Drill bit GRAPHITE 18 mm spiral wood hex shank (57H257)

GRAPHITE spiral wood drill bit, 18 mm diameter with a hexagonal shank, is made for drilling precise, clean holes in timber and common wood-based materials. The spiral flute evacuates chips effectively to maintain a stable drilling action and reduce clogging, while the hex shank offers reliable engagement with chucks and quick-change holders. Designed for use with hand drills and cordless drivers, this bit suits carpentry, joinery and general construction tasks where accuracy and chip removal are important.

Advantages

The spiral flute geometry provides continuous chip removal and helps produce smooth hole walls. The 18 mm diameter offers a balance between hole size and control for many woodworking tasks. The hex shank ensures a secure grip in standard chucks and quick-change adapters, reducing slippage during higher-torque operations. The bit’s construction is optimized for timber and typical engineered wood, enabling consistent drilling performance in through-holes and stop-holes.

Suitable for

• Drilling clean holes in soft and hardwoods
• Carpentry and joinery work
• On-site construction and renovation tasks
• Installation of dowels, conduits, and fasteners
• Use with hand drills and cordless drivers

Key specifications

• Diameter: 18 mm
• Tip and flute type: spiral flute for chip removal
• Shank type: hexagonal shank for secure grip
• Intended material: timber and common wood-based materials
• Compatible tools: hand drills and cordless drivers with hex shank acceptance

How to use

Mark the drilling point and secure the workpiece to prevent movement. Select an appropriate rotation speed for the wood species and drill steadily without excessive pressure to allow the spiral flute to evacuate chips. Fit the hex shank into the drill chuck or quick-change adapter ensuring it is fully seated. For deeper holes, withdraw the bit periodically to clear chips and prevent overheating. After use, clean the flute and store the bit in a protective holder to maintain cutting efficiency.

Usage recommendations

Use moderate drill speeds for hardwoods and higher speeds for softwoods, and consider pilot holes for precise alignment when installing dowels or fasteners. Keep the bit sharp and free of resin build-up to ensure consistent hole quality.