Angle grinder DeWalt DCG409VSNT-XJ 18V cordless, 125 mm disc, brushless, 6-speed, 5 Ah battery compatible

The DeWALT DCG409VSNT-XJ is a battery-powered angle grinder equipped with a brushless motor and designed for mobile grinding and cutting tasks. It accepts a 125 mm (12.5 cm) grinding disc and operates across a variable idle speed range from 3,000 to 9,000 RPM, enabling control over material removal and finish. Powered by an 18 V lithium‑ion battery system, the tool combines cordless convenience with sustained performance and a compact black and yellow housing for professional jobsite use.

Advantages

The brushless motor improves energy efficiency and reduces maintenance compared with brushed designs, extending runtime per battery charge. A wide no-load speed range allows the user to match speed to material and application, from aggressive grinding to finer finishing. The cordless design delivers portability and eliminates the need for extension cables, while the 125 mm disc size offers a balance between reach and maneuverability. The DeWALT build provides a robust housing and straightforward controls for consistent operation.

Suitable for

• Grinding and shaping metal components
• Removing rust or paint from metal surfaces
• Cutting metal pipes, rebar and sheet metal
• Sanding and surface preparation with compatible accessories
• On-site work where cordless portability is required

Key specifications

• Disc diameter: 125 mm (12.5 cm)
• Motor type: brushless
• Power source: 18 V lithium‑ion battery
• No-load speed: 3,000–9,000 RPM
• Colour: yellow and black

How to use

Fit a compatible 125 mm disc and ensure the guard and handle are correctly positioned before operation. Install a charged 18 V battery and select an appropriate speed within the 3,000–9,000 RPM range for the material and task. Hold the tool with both hands, maintain a steady feed rate and avoid applying excessive pressure that can overload the motor or overheat the disc. After use, allow the tool to come to a complete stop, remove the battery for storage or transport, and inspect the disc for wear or damage.

Usage recommendations

Use personal protective equipment including eye and hearing protection and gloves. Choose the correct disc type and grit for the specific application, and follow the disc manufacturer's maximum speed rating. For prolonged work, rotate batteries to maintain consistent performance and avoid running the tool until complete battery depletion to prolong battery life.