Milwaukee 48-89-2518 Cobalt Jobber Drill Bit 4.3 in

Product Description

The MILWAUKEE 48-89-2518 is a cobalt jobber-length twist drill bit engineered for hard metal drilling applications. Built with a variable helix geometry that transitions from a 35-degree angle down to 15 degrees, the Red Helix design accelerates chip evacuation and limits heat buildup during cutting. The 135-degree split point tip provides a precise, self-starting entry and prevents the bit from walking across the workpiece surface. Licensed HVAC technicians, pipefitters, electricians, and fabricators working in hard steel, stainless, cast iron, and similar materials will find this bit suited to demanding production and field use.

This bit is designed for tough metal applications where standard high-speed steel or black oxide bits fail prematurely. The jobber-length format fits standard 3-jaw keyed and keyless drill chucks. A Chip Breaker geometry reduces heat accumulation during extended drilling runs, and the Secure Grip shank feature helps prevent slippage in the chuck under high torque. Metric sizing is noted on the bit for quick identification on the job. This is a single-piece (each) unit sold individually.

Key Features

• Variable helix transitions from 35 degrees to 15 degrees for rapid chip removal and reduced heat
• 135-degree split point tip for self-starting precision entry without walking
• Chip Breaker geometry decreases heat buildup during sustained drilling
• Secure Grip shank minimizes chuck slippage under load
• Cobalt construction rated for hard metal applications including steel and stainless
• Metric sizing marked on the bit for fast field identification

Compatibility

Designed as a jobber-length twist drill bit compatible with standard 3-jaw drill chucks for use in all twist drilling applications, with primary suitability for hard metal materials.

Installation Notes

Installation is performed by electricians, pipefitters, HVAC technicians, and metalworkers using a corded or cordless drill or drill press. Secure the shank fully in the chuck before operation and verify chuck key or collar is tightened. Use appropriate cutting fluid when drilling stainless steel or hardened alloys to extend bit life. Inspect the cutting edges for wear before each use and replace if chipping or dullness is observed.

Technical Specifications

• Length: 4.3 inches
• Package Height: 6.75 inches
• Package Width: 1.87 inches
• Package Depth: 0.31 inches
• Weight: 0.07 pounds
• Split Point Angle: 135 degrees
• Helix Angle Range: 15 to 35 degrees
• Unit of Measure: Each
• UPC: 0045242519484

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2518