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Metal Drilling
Twist Drill Bits
  • 48-89-2305 Primary Image
  • The Red Helix Cobalt drill bit offers increased durability and faster drilling. It provides up to 15 times longer life compared to black oxide drill bits. The image displays the drill bit actively cutting through metal, highlighting its robust and efficient performance qualities.
  • Cobalt Drill Bits are ideal for drilling various materials including wood, PVC, copper, aluminum, duct/sheet metal, angle iron, metal, cast iron, and stainless steel. They are compatible with all drill/drivers.
  • The 1/8 in. Cobalt Red Helix Twist Drill Bit is shown with features highlighted: split point tip for accurate starts, variable helix fluting for faster material removal, and a thicker tapered web for increased strength. Dimensions are 1.61 inches and 2.76 inches.
  • Comparison chart showing Cobalt Drill Bit as suitable for hard metal applications, lasting up to 15 times longer than black oxide bits. It has a 3-flat secure grip shank and is used with drills/drivers. Other options include Black Oxide and Shockwave, which are suitable for general purposes and metal respectively.
  • The RED HELIX™ Cobalt 1/2" Drill Bit is shown being used with a power drill to cut through a piece of metal, creating metal shavings. The background displays an industrial work environment.
  • The RED HELIX™ Cobalt 3/8" Drill Bit is attached to a drill and is actively drilling into a metal surface, creating fine metal shavings. The drill is held by a hand and positioned above a square metal object, with industrial pipes in the background.
48-89-2305

1/8" COBALT RED HELIX™ Drill Bit

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Bit Diameter: 1/8"

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1/8" COBALT RED HELIX™ Drill Bit
48-89-2305

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Product Overview

Milwaukee® Thunderbolt® Cobalt drill bits are designed for extreme durability and long life in specialty applications. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate strength and protect against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. The 135° split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee Thunderbolt Cobalt bits require less effort to drill through stainless steel, high alloy steel and cast iron, and are highly recommended for use with portable drills.

  • Up to 10X Life vs. Black Oxide

  • RED HELIX™ Design for Rapid Chip Removal™

  • 135° split point for precision start no walking

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