Milwaukee 48-89-2329 Cobalt Drill Bit 1/2 Inch 135 Degree

Product Description

The MILWAUKEE ELECTRIC TOOL CORP 48-89-2329 is a 1/2 inch cobalt drill bit engineered for specialty drilling in hard metals, including stainless steel and other high-alloy materials. The 135-degree split point tip starts cutting on contact, eliminating the need for a center punch and preventing the bit from walking across the workpiece surface. The Thunderbolt core construction is designed to resist breaking under the torque loads common in hard-metal applications. This bit is well-suited for electricians, plumbers, HVAC technicians, and fabricators who regularly drill through hard ferrous and non-ferrous metals on the job.

This cobalt drill bit is intended for use in stationary drill presses and handheld drills, including cordless platforms. It is a practical choice for trade professionals drilling through stainless steel HVAC components, pipe flanges, equipment enclosures, structural steel, and similar hard-metal substrates. The cobalt alloy construction retains cutting hardness at elevated temperatures, making it suitable for prolonged or repeated drilling cycles without rapid edge degradation. Sold as a single bit per unit of measure.

Key Features

• 135-degree split point tip starts on contact with no walking and no need for a center punch
• Cobalt alloy construction retains hardness at high cutting temperatures for extended bit life in hard metals
• Thunderbolt core geometry resists bit breakage under high-torque conditions
• Compatible with cordless and corded drill drivers
• Designed specifically for hard metals including stainless steel

Compatibility

Designed for use in standard 1/2 inch keyed and keyless drill chucks on corded or cordless drill drivers and drill presses. Suitable for drilling hard metals including stainless steel, tool steel, and similar high-alloy materials.

Installation Notes

This bit is installed by trade professionals and experienced users in a standard drill chuck. Secure the bit fully in the chuck before drilling and verify chuck key is removed before powering the tool. Use appropriate cutting fluid or lubricant when drilling stainless steel or other hard metals to extend bit life and reduce heat buildup. Wear appropriate PPE including eye protection whenever drilling metal.

Technical Specifications

• Bit Diameter: 1/2 inch
• Tip Angle: 135 degrees split point
• Material: Cobalt alloy
• Weight: 0.66 pounds
• Unit of Measure: Each (EA)

Standard Information

• Brand: MILWAUKEE ELECTRIC TOOL CORP
• Manufacturer Part Number: 48-89-2329