Milwaukee 48-89-2306 Cobalt Drill Bit 9/64 in 5-pack

Product Description

The MILWAUKEE ELEC TOOL 48-89-2306 is a 9/64-inch cobalt twist drill bit sold in a 5-pack, engineered for demanding metal-cutting applications in professional trade and industrial environments. Built from cobalt alloy, the bit delivers superior heat resistance and core strength compared to standard high-speed steel options. A variable helix design transitions from an aggressive 35-degree helix angle down to 15 degrees, promoting efficient chip evacuation and reducing friction throughout the cut. The 135-degree split point tip starts on contact without a center punch, eliminating bit walk on hard or smooth surfaces. An enhanced tapered web reinforces the flute zone, extending service life in repetitive or high-cycle drilling tasks.

This drill bit is designed for licensed electricians, plumbers, ironworkers, HVAC technicians, and general contractors who regularly drill through stainless steel, hardened metals, PVC, and wood. The 5-pack format suits tool crib stocking, field kits, and high-volume job sites where bit replacement is routine. Its cobalt construction makes it especially practical for stainless steel work, where heat buildup quickly degrades standard black oxide bits. The manufacturer rates service life at up to 15 times longer than comparable black oxide drill bits under equivalent conditions.

Key Features

• Cobalt alloy construction provides superior heat resistance and strength for hard metal drilling
• Variable helix design transitions from 35 degrees to 15 degrees for efficient chip removal and reduced friction
• 135-degree split point tip starts on contact and prevents walking without a center punch
• Enhanced tapered web strengthens the bit core and increases flute durability
• Rated up to 15 times longer service life compared to standard black oxide drill bits
• Sold as a 5-pack for job site stocking and high-cycle use

Compatibility

Designed as an OEM-style cobalt twist drill bit compatible with standard 3-jaw drill chucks and drill presses accepting 9/64-inch round shanks, suitable for drilling hard metals, stainless steel, PVC, and wood.

Installation Notes

Installation of this drill bit is performed by the end user in any trade application requiring metal, PVC, or wood boring. Always power down and disconnect or de-energize the drill or drill press before changing bits. Use appropriate cutting fluid or lubricant when drilling stainless steel or hardened metals to manage heat and extend bit life. Wear ANSI-rated eye protection and secure the workpiece before drilling.