Milwaukee 48-89-2514 Cobalt Jobber Drill Bit 3.7 in

Product Description

The MILWAUKEE 48-89-2514 is a cobalt jobber-length 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, promoting rapid chip evacuation and limiting heat buildup to extend cutting edge life. The 135-degree split point tip provides a precise, self-centering start that eliminates bit walking. A built-in chip breaker further reduces heat during prolonged use. This bit is sold individually and is suited for installation professionals, machinists, and trade workers drilling through stainless steel, hardened steel, cast iron, and similar hard metals.

The 48-89-2514 is intended for jobber-length twist drilling in hard metal applications across industrial, commercial, and trade environments. The metric sizing makes it well suited for applications requiring precise metric bore diameters. It can also be used in general-purpose twist drilling where longer bit life and reduced heat buildup are priorities. The variable helix profile helps maintain consistent chip flow in deep-hole drilling scenarios common in HVAC, plumbing, and structural work.

Key Features

• Variable helix design: 35-degree aggressive angle transitioning to 15 degrees for rapid chip removal
• 135-degree split point tip eliminates walking and delivers a precision start
• Chip breaker geometry reduces heat buildup during extended drilling
• Cobalt construction rated for up to 10 times the life versus black oxide drill bits in hard metal
• Secure-grip shank design reduces slippage in drill chuck
• Metric sizing for precise bore diameter control

Compatibility

Designed as a jobber-length twist drill bit compatible with standard keyed and keyless drill chucks accepting the corresponding shank diameter, suitable for use in corded and cordless drills and drill presses.

Installation Notes

Installation and use should be performed by qualified tradespeople familiar with metal drilling procedures. Always secure the workpiece before drilling and use appropriate cutting fluid or lubricant when drilling hard metals to extend bit life. Ensure the drill or drill press is powered off and the chuck is fully tightened before beginning. Wear appropriate eye protection and follow applicable OSHA safety guidelines for metal cutting operations.

Technical Specifications

• Length: 3.7 inches
• Package Length: 5.7 inches
• Package Width: 1.85 inches
• Package Height: 0.3 inches
• Weight: 0.05 pounds
• Point Angle: 135 degrees
• Helix Angle: 35 degrees transitioning to 15 degrees
• Unit of Measure: Each
• UPC: 045242519446

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2514