Milwaukee 48-89-2522 Cobalt Jobber Drill Bit 4.9 in

Product Description

The MILWAUKEE 48-89-2522 is a cobalt jobber-length twist drill bit built for hard metal applications where standard high-speed steel bits fail prematurely. The variable helix geometry transitions from a 35-degree cutting angle down to 15 degrees, accelerating chip evacuation and reducing heat buildup at the cutting edge. A 135-degree split-point tip starts on contact without a center punch and eliminates walking on curved or flat surfaces. This bit is sold as a single unit and is sized to metric specifications, making it a practical choice for HVAC techs, pipefitters, electricians, and maintenance professionals drilling into stainless, alloy steel, cast iron, and other hard metals.

The 48-89-2522 is suited for jobsite and shop use in residential and light commercial settings. Its jobber-length body fits standard three-jaw chucks on corded and cordless drill drivers and drill presses. The shank incorporates a secure-grip geometry that reduces slippage under torque. Professionals working with hard metals who need consistent, repeatable hole quality will find this bit appropriate for structural steel, sheet metal, angle iron, and similar materials.

Key Features

• Variable helix design transitions from 35 degrees to 15 degrees for rapid chip removal and reduced heat
• 135-degree split-point tip starts on contact and prevents walking without a center punch
• Cobalt construction extends service life in hard metal applications compared to black oxide bits
• Chip breaker geometry limits heat buildup at the cutting edge to maintain edge sharpness longer
• Secure-grip shank reduces bit slippage inside the chuck under load
• Metric sizing for applications requiring metric hole specifications

Compatibility

Designed as a jobber-length twist drill bit compatible with standard three-jaw chucks on corded drill drivers, cordless drill drivers, and bench drill presses used in hard metal drilling applications.

Installation Notes

Installation of this bit should be performed by a qualified tradesperson familiar with rotary drilling equipment. Secure the bit fully in the chuck and verify it runs true before applying feed pressure. Wear appropriate eye protection and secure the workpiece before drilling. Apply cutting fluid when drilling hard alloys to extend bit life and reduce heat at the tip.

Technical Specifications

• Overall Length: 4.9 inches
• Package Length: 6.7 inches
• Package Width: 1.9 inchesPackage Height: 0.4 inches
• Weight: 0.12 pounds
• Point Angle: 135 degrees split point
• Helix Angle: 35 degrees to 15 degrees variable
• Sizing Standard: Metric
• Sold As: Each
• UPC: 045242519521

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2522