Import BDNA--22448-1 Jobber Drill Bit 27/64 in Hss

Product Description

The IMPORT BDNA--22448-1 is a jobber length drill bit designed for general-purpose drilling in metal, wood, and plastic. It is manufactured from high speed steel with an oxide/gold coating that helps resist wear and reduce friction during cutting. The bit measures 27/64 inch (0.4219 inch decimal) in diameter with an overall length of 5-3/8 inches and a flute length of 3-15/16 inches. A 118-degree split point reduces walking on contact and allows drilling to begin without a center punch in many applications. The straight-cylindrical shank measures 3/8 inch in diameter, making it compatible with standard three-jaw drill chucks.

This bit is suited for maintenance, fabrication, and trade service work where a reliable general-purpose drill bit is needed. The right-hand spiral flute and web-thinned, tapered web configuration support efficient chip evacuation during through-hole drilling. It is a common size for HVAC, plumbing, and electrical rough-in work where 27/64 inch clearance holes are required for fasteners, conduit anchors, or pipe hangers. The bit is sold individually and is appropriate for use in standard corded or cordless drill drivers and drill presses.

Key Features

• 27/64 inch diameter (0.4219 inch decimal) for precise hole sizing
• 118-degree split point reduces bit walk and lowers required thrust force
• Oxide/gold coating increases surface hardness and extends cutting life
• Web-thinned tapered web improves chip flow and reduces heat buildup
• Right-hand regular spiral flute for standard through-hole drilling
• Straight-cylindrical 3/8 inch shank fits standard three-jaw drill chucks

Compatibility

Designed as a general-purpose jobber length drill bit suitable for use in standard three-jaw drill chucks accepting a 3/8 inch straight-cylindrical shank, including corded drill drivers, cordless drill drivers, and benchtop drill presses.

Installation Notes

Secure the shank firmly in the drill chuck before use and verify the chuck key is removed before powering on. Use appropriate cutting fluid or lubricant when drilling ferrous metals to reduce heat and extend bit life. Allow the bit to cool between successive holes in hard materials to avoid premature edge wear. Wear appropriate eye protection in accordance with applicable job site safety requirements.