Milwaukee 3/8" Thunderbolt Black Oxide Drill Bit 48-89-2840

ENGINEERED FOR MAXIMUM CORE STRENGTH AND SIDE-LOAD RESISTANCE

Standard drill bits often fail at the core when subjected to the high-torque demands of modern portable drills, but the Thunderbolt® series is engineered to solve this mechanical bottleneck. By utilizing a thicker web than traditional jobber bits, this bit provides the structural integrity required to resist side-load breakage during deep-hole drilling. The 135-degree split point is a critical feature for professional accuracy, as it prevents the bit from walking on curved or hard surfaces, allowing for immediate penetration. Combined with a parabolic flute that accelerates chip evacuation to manage thermal buildup, this bit maintains its cutting edge longer, providing a significantly higher return on investment for high-volume metal and wood applications.

• / THUNDERBOLT® Web Geometry: Designed with a reinforced thicker core to provide ultimate strength and protect against snapping under heavy side-loads.
• / 135° Split Point Tip: Starts on contact to prevent walking and delivers fast, accurate holes without the need for a center punch.
• / Parabolic Flute Form: Clears chips and debris rapidly to keep the bit cool and maintain cutting efficiency in deep-hole applications.
• / 3-Flat Secure-Grip™ Shank: Engineered with three flat sides to prevent the bit from slipping in the chuck, ensuring maximum torque transfer.
• / Black Oxide Coating: Provides essential lubricity to reduce friction and resists corrosion for extended tool life in harsh environments.

WHAT'S IN THE BOX

(1) 3/8" Thunderbolt Black Oxide Drill Bit