Milwaukee 1/4″ THUNDERBOLT Black Oxide Drill Bit (12 PK)

REINFORCED CORE TECHNOLOGY FOR HIGH-STRESS DRILLING APPLICATIONS

The Milwaukee Thunderbolt Black Oxide series is engineered to solve the primary failure point of standard jobber bits: torsional snapping under side-load. By utilizing the proprietary Thunderbolt web, which features a significantly thicker core, these bits provide the structural integrity required for heavy-duty drilling in metal, wood, and plastic. The parabolic flute geometry is specifically designed to eject chips rapidly, preventing heat buildup that typically dulls cutting edges prematurely. For professionals using portable drills, the 135-degree split point is a critical mechanical advantage, ensuring the bit engages the material immediately without walking, even on curved or irregular surfaces.

• / Thunderbolt Web Design: Thicker core provides ultimate strength and protects against breakage during deep-hole or side-load applications.
• / 135 Split Point: Precision-ground tip starts on contact to eliminate bit walking and ensure accurate hole placement.
• / Parabolic Flute Geometry: Clears debris and chips quickly to maintain lower operating temperatures and extend bit life.
• / 3-Flat Secure-Grip Shank: Prevents the bit from spinning in the chuck under high-torque loads, maximizing power transfer.
• / 3/8″ Reduced Shank: Allows for the use of a 1/2″ diameter bit in standard 3/8″ drill chucks.

TECHNICAL SPECIFICATIONS

WHAT’S IN THE BOX

(1) 1/2″ Thunderbolt Black Oxide Drill Bit (48-89-2832)