Milwaukee 3/4″ S&D Black Oxide Drill Bit

INDUSTRIAL-GRADE PRECISION FOR LARGE-DIAMETER METAL BORING

When stepping up to large-diameter holes in stainless steel or cast iron, the mechanical integrity of the bit is the difference between a clean bore and a failed tool. This Thunderbolt Silver & Deming bit is engineered with a thicker core than standard twist bits, providing the superior torsional strength required to handle high-torque loads without deflection. The parabolic flute geometry is a critical design feature; it accelerates chip evacuation to prevent heat buildupthe primary cause of edge dulling in high-tensile materials. By integrating a 1/2-inch reduced shank with three milled flats, Milwaukee ensures that the massive torque generated by your drill is transferred directly to the workpiece rather than slipping in the chuck, maximizing your professional ROI through speed and tool longevity.

• / 135 Split Point Tip starts on contact to prevent walking, allowing for immediate penetration in hard metals without the need for a center punch.
• / Thunderbolt Web Design features a thicker core to increase durability and protect against side-load breakage in deep-hole applications.
• / 3-Flat Secure-Grip Shank provides three milled surfaces to lock the bit into the chuck, preventing slippage under heavy resistance.
• / Black Oxide Coating provides essential lubricity and resists corrosion, maintaining the bit’s cutting efficiency through repetitive use in cast iron and stainless.

TECHNICAL SPECIFICATIONS

WHAT’S IN THE BOX

(1) 47/64″ Thunderbolt Silver & Deming Drill Bit (48-89-2746)