Cordless Multitool Dremel 8240-5/65 12V — battery powered rotary tool with 12V battery

Dremel 8240-5/65 is a cordless multitool powered by a 12V battery, designed for cutting, grinding, polishing and engraving. Supplied as model 8240-5/65 with a selection of accessories, it is compact and portable, offering variable-speed rotary operation for versatile use on wood, metal, plastics and other common materials. The tool’s cordless design and balanced ergonomics make it convenient for hobbyists, DIY enthusiasts and light professional tasks where mobility and precision are required.

Advantages

The cordless 12V motor provides a balance of power and runtime suitable for short to medium-duration jobs without trailing cables. Variable-speed control enables precise adjustment for delicate polishing or faster cutting operations. The kit includes a curated set of accessories that covers common applications such as cutting, grinding, sanding and polishing, reducing the need to purchase attachments separately. Compact form factor and lightweight design improve handling in confined spaces and for overhead work.

Suitable for

• Hobby and craft projects involving wood, plastic and soft metals
• Home repair tasks such as cutting small pipes, trimming materials and removing rust
• Detail sanding, polishing and finishing on furniture and models
• Engraving and etching on various surfaces for personalization
• Light professional jobs where portability and precision are important

Key specifications

• Power source: 12V rechargeable battery (cordless operation)
• Speed: variable rotary speed control for delicate to aggressive tasks
• Applications: cutting, grinding, sanding, polishing, engraving
• Compatibility: accepts standard Dremel-style rotary accessories
• Design: compact, lightweight and ergonomic housing for improved handling
• Accessories: supplied assortment for multiple common tasks (cutting wheels, sanding accessories, polishing bits, etc.)

How to use

Fit the appropriate accessory for the task and ensure it is secured following the manufacturer's tightening method. Select a low speed for delicate materials and fine finishing, and increase speed for cutting or aggressive material removal. Hold the tool with a steady grip and use controlled, light pressure to avoid overheating the accessory or the material. Recharge the battery before starting extended work and replace accessories as they wear to maintain performance and safety.

Recommendations

Use personal protective equipment such as safety glasses and gloves, and work in a well-ventilated area. For best results on metals and hard plastics, start with a medium speed and test on scrap material to determine the optimal speed and accessory. Store the tool and accessories in a dry place and follow battery charging guidelines to prolong battery life.