Milwaukee 48-89-2308 Cobalt Drill Bit 11/64 in 5-pack

Product Description

The Milwaukee Electric Tool Corp 48-89-2308 is a cobalt drill bit designed for demanding metal drilling applications where standard high-speed steel bits fall short. At 11/64 inches in diameter, this bit uses a RED HELIX geometry that promotes faster chip ejection and reduced heat buildup during extended drilling cycles. The cobalt construction provides increased hardness and heat resistance compared to standard HSS bits, making it suitable for stainless steel, cast iron, and other hard ferrous metals. Each package contains 5 bits, providing working stock for busy service trucks and shop environments. Trade professionals across mechanical, plumbing, and electrical disciplines keep these on hand for everyday metal fabrication and equipment installation tasks.

This cobalt drill bit is suited for drilling through hard metals encountered in commercial and residential installation work, including sheet metal, structural steel, and hardware. The 11/64 inch diameter is a commonly used size for pilot holes, clearance holes, and fastener preparation in light to medium gauge metal stock. The 5-piece pack format supports job-site use where bit replacement is a routine part of workflow rather than an exception.

Key Features

• Cobalt construction for increased hardness and heat resistance in hard-metal drilling
• RED HELIX geometry promotes efficient chip evacuation and reduces heat buildup
• 11/64 inch diameter for pilot holes and fastener clearance in metal stock
• 5-piece pack provides job-site working stock
• Sold as individual unit of measure (EA) containing 5 bits per package

Compatibility

Designed as a standard 11/64 inch cobalt drill bit compatible with any drill chuck accepting that shank diameter, including standard 3/8 inch and 1/2 inch keyed or keyless drill chucks used in corded and cordless drills.

Installation Notes

Cobalt drill bits should be installed by confirming the chuck is fully tightened before operation and that the workpiece is securely clamped. Use appropriate cutting fluid or lubricant when drilling stainless steel or hardened alloys to extend bit life. Operate at lower RPM settings for harder materials to prevent premature tip degradation. Wear appropriate PPE including eye protection when drilling metal.

Technical Specifications

• Drill Bit Diameter: 11/64 inches
• Bit Material: Cobalt
• Package Quantity: 5 pieces
• Unit of Measure: EA
• Weight: 0.15 pounds

Standard Information

• Brand: Milwaukee Electric Tool Corp
• Manufacturer Part Number: 48-89-2308