Milwaukee 48-89-2501 Cobalt Jobber Drill Bit 1.3 in

Product Description

The MILWAUKEE 48-89-2501 is a cobalt jobber-length drill bit engineered for hard metal drilling applications. Built with a variable helix geometry that transitions from a 35-degree cutting angle to a 15-degree relief angle, the bit promotes rapid chip evacuation and limits heat buildup during extended use, helping the cutting edge stay sharp longer. A 135-degree split point tip provides a precise, self-centering start that eliminates walking on contact. This bit is sold individually and is sized in metric. It is intended for use by machinists, pipefitters, ironworkers, and other trade professionals who regularly drill through hard or abrasive metals.

The 48-89-2501 is suited for demanding drilling tasks in hard metals including stainless steel, high-strength alloys, and other materials that rapidly wear standard high-speed steel bits. The cobalt construction and chip-breaker geometry make it appropriate for production drilling environments where bit longevity and hole accuracy are critical. It can also be used in general-purpose twist drilling applications where a premium bit is preferred.

Key Features

• Variable helix geometry transitions from 35 degrees to 15 degrees for rapid chip removal and reduced heat buildup
• 135-degree split point tip provides self-centering start and prevents walking
• Cobalt construction rated for up to 10 times the service life of black oxide bits in hard metal applications
• Chip-breaker design reduces friction and heat at the cutting edge
• Secure-grip shank geometry helps prevent slipping in the chuck
• Metric sizing for precision fit in metric-specified applications

Compatibility

Designed as a jobber-length twist drill bit compatible with standard three-jaw keyed and keyless drill chucks that accept the shank diameter of this bit.

Installation Notes

This bit should be installed by a qualified tradesperson familiar with metal drilling operations. Ensure the drill is powered off and the chuck is fully secured before beginning work. Use cutting fluid or appropriate coolant when drilling hard metals to further reduce heat buildup and extend bit life. Always wear appropriate eye protection and secure the workpiece before drilling.

Technical Specifications

• Point Angle: 135 degrees split point
• Helix Angle: 35 degrees (transitioning to 15 degrees)
• Length: 5.75 inches
• Width: 1.85 inches
• Height: 0.1 inches
• Weight: 0.01 pounds
• Unit of Measure: Each
• UPC: 045242519316

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2501