Milwaukee 48-89-2720 Black Oxide Jobber Drill Bit 6 Inch

Product Description

The MILWAUKEE 48-89-2720 is a black oxide jobber-length drill bit built for heavy use in trade and production drilling applications. The Thunderbolt web design uses a thicker core than a standard drill bit, increasing torsional strength and resistance to side-load breakage. A parabolic flute geometry clears chips and debris quickly, reducing heat buildup at the cutting edge. The 135-degree split point tip engages the workpiece on contact without a center punch, starting accurately and preventing the bit from walking. Black oxide coating reduces friction and provides corrosion resistance. Electricians, plumbers, HVAC techs, and general contractors reach for this bit when they need a reliable, long-lasting drill bit for everyday metal and wood drilling.

The 48-89-2720 is suited for drilling steel, wood, aluminum, and similar materials in residential and light commercial jobsite conditions. The 3-flat shank seats firmly in drill chucks to prevent slipping under load. The reduced shank diameter allows use in 3/8-inch chucks, making it compatible with a wide range of portable drills. The 135-degree split point design is especially practical when drilling on curved or angled surfaces where bit control matters. Sold individually, it fits smoothly into a standard bit roll or case alongside other jobber-length bits.

Key Features

• Thicker Thunderbolt web core increases strength and resists side-load breakage
• 135-degree split point tip starts on contact, eliminating walking on curved or angled surfaces
• Parabolic flute geometry clears chips rapidly to keep the bit running cool
• 3-flat shank locks securely in the chuck to prevent slipping under load
• Reduced shank diameter allows use in 3/8-inch chucks for compatibility with portable drills
• Black oxide coating provides lubricity and resists corrosion

Compatibility

Designed for use with standard 3/8-inch and larger keyed or keyless drill chucks on corded and cordless portable drills. Compatible with typical jobber-length bit holders and drill indexes.

Installation Notes

Insert the 3-flat shank fully into the chuck and tighten securely before drilling to prevent spin-out. Use appropriate RPM for the material being drilled — lower speeds for thicker steel, higher speeds for softer materials. Wear appropriate eye protection when drilling metal or other materials that produce flying chips. Inspect the cutting edges before each use and replace the bit if the tip shows signs of heat damage or wear.

Technical Specifications

• Overall Length: 6 inches
• Point Angle: 135 degrees
• Flute Type: Parabolic
• Shank Type: 3-Flat Secure-Grip
• Coating: Black Oxide
• Weight: 0.04 pounds
• UOM: Each

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2720