Import BDNA-C105420 Extra Length Drill Bit 5/16 in Hss

Product Description

The IMPORT BDNA-C105420 is an extra length high-speed steel drill bit designed for through-hole and deep-hole drilling applications where standard-length bits cannot reach. Measuring 5/16 inch in diameter with a 12-inch overall length and a 9-inch spiral flute, this bit provides extended reach without sacrificing rigidity. The 118-degree standard point angle suits general-purpose drilling in a wide range of materials. An oxide finish reduces friction and helps resist corrosion during service. The web-thinned, tapered web construction reduces thrust and improves chip evacuation in deeper cuts.

This drill bit is suited for metalworking, fabrication, mechanical, and maintenance trades where access depth is a limiting factor. Common applications include drilling through structural members, deep castings, stacked material, and confined spaces in HVAC, plumbing, and electrical rough-in work. The straight-cylindrical shank seats directly into standard drill chucks without adapters, making it compatible with common corded and cordless drilling equipment found on most job sites.

Key Features

• Extra length design: 12-inch overall length with 9-inch flute for deep-reach drilling
• 5/16-inch diameter with 118-degree standard point for general-purpose use
• High-speed steel construction handles moderate heat and abrasion
• Oxide finish reduces friction and provides light corrosion resistance
• Web-thinned tapered web lowers thrust and improves chip clearing
• Right-hand cutting, 2-flute spiral configuration for efficient material removal

Compatibility

Designed as a general-purpose extra length drill bit compatible with any standard drill chuck accepting a straight-cylindrical shank in 5/16-inch diameter.

Installation Notes

This bit is installed and operated by machinists, pipefitters, electricians, and general tradespeople using standard corded or cordless drills and drill presses. Secure the straight-cylindrical shank fully in the chuck before use to prevent slippage. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and reduce heat buildup. Inspect the bit for wear or damage before each use and replace if the cutting edges are chipped or the flutes are clogged.