Milwaukee 1-1/16″ S&D Black Oxide Drill Bit

ENGINEERED FOR EXTREME DURABILITY IN LARGE DIAMETER BORING

The Milwaukee 48-89-2755 Thunderbolt Silver & Deming drill bit is engineered for high-demand applications where structural integrity and chip clearance are paramount. Featuring a thick-core Thunderbolt web, this bit is designed to resist the torsional stresses that often cause standard bits to snap under heavy load. The 135-degree split point eliminates the need for a center punch, providing immediate engagement on hard surfaces like stainless steel and cast iron without walking. By integrating a parabolic flute geometry, this bit maximizes chip ejection, reducing heat buildup and extending the service life of the cutting edges during deep-hole drilling in high-tensile materials.

• / 135° Split Point Tip starts on contact to prevent walking and ensures precision hole placement in metal and hard alloys.
• / 3-Flat Secure-Grip™ Shank prevents the bit from slipping in the chuck, maximizing torque transfer during high-load drilling.
• / Thunderbolt® Web Geometry provides a thicker core than standard bits for increased strength and resistance to side-load breakage.
• / Black Oxide Coating enhances lubricity and provides superior corrosion resistance for long-term jobsite reliability.
• / 1/2″ Reduced Shank allows for large 1-1/4″ diameter holes to be drilled using standard 1/2″ drill chucks.