Drill bit Makita D-70334 8 mm diameter 600 mm length

The Makita D-70334 8 mm diameter 600 mm length drill bit is a long-reach bit engineered for drilling tasks that require extended depth and straightness. Constructed to provide consistent performance across a range of common materials, this 8 mm by 600 mm drill bit is suitable for situations where a standard-length bit cannot reach or where a precise, stable hole is required. The design balances rigidity with manageable flexibility to help maintain drilling accuracy over the full 600 mm length.

Advantages

The extended 600 mm length allows access to deep or hard-to-reach areas without the need for extensions or multiple passes. Its 8 mm diameter ensures compatibility with a wide range of fasteners and dowels commonly used in construction and installation tasks. The bit's construction focuses on wear resistance and twist stability to reduce wandering and provide repeatable hole quality. Its compatibility with standard drill chucks and holders offers straightforward integration into existing tool setups.

Suitable for

• Drilling deep holes in wood, soft metals, and plastics where a long reach is required
• Installing long anchor bolts, dowels, or sleeves in walls or beams
• Accessing recessed or obstructed drilling points in cabinetry and joinery
• Professional and DIY tasks requiring precise, straight holes at depth

Key specifications

• Diameter: 8 mm
• Overall length: 600 mm
• Shank compatibility: standard drill chucks (check chuck capacity for 8 mm shank)
• Intended materials: wood, selected plastics, soft metals (use appropriate speed and feed)
• Design focus: long-reach geometry for reduced deflection and improved straightness

How to use

Secure the drill bit in a compatible drill chuck, ensuring the 8 mm shank is clamped tightly and concentric. Select drilling speed and feed appropriate to the material—lower speeds for metals and higher speeds for wood—while applying steady pressure. When drilling deep holes, periodically withdraw the bit to clear chips and reduce heat buildup. Use appropriate cutting fluid or lubrication for metal work and ensure the workpiece is properly supported and clamped to prevent movement.

Usage recommendations

Verify that the drill chuck can accept an 8 mm shank and that the drill’s maximum recommended speed is appropriate for the target material. For long-reach drilling, support the drill and workpiece to minimize bending of the bit. When working with masonry or very hard materials, choose a drill bit specifically rated for those substrates.