Angle Grinder Makita DGA504RTJ

The Makita DGA504RTJ angle grinder is a battery-powered tool with a brushless motor designed for efficient grinding and cutting tasks. It uses an 18 V battery with 5 Ah capacity to provide extended runtime while keeping the tool compact and lightweight. The grinder accepts a 125 mm (12.5 cm) disc and reaches a no-load speed up to 8,500 RPM. With a tool weight of 2.5 kg and a narrow body (approximately 140 mm wide and 145 mm high), the model is engineered for improved handling and access in confined spaces. The sound pressure level of 79 dB supports use in environments where reduced noise is preferred.

Advantages

The brushless motor offers higher efficiency and reduced maintenance compared with brushed designs, contributing to longer motor life and better battery runtime. The 18 V / 5 Ah battery compatibility ensures extended work periods without frequent recharging, while the 125 mm disc size balances cutting and grinding capacity with operator control. The compact dimensions and 2.5 kg weight improve maneuverability for precision tasks. Low sound pressure helps reduce operator fatigue and makes the tool suitable for indoor or noise-sensitive job sites.

Suitable for

• Metal grinding and deburring
• Cutting metal pipes and profile sections
• Surface preparation before welding or painting
• Masonry cutting and light chipping tasks
• Workshop and on-site maintenance where cordless operation is required

Key specifications

• Motor type: Brushless (electronic commutation)
• Rated voltage: 18 V
• Battery capacity example: 5 Ah (battery sold separately or as part of kit)
• Disc diameter: 125 mm (12.5 cm)
• No-load speed: up to 8,500 RPM
• Weight: 2.5 kg
• Dimensions (approx.): 140 mm width × 145 mm height
• Sound pressure level: 79 dB
• Colour: Blue and Black

How to use

Before use, install a compatible 125 mm grinding or cutting disc and ensure the 18 V battery is fully charged and correctly fitted according to the battery and tool manufacturer instructions. Hold the grinder with both hands, maintain a firm grip on the auxiliary handle for control, and position the guard to direct sparks away from the operator. Start the tool and allow it to reach full speed before contacting the workpiece. Apply steady, moderate pressure; avoid forcing the disc. After finishing, release the trigger, wait for the wheel to stop completely, and remove the battery before changing discs or performing maintenance.

Usage recommendations

Use appropriate personal protective equipment including safety glasses, hearing protection, and gloves. Select discs rated for the tool's maximum speed and suitable for the material and task. For longer battery life, use the recommended 5 Ah or higher capacity batteries and follow charging best practices. Keep vents clear of dust and periodically inspect the tool, guard, and disc for wear or damage.