Wood auger bit GEKO model G37408, 12 x 460 mm, threaded drill 25/50 pack

GEKO wood auger bit G37408, 12 x 460 mm, is a spiral auger drill designed to produce deep, clean holes in timber. The 12 mm cutting diameter and 460 mm overall length make this bit suitable for through-holes and deep boring in solid wood, beams and posts. Its threaded tip pulls the bit into the workpiece for steady penetration and improved control during drilling. The bit is compatible with a manual brace and with power tools that accept threaded-shank auger bits when used with the appropriate adaptor.

Advantages

The threaded tip design reduces the need for excessive feed force by drawing the bit into the wood, helping to maintain alignment and reduce walking. The spiral flute efficiently evacuates chips from deep holes, minimising clogging and heat build-up. The long overall length provides reach for drilling through thick timbers, posts and stacked boards while the 12 mm diameter produces consistent, clean holes suitable for dowels, bolts or fasteners.

Suitable for

• Drilling deep through-holes and blind holes in solid timber and beams
• Preparing holes for bolts, dowels or threaded rods in carpentry and joinery
• Creating holes in fence posts, utility poles and structural members
• Use with a manual brace or compatible power adaptor for long-reach drilling

Key specifications

• Cutting diameter: 12 mm
• Overall length: 460 mm
• Threaded tip for self-feeding into wood
• Spiral flute design for chip evacuation
• Suitable for use in soft and hard wood

How to use

Place the point of the auger bit on the marked drilling location and start at low speed to ensure the thread engages and the bit pulls in without wandering. Apply steady axial pressure and maintain the drill or brace aligned with the intended hole axis. Withdraw the bit periodically when drilling deep holes to clear chips from the flute and allow cooling. For power-tool use, ensure the tool’s chuck or adaptor securely accepts the threaded shank before operation and follow the power tool manufacturer’s safety instructions.

Usage recommendations

Use cutting lubrication or periodic withdrawal when drilling very dense hardwoods to reduce heat and extend bit life; inspect the cutting edges before use and replace the bit if edges are worn or damaged to maintain hole quality.