Milwaukee 48-89-2725 Thunderbolt Black Oxide Drill Bit 6 in

Product Description

The MILWAUKEE 48-89-2725 is a Thunderbolt black oxide jobber length drill bit engineered for extreme durability in demanding job-site conditions. Built with a thicker-than-standard web core, this bit resists side-load breakage during heavy-duty drilling applications. A precision-ground 135-degree split point tip starts on contact without walking, and a parabolic flute geometry clears chips and debris rapidly to reduce heat buildup. The black oxide coating adds lubricity and corrosion resistance, extending service life. Licensed tradespeople and skilled contractors working with portable drills will find this bit well-suited for high-repetition drilling tasks on a wide range of materials.

This drill bit is intended for general-purpose jobber-length drilling in metal, wood, and similar materials. The reduced shank diameter allows use in 3/8-inch drill chucks, making it compatible with a broad range of portable drills commonly found on residential and light commercial job sites. Its 135-degree split point geometry makes it particularly effective when drilling on curved or irregular surfaces where bit walking is a common problem. The 3-flat Secure-Grip shank design holds firmly in the chuck and reduces slipping during operation, improving accuracy and safety.

Key Features

• Thicker web core provides greater strength and protection against side-load breakage
• 135-degree split point tip starts on contact to prevent walking for fast, accurate holes
• Parabolic flute form clears chips and debris quickly to keep the bit cool during use
• 3-flat Secure-Grip shank holds firmly in the drill chuck to reduce slipping
• Reduced shank diameter fits 3/8-inch chucks for use with a wide range of portable drills
• Black oxide coating provides lubricity and corrosion resistance for extended bit life

Compatibility

Designed for use with portable drills equipped with 3/8-inch or larger chucks; suitable for general-purpose jobber-length drilling in metal, wood, and similar materials on residential and light commercial job sites.

Installation Notes

Install the bit securely into the drill chuck, ensuring the 3-flat shank is fully seated before tightening. Power down and disconnect the drill from its power source before changing bits. Do not apply excessive lateral force during drilling, as off-axis loading can damage the bit or workpiece. Use appropriate eye protection and follow applicable job-site safety codes when operating rotary drill equipment.

Technical Specifications

• Length: 6 inches
• Shank Type: 3-flat Secure-Grip, reduced diameter for 3/8-inch chucks
• Point Angle: 135 degrees split point
• Flute Type: Parabolic
• Coating: Black oxide
• Weight: 0.08 pounds
• UOM: Each

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2725