Dremel 8240-5 Cordless Rotary Tool Kit - 12V High-Performance Multi-Tool with 2.0Ah Battery, Charger, and 5 High-Quality Accessories (F0138240JA)

Professional Power, Cordless Freedom

 

Unlock your full creative and repair potential with the Dremel 8240 Cordless Rotary Tool. Engineered to deliver the same high-performance power as the corded Dremel 4250, the 8240 gives you the freedom to work anywhere—from the workshop to the garden—without being tethered to a socket. Its robust 12V, 2.0Ah lithium-ion battery provides impressive runtime, while the advanced internal cooling system ensures the tool remains comfortable to handle during extended DIY sessions.

Designed with precision and safety in mind, the Dremel 8240 features a slim, ergonomic soft-grip body that fits perfectly in your hand. The intuitive variable speed control is strategically placed for easy thumb adjustment, and the integrated motor-brake stops rotation immediately upon power-off for maximum control. Whether you are cutting metal, sanding wood, or polishing intricate details, the 8240 is the ultimate portable powerhouse for high-performance crafting and maintenance.

 

Key Features

• Corded Performance, Cordless Convenience: Matches the power output of the Dremel 4250 for heavy-duty applications.

• Advanced Ergonomics: Slim body with soft-grip zones and optimized button placement for reduced fatigue.

• 12V 2.0Ah Power: High-capacity battery compatible with both Dremel and Bosch Professional 12V charging systems.

• Variable Speed (5,000 – 35,000 RPM): Precise control for a wide variety of materials and accessory types.

• Integrated Motor-Brake: Enhances safety by stopping the tool's rotation instantly when turned off.

• LED Battery Indicator: Provides clear, real-time feedback on the remaining charge level.

• EZ Twist™ Nose Cap: Allows for fast accessory changes without the need for a separate wrench.

 

Technical Specifications

• Voltage: 12.0 V

• Battery Capacity: 2.0 Ah

• No Load Speed: 5,000 – 35,000 RPM

• Weight: 660 g

• Dimensions: 254 mm (L) x 54 mm (W) x 45 mm (D)

• Charging Time: 65 minutes (1.05 h)

• Battery Technology: Lithium-Ion

 

What’s in the Box? (8240-5 Kit)

• 1 x Dremel 8240 Cordless Rotary Tool

• 1 x 12V 2.0Ah Lithium-Ion Battery

• 1 x 12V Charger

• 5 x High-Quality Dremel Accessories:

  • 1 x Mandrel (402)

  • 1 x Sanding Band & Mandrel 13 mm, 60 Grit (407)

  • 1 x Sanding Band 13 mm, 60 Grit (408)

  • 1 x Sanding Band 13 mm, 120 Grit (432)

  • 1 x Heavy Duty Cut-Off Wheel 32 mm (426)

• Accessory Information Sheet & User Manual

 

Ideal For

• Precision Cutting: Ideal for trimming bolts, piping, or small metal pieces using the included 426 cutting wheel.

• Sanding & Shaping: Perfect for smoothing rough edges on wood, plastic, or fiberglass.

• Detailed Engraving & Carving: (When used with compatible Dremel carving bits) Excellent for personalized woodworking or glass etching.

• Outdoor Maintenance: Portable enough for cleaning rust or sharpening garden tools far from a power outlet.

 

Frequently Asked Questions

1. Can I use my Bosch 12V batteries with this tool? Yes. The Dremel 8240 is part of the 12V system and is compatible with both Dremel 12V batteries and Bosch Professional 12V batteries and chargers.

2. How long does the battery last on a full charge? Runtime varies depending on the speed setting and the pressure applied. However, the 2.0Ah battery is optimized for long-duration tasks, and the LED indicators will alert you when it's time to recharge.

3. Does this tool support all Dremel attachments? Yes, the 8240 is compatible with the full range of Dremel attachments and accessories, including the Flex-Shaft, Detailer’s Grip, and Right Angle attachments.