Milwaukee 48-89-2313 Cobalt Drill Bit 1/4 Inch

Product Description

The Milwaukee Electric Tool Corp 48-89-2313 is a 1/4-inch cobalt drill bit designed for specialty drilling in hard metals, including stainless steel and other high-alloy materials. It features a 135-degree split point tip that starts cutting on contact, eliminating bit walking on smooth or curved surfaces. The Thunderbolt core construction resists breaking under the torsional stress common in hard-metal applications. This bit ships in skin card packaging with a package quantity of 5 units, making it practical for job site stock or tool crib replenishment. It is suited for use in corded and cordless drill drivers across trade and industrial applications.

This cobalt drill bit is built for professionals who regularly drill into stainless steel, cast iron, high-strength alloys, and other hard ferrous and non-ferrous metals. Its cobalt composition provides heat resistance that standard high-speed steel bits cannot match, which is critical when drilling with cordless tools at variable speeds. Electricians, pipefitters, fabricators, and maintenance mechanics commonly use this bit for conduit work, flange drilling, and equipment mounting in materials that wear conventional bits quickly.

Key Features

• 135-degree split point tip eliminates walking and allows fast starts on hard surfaces without a center punch
• Cobalt construction provides superior heat resistance for sustained drilling in stainless steel and hard alloys
• Thunderbolt core geometry resists breaking under high-torque and cordless-drill applications
• 1/4-inch diameter suits standard drill chucks and quick-change adaptors common in trade use
• Packaged quantity of 5 units per skin card for convenient restocking

Compatibility

Designed for use in standard 3/8-inch and 1/2-inch keyed or keyless drill chucks, as well as quick-change hex-shank adaptors accepting 1/4-inch round shank bits. Suitable for corded and cordless drill drivers commonly used in metalworking and trade applications.

Installation Notes

This bit is installed and operated by electricians, pipefitters, millwrights, and general tradespeople performing metal drilling tasks. Always secure the workpiece before drilling and use cutting fluid or lubricant when drilling stainless steel to extend bit life and reduce heat buildup. Inspect the bit tip before each use and replace if the cutting edges are chipped or dulled. Follow applicable OSHA hand and power tool safety guidelines when operating drill equipment.

Technical Specifications

• Diameter: 1/4 inch
• Tip Angle: 135 degrees split point
• Material: Cobalt
• Package Quantity: 5 units
• Unit of Measure: EA
• Weight: 0.28 pounds

Standard Information

• Brand: Milwaukee Electric Tool Corp
• Manufacturer Part Number: 48-89-2313