48-89-2306 Thunderbolt Cobalt Drill Bit, 9/64 In., 135° Split Point

The Milwaukee 48-89-2306 Thunderbolt Cobalt Drill Bit is engineered for demanding applications in hard metals, including stainless steel and other specialty materials. This precision twist drill bit delivers reliable performance in cordless drills, making it ideal for specialty drilling work where durability and accuracy matter.

Cobalt construction provides exceptional hardness and heat resistance, extending tool life significantly compared to standard black oxide bits. The 135-degree split point tip starts fast and prevents bit walking, ensuring precise hole placement without slipping or binding. Whether you're drilling through tough alloys or hard stainless steel, this jobber-length bit resists breaking and maintains its edge through demanding use.

Features and Benefits

• Cobalt Construction: Engineered for extreme durability and long life in hard metal applications, offering up to 10 times the life of black oxide drill bits.
• 135° Split Point Tip: Delivers precision starts and prevents walking, enabling fast, accurate holes without slipping or binding.
• Variable Helix Design: Includes an aggressive 35-degree helix angle that transitions to 15 degrees, providing rapid chip removal and limiting heat buildup to keep the bit sharper longer.
• Precision Diameter: 9/64-inch diameter for exact hole placement in specialty drilling applications.
• Versatile Use: Suitable for all twist drilling applications while excelling in tough, hard-metal work.

Specifications

• Brand: Milwaukee
• Model: 48-89-2306
• Diameter: 9/64 inch
• Shank Diameter: 9/64 inch
• Overall Length: 2.91 inches
• Material: Cobalt
• Point Angle: 135 degrees
• Bit Type: Jobber, Twist Flute