😅 and the battery is still more than half after three separate uses with just one charge! Extremely versatile (slices through pvc lattice like butter). Great quality and weight for short or long work sessions. Noise is minimal and will vary somewhat in relation to power level and duration of use. The only thing I could ask for is a slightly better body. I have big hands (6’ woman) and it is a bit thick around the middle- not unreasonably so - just asking for a little better ergonomics when holding, like a slightly deeper pinch nearer the head for when a detail grip is desired ( I get that there has to be room for the battery to insert and yes, I own the grip attachment - not a favorite of mine). Otherwise, it is simply everything one would expect from the Dremel brand - including an excellent price. By the way, the original Dremel in my toolbox is at least 15 years old and still performs admirably within it’s abilities. Upgrading to cordless, though? Wow. Awesome! This was an actual purchase and I was not paid for the review.
S**H
Dremel 8240
This drill brand it's good for making no heavy work small jobs works very well to making details on wood or soft metals The battery doesn't heat up and lasts a good while, provided it isn't subjected to heavy-duty work; I do recommend it.
J**.
Picked during Prime Deals and have no regret.
IMPORTANT! If your tool is flashing green when it is turned on, set it 10 to 15k and try again. Toggle on and if it still flashes try again. Now to the review. This is a great tool. It's got plenty of power and can SAND through a board. Not just cut. With a SANDING DRUM you can go through a board. It doesn't bog easily above 10krpm. It is great for cutting bolts, cutting sheet metal, sanding metal and wood, rough and fine shaping in wood. Fine shaping in aluminum, polishing steel, rough axe or lawn blade sharpening, engraving, and much more I haven't done yet. The battery life is good, but it leaves some to be desired. It can be gripped like a golf club for grinding, and shaping, or like a pencil for fine and detailed work. The battery charges in 30 to 40 minutes. It is quite heavy, but not enough to stop most detailed work. I can't say much about durability, as I've only had it for a week, but I've got it covered on sawdust, metal dust and splashed with water lightly. This is a brushed tool, but there is not a way to change brushes, so I guess you replace it. Fine with me for 70$, but might be a deal breaker for some to replace every 150 hours. It is a great starter dremel though. You will have to buy a lot more accessories to fuel your rotary addiction, but at this price it's pretty easy to. The carrying case is a huge bonus. It fits my 110 piece accessory kit with the charger, tool and battery. I overall, a great buy.
A**R
Beast!
Bought this to trim my dogs nails after purchasing other trimmers I decided to try this Dremel and it is the best! Gets the job done quick with less hassle. Not sure but my guess would be this is what the professionals use. Don’t waste your time with the other nail trimmers. I wish I had purchased this from the start.
J**E
Highly recommend
Works great and as expected! Battery lasts surprisingly long. Carrying case is a great bonus! Highly recommend!
O**N
Very High-quality tool, everything you'd expect from a Dremel.
There's a reason the name brand is synonymous for the rotary tool, they make first class rugged quality tools that are the best at what they do. The device is easy to use, switching out tools is intuitive and simple. The battery life is surprising for its small size and the power output this Dremel is capable of. I would stipulate that this is not a beginner Dremel, you've got to really know how to use a rotary tool already for this, it does not come with labels or instructions for the different tools. I would personally also like to have seen more cutting discs included and some other grinding and sanding heads as the selection is fairly basic, you should plan to purchase the additional tool set with this. That being said, it made short work of the galvanized steel aircraft latch I needed to alter and later in the day I was able to use one of the cutting disks to alter some Warhammer models. The tool isn't too heavy and can be used easily for detail work, however it is a bit long and bulky if you need to get in a really small space. It is far easier to use than a corded version, however. Overall, I would highly recommend this tool for nearly any application, you really do not need a more powerful Dremel unless you are planning on a long-term professional jobsite with a really high-power demand.
M**E
Fast
Fast and nice
B**T
Return Process is straight forward and effortless
This might be premature in writing this review. As soon as I received my dremel this afternoon I set up the charger and charged the battery until the blinking light stopped and the green light was a steady light. Inserted the battery into the butt of the dremel and pushed the on/off switch to on. Immediately three blinking green lights start to flash and after 1-2 seconds it goes off. I pushed the on/off switch again...Nothing. I pulled the battery out of the socket and reinserted, again... Nothing. Do I have a bad product? So that leaves me with 1-2 options now; return the product to Amazon or call Support. Guess I'll sleep on it tonight and decide what to do....So right now, since it doesn't turn on at all I really can't rate it over 1 star. Second Day...tried the Dremel again this morning and NOTHING. I'm leaning toward returning the tool, in the meantime I'll keep trying the On/Off Switch. Was looking forward to using the grinder on several projects. Guess it has to wait. Update: I returned the Dremel which is always an easy process for me. After I informed Amazon of the problem and completed the questionnaire they informed me another Dremel will be shipped and I have about 30 days to shipped the original item back. This is a big PLUS for me when the return process is above board and straight forward. I received the replacement and I made sure it worked. Yes, it is a disappointment whenever you receive a defective product, but I do understand minor problems as such do occur. In the meantime I'll continue to purchase items from Amazon.
J**P
Dremel always amazing
Great tool to use. A bit bulky but 12v supply with 35000rpm still available its worth it. However keep in mind that Amazon US supplies at 110V so make sure when ordering. I am still looking for a replacement charger to get the battery charged it is so upsetting......
S**D
A good buy.
Very solid and works as advertised. A nice tool that suits my needs.
M**I
110V يجب شراء محول منفصل
ممتاز جدا جودة عاليه العيب الوحيد الشاحن 110V
E**O
Excelente desempeño de sus funciones
Excelente desempeño, es justo lo que ofrece la marca y lo recomiendo.
A**A
ناقص بطارية
جائني مستخدم وبدون بطارية
Trustpilot
3 days ago
1 month ago