Milwaukee 1-1/4″ S&D Black Oxide Drill Bit

HEAVY-DUTY LARGE DIAMETER METAL BORING WITH MAXIMUM CHUCK SECURITY

Engineered for high-torque applications in stainless steel, cast iron, and high-tensile alloys, the Milwaukee Thunderbolt Silver & Deming bit is a masterclass in mechanical durability. The core of this bit features a thicker Thunderbolt web, providing significantly higher torsional strength to resist snapping under heavy loads. By utilizing a 1/2″ reduced shank with three milled flats, this bit allows for 1-1/4″ hole production using standard 1/2″ drill chucks without the risk of the bit spinning or slipping during high-resistance cuts. The black oxide coating is not just for aesthetics; it provides essential lubricity to reduce heat buildup, extending the life of the cutting edges during repetitive drilling cycles in hard metals.

• / 135 Split Point Tip starts on contact to eliminate walking and ensures immediate penetration in hard materials.
• / 3-Flat Secure-Grip Shank provides a mechanical lock in the chuck to prevent bit slippage under high torque.
• / Parabolic Flute Geometry clears chips and debris rapidly to prevent clogging and heat-related edge dulling.
• / Black Oxide Coating offers superior corrosion resistance and reduces friction for faster drilling speeds.

TECHNICAL SPECIFICATIONS

WHAT’S IN THE BOX

(1) 1-1/4″ Thunderbolt Silver & Deming Drill Bit (48-89-2758)