Import BDNA-C105416 Extra Length Drill Bit 1/4 in Hss

Product Description

The IMPORT BDNA-C105416 is a high-speed steel extra length drill bit designed for deep-hole drilling applications where standard-length bits cannot reach. With a 1/4-inch diameter, a 12-inch overall length, and a 9-inch spiral flute, this bit provides extended reach without sacrificing chip clearance or cut quality. The 118-degree standard point angle suits a wide range of metals and general-purpose materials. An oxide finish provides basic lubricity and corrosion resistance. The web-thinned, tapered web design reduces thrust and improves centering at entry. Installed by machinists, maintenance technicians, and trade professionals working with deep assemblies or stacked materials.

This extra length drill bit is suited for general-purpose drilling in metalworking, fabrication, and maintenance applications where standard-length bits fall short. The straight-cylindrical shank fits conventional drill chucks without adapters, making it compatible with handheld drills, drill presses, and mill setups. Right-hand cutting direction is standard for typical clockwise-rotation equipment. The 2-flute spiral configuration provides efficient chip evacuation in through-hole and blind-hole drilling scenarios.

Key Features

• 1/4-inch diameter with 12-inch overall length for deep-reach applications
• 9-inch flute length promotes chip evacuation over extended drilling depth
• 118-degree standard point angle for general-purpose metal and material drilling
• High-speed steel construction withstands heat generated during prolonged cuts
• Web-thinned tapered web reduces entry thrust and improves bit centering
• Oxide finish adds basic lubricity and surface protection

Compatibility

Designed as a general-purpose extra length drill bit compatible with standard drill chucks accepting straight-cylindrical shanks in handheld, drill press, and milling machine setups.

Installation Notes

Secure the straight-cylindrical shank firmly in the chuck before operation and verify there is no runout before beginning a cut. Use appropriate cutting fluid or coolant for metal drilling to extend bit life, noting that this bit does not support coolant-through delivery. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed, as a dull bit increases thrust and raises the risk of workpiece damage or bit breakage.