Milwaukee 5/8″ Thunderbolt Silver & Deming Drill Bit 48-89-2740

MAXIMUM MATERIAL REMOVAL IN HIGH-TENSILE ALLOYS

When boring through high-tensile materials, stainless steel, or cast iron, the mechanical integrity of the bit determines the efficiency of the entire workflow. The Thunderbolt Silver & Deming series is engineered with a thicker web than standard twist bits, providing the necessary torsional strength to handle the increased feed pressures required for large-diameter drilling. This design minimizes the risk of bit breakage while the specialized parabolic flute geometry ensures rapid chip evacuation, which is critical for managing heat buildup during deep-hole applications. By utilizing a 1/2-inch reduced shank with three milled flats, this bit ensures that the power of the drill is fully transferred to the cutting surface without the risk of chuck slippage under high-torque loads.

• / 135 Split Point: Delivers precision starts on contact to prevent bit walking and ensure accurate hole placement in hard metals.
• / Parabolic Flute Geometry: Optimized for superior chip ejection, keeping the cutting edge cool and extending the service life of the bit.
• / 3-Flat Secure-Grip Shank: Features three milled flats to lock the bit into the chuck, preventing rotation during high-resistance drilling.
• / Black Oxide Coating: Provides essential lubricity to reduce friction and offers high-level corrosion resistance for long-term durability.

TECHNICAL SPECIFICATIONS

WHAT’S IN THE BOX

(1) 5/8″ Thunderbolt Silver & Deming Drill Bit (48-89-2740)