Milwaukee 1-3/16″ S&D Black Oxide Drill Bit

INDUSTRIAL-GRADE PRECISION FOR LARGE-DIAMETER DRILLING

The Milwaukee Thunderbolt Silver & Deming drill bits are engineered for high-torque applications where structural integrity and chip evacuation are paramount. Featuring a reinforced Thunderbolt core, these bits offer a thicker web than standard twist drills, significantly increasing torsional strength and resisting breakage when powering through stainless steel or cast iron. The 135-degree split point eliminates the need for a center punch by biting into the material immediately upon contact, ensuring your layout remains precise even on curved surfaces. Designed for professional-grade performance, the 1/2-inch reduced shank with three milled flats provides a secure interface with your drill chuck, preventing the bit from spinning under heavy feed pressure.

• / THUNDERBOLT WEB STRENGTH: Thicker core design provides increased durability and protects against side-load breakage in high-tensile materials.
• / 135° SPLIT POINT TIP: Starts on contact to prevent bit walking, delivering faster and more accurate holes without the need for pre-drilling.
• / 3-FLAT SECURE-GRIP SHANK: Milled flats prevent the bit from slipping in the chuck, ensuring maximum torque transfer during heavy drilling.
• / PARABOLIC FLUTE GEOMETRY: Clears chips and debris rapidly to reduce heat buildup and extend the cutting life of the bit.
• / BLACK OXIDE COATING: Provides essential lubricity and corrosion resistance, reducing friction for smoother penetration in metal and wood.