1 / 7Dremel 8240-5 12V Cordless Variable-Speed Rotary Tool Kit
Variable-Speed: The Dremel 8240-5 cordless rotary tool pairs a listed 12-volt battery configuration with variable speed and a grip designed for control. It is presented for cutting, sanding, grinding and sharpening, but the listing disagrees on the speed range and accessory count, so confirm the selected kit’s specifications and contents.
At a glance
- Cordless design is specified for cutting, sanding, grinding and sharpening tasks.
- A variable-speed dial is described with a stated operating range of 5,000-35,000 RPM.
- An LED indicator is described as showing remaining battery life.
- The EZ Twist nose cap is intended to help change accessories without using a separate wrench.
- A 360-degree grip zone is claimed to support handling and control.
Reference price: $129.99
Price checked: Nov 13, 2026
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Pros and cons
Pros
- Cordless 12-volt operation avoids a power cord at the workpiece.
- The listing names several practical rotary-tool uses and describes speed adjustment for control.
- Battery indicator and integrated accessory-change feature can simplify routine use.
Technical specifications
16 specifications| Brand | Dremel |
|---|---|
| Model | 8240-5 |
| Power configuration | Battery Powered |
|---|---|
| Voltage | 12 volts |
| Battery capacity | 2 AH |
| Battery type | Lithium-Ion |
| Speed range | 5,000-35,000 RPM |
|---|---|
| Maximum rotational speed | 5000 rpm |
| Dimensions listed | 25.3 x 5.1 x 6 centimetres |
|---|---|
| Weight listed | 662 g |
| Recommended uses | Cutting, Sanding, Grinding, Sharpening |
|---|---|
| Special features listed | Compact, Cordless, Por, Variable Speed |
| Colour | Black |
| Style | Pencil |
| Battery count | 1 Lithium Ion batteries required. (included) |
|---|---|
| Charger charge time | 65-minute charge time |
What to know before buying
Listing details to confirm
Listing details are inconsistent: one speed claim gives 5,000-35,000 RPM, while the maximum and minimum fields both say 5000 rpm. The title claims five accessories, a feature line says five, and the included-components field lists six. Confirm the speed specification and exact kit contents for the selected listing.
What’s in the box
- Cordless rotary toolIncluded
- 6 rotary tool accessoriesCheck selected pack
- Accessory storage caseIncluded
- 12V 2.0Ah battery packIncluded
- Power adapterIncluded
- Fabric tool storage caseCheck selected pack
- Instruction manualIncluded
Check which accessories are included in your selected pack before buying.
Who is it for?
A good fit for
- DIYers and hobbyists looking for a cordless rotary tool for cutting, sanding, grinding or sharpening.
- Buyers who want variable speed, a battery-life indicator and a grip designed for handling.
Less suited to
- Buyers who need a confirmed speed range or a precisely verified accessory bundle before purchase.
- People seeking a corded rotary tool, since this kit is described as battery powered.
Customer reviews on Amazon
- 5 stars
71% 71% - 4 stars
13% 13% - 3 stars
4% 4% - 2 stars
2% 2% - 1 star
10% 10%
Customer feedback describes the tool as useful and capable, with reported satisfaction around battery performance and adequate power. Compatibility concerns are also reported, and ease of use is mixed. For buyers considering the listed cordless, variable-speed setup, those reports make accessory fit and handling worth weighing alongside the kit’s stated uses. Ratings are mostly in the top categories, but a notable one-star share means overall feedback is not uniformly positive.
Positive themes
- Customers report useful performance, adequate power and satisfactory battery life.
Negative themes
- Compatibility concerns are reported.
Mixed feedback
- Ease of use receives mixed feedback.
Frequently asked questions
What jobs is the Dremel 8240-5 intended for?
The listing recommends it for cutting, sanding, grinding and sharpening. The product description also mentions applications such as engraving, polishing, carving and woodworking.
What speed range does it have?
A feature claim states 5,000-35,000 RPM, but the separate maximum and minimum speed entries both state 5000 rpm. Confirm the speed details with the selected listing.
What comes in the kit?
The included-components field lists the tool, six rotary accessories, an accessory storage case, a 12V 2.0Ah battery pack, a GAL12V-20 charger, a fabric tool storage case and an instruction manual. Other listing text claims five accessories, so verify the bundle before buying.
Does it include a battery and charger?
The listing identifies one included lithium-ion battery and names a 12V 2.0Ah battery pack and GAL12V-20 charger in the components list.
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