DEDRA Mini Grinder 3.6V Cordless Rotary Tool with 40 Accessories

With a no-load speed range of 5000–25000 RPM and a 3.6V Li-Ion battery, this DEDRA mini grinder delivers cordless precision for grinding, polishing, drilling, cutting, and engraving. The variable speed dial and spindle lock allow quick accessory changes and controlled operation.

Overview

The DEDRA DED7940Z1 is a compact, lightweight rotary tool powered by a 3.6V 1.3Ah Li-Ion battery. It includes a 40-piece accessory set covering grinding stones, sanding bands, cutting discs, drill bits, and polishing wheels. The integrated LED light illuminates the work area, while the soft-grip housing ensures comfortable handling during extended use.

What stands out

• Variable speed from 5000 to 25000 RPM for delicate to aggressive tasks
• 40-piece accessory kit for grinding, cutting, polishing, drilling, and engraving
• Spindle lock for fast and secure bit changes
• Built-in LED work light for improved visibility
• Soft grip body reduces fatigue and improves control
• Overload protection safeguards the motor and battery

Technical details

• Voltage: 3.6V DC
• Battery type: Li-Ion
• Battery capacity: 1.3 Ah
• No-load speed: 5000–25000 RPM
• Collet diameter: 3.2 mm
• Charging time: approx. 3–5 hours
• Charger input: 230V AC, 50Hz
• Charger output: 5V DC / 300mA
• Motor type: Brushed
• Accessories included: 40 pieces

Our verdict

A versatile cordless rotary tool ideal for hobbyists and light-duty professional work. The generous accessory set and variable speed make it ready for a wide range of materials, from wood and plastic to soft metals and ceramics.