Spiral cutting drill bit Makita D-34039

The Makita D-34039 spiral cutting drill bit is a 2.5 cm diameter tool made for precision drilling tasks. It features a spiral flute geometry that promotes efficient chip evacuation and stable cutting action, producing clean holes with minimal burring. The bit is suitable for a range of common materials and designed to meet the needs of both trade professionals and home users seeking repeatable, accurate results.

Advantages

The spiral design improves cutting stability and reduces vibration during use, while the ground cutting edges deliver consistent hole quality. Its diameter and rigid shank provide reliable centering and reduced wander when starting a hole. The material and heat treatment provide wear resistance for extended use under normal working conditions.

Suitable for

• Drilling precise holes in wood
• General-purpose drilling in plastics and composite materials
• Light-duty metal drilling where a spiral geometry is appropriate
• Carpentry, cabinetry, and DIY repair projects

Key specifications

• Diameter: 2.5 cm
• Spiral/fluted cutting geometry for chip removal
• Material: hardened tool steel with heat treatment for wear resistance
• Shank type: straight shank compatible with standard chucks
• Intended use: precision drilling with reduced burring

How to use

Select a compatible drill or drill press and secure the bit in the chuck ensuring proper tightening. Mark the drilling position and, where appropriate, use a center punch to prevent walking. Start at low speed to establish the hole, then increase speed as required for the material. Apply steady, even pressure and allow the spiral flutes to evacuate chips; withdraw occasionally to clear chips when drilling deeper holes. After use, clean chips from the flutes and store the bit in a dry holder to protect the cutting edges.

Usage recommendations

Use cutting fluid or light lubrication when drilling metals to reduce heat buildup. Match drill speed to material hardness, use backing support for thin workpieces to avoid breakout, and inspect the cutting edges regularly—replace the bit when wear degrades hole quality.