Milwaukee 48-89-2524 Cobalt Jobber Drill Bit 5.2 in

Product Description

The MILWAUKEE 48-89-2524 is a cobalt jobber-length twist drill bit engineered for hard metal drilling applications. It features a variable helix geometry with an aggressive 35-degree helix angle that transitions to 15 degrees at the shank end, promoting rapid chip evacuation and reducing heat buildup during extended use. The 135-degree split point tip allows the bit to start precisely without walking, eliminating the need for a center punch in most applications. Licensed tradespeople and metalworking professionals use this bit for drilling stainless steel, high-strength alloys, cast iron, and other demanding ferrous materials.

This bit is suited for industrial maintenance, fabrication shops, and on-site metalwork where bit longevity under continuous drilling loads is critical. The cobalt steel construction provides heat resistance that outperforms standard black oxide bits. A secure-grip shank is machined to prevent slippage inside the chuck, maintaining concentricity during operation. The metric sizing of 5.2 inches in cutting length makes it a direct fit for metric drilling specs common in mechanical and structural applications. Electricians, pipefitters, ironworkers, and general maintenance technicians regularly reach for cobalt bits when standard high-speed steel bits fail prematurely.

Key Features

• Variable helix geometry: 35-degree angle transitions to 15 degrees for rapid chip removal and reduced heat
• 135-degree split point tip for precise starts and no walking
• Cobalt steel construction delivers up to 10 times longer life compared to black oxide drill bits
• Chip breaker design limits heat accumulation during hard metal drilling
• Secure-grip shank prevents bit slippage in the chuck
• Metric sizing for applications requiring precise metric drill diameters

Compatibility

Designed as an OEM-style jobber-length drill bit compatible with standard 3-jaw keyed and keyless drill chucks used in corded and cordless drill drivers, drill presses, and magnetic base drills that accept round-shank bits.

Installation Notes

Installation is performed by tradespeople and machinists using standard drill equipment. Secure the bit fully into the chuck before applying power, and confirm chuck key is removed prior to operation. Use appropriate cutting fluid or lubricant when drilling stainless steel or hardened alloys to extend bit life and prevent work hardening. Wear eye protection and secure the workpiece before drilling.

Technical Specifications

• Cutting Length: 5.2 inches
• Overall Length (Packaged): 7.7 inches
• Helix Angle: 35 degrees (transitioning to 15 degrees)
• Split Point Angle: 135 degrees
• Weight: 0.16 pounds
• Package Width: 1.9 inches
• Package Height: 0.4 inches
• Unit of Measure: Each
• UPC: 045242519545

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2524