The Dremel 8240-5 is a 12V cordless rotary tool with a removable 2Ah lithium-ion battery pack and dedicated charger, delivering variable speed and substantial power for a wide range of DIY, crafting, and light professional tasks. Using a brushed motor, the 8240 provides robust performance at a more accessible price than the brushless 8250. The comfort grip design and 12V power make it a capable workshop-to-jobsite tool. The kit includes a 2Ah battery, charger, and 5 accessories.
What is the difference between the Dremel 8240 and the Dremel 8250?
Both are 12V cordless rotary tools with removable battery packs. The key difference is the motor: the 8250 has a brushless motor, which provides better efficiency, longer runtime per charge, and greater longevity. The 8240 uses a brushed motor and is typically less expensive. For occasional users, the 8240 is a solid choice; for frequent or heavy use, the 8250's brushless advantage makes it worth the premium.
Is the Dremel 8240's battery compatible with other Dremel tools?
No. Dremel batteries are not cross-compatible between voltage families. The 8240's 12V battery fits the 8240 and 8250 series but does not work with the 4V 7350/7760 or 8V 8150 tools.
Can the Dremel 8240 handle heavy cutting tasks?
The 8240 handles moderate cutting tasks well — cut-off wheels, spiral cutting bits, and carbide bits for wood, plastic, and thin metals. For sustained heavy cutting on hard materials, the corded 4300 is preferred since it provides unlimited runtime and consistent power.
How long does the 8240 battery last?
Runtime depends heavily on speed setting and load. At moderate speeds on light tasks, users typically get 30–60 minutes per charge. The advantage over integrated-battery tools is that you can swap in a second 12V battery (sold separately) for uninterrupted use.
Does the Dremel 8240 come with a charger?
Yes. The 8240-5 kit includes the rotary tool, a 2Ah battery pack, a dedicated 12V charger, 5 accessories, and a fabric carry bag.
Is the Dremel 8240 good for engraving and detail work?
Yes. The variable speed control and standard collet system make the 8240 capable of engraving, carving, and detail work. The cordless format is especially convenient for decorating items that are awkward to bring to a corded workstation. The 8250's brushless motor provides smoother operation at low speeds for finer detail work.
# Dremel 8240-5 12V Cordless Variable Speed Rotary Tool Kit with 2Ah Battery, Charger, and 5 Accessories **Model:** `8240-5` **Brand:** Dremel **Category:** Rotary Tool > The Dremel 8240-5 is a 12V cordless rotary tool with a removable 2Ah lithium-ion battery pack and dedicated charger, delivering variable speed and substantial power for a wide range of DIY, crafting, and light professional tasks. Using a brushed motor, the 8240 provides robust performance at a more accessible price than the brushless 8250. The comfort grip design and 12V power make it a capable workshop-to-jobsite tool. The kit includes a 2Ah battery, charger, and 5 accessories. ## Specifications | Attribute | Value | |---|---| | Product Type | Rotary Tool | | Power Source | cordless-battery | | Battery Voltage V | 12 | | Battery Ah | 2 | | No-Load Speed (RPM) | 5,000-35,000 | | Variable Speed | Yes | | Collet Size In | 1/8 | | Chuck Type | standard collet | | Brushless | No | | Electronic Feedback | No | | Pivot Light | No | | Ez Twist | No | | Replaceable Brushes | No | | Attachments Count | 0 | | Accessories Count | 5 | | Warranty | 2-year limited | ## What's Included - 8240 rotary tool - B816-01 12V 2Ah lithium-ion battery - 12V charger - 402 screw mandrel (1) - 426 cut-off wheel (1) - 407 1/2" sanding drum (1) - 408 sanding band 60-grit (1) - 432 sanding disc 120-grit (1) - fabric carry bag Source: https://www.jaspecs.com/dremel/rotary-tool/8240-5-dremel-12v-cordless-brushed-rotary-tool-kit-5-accessories/