Studio view of the Bosch CO14B drill bit set arranged by size, from largest to smallest, showing the gold-tone cobalt finish.
Studio view of the Bosch CO14B drill bit set arranged by size, from largest to smallest, showing the gold-tone cobalt finish.
Infographic diagram of a cobalt drill bit highlighting features: split point on bits 1/8 inch and larger, surface-hardened tip, thick web-helix design, and three-flat shank.
Retail packaging for the 14-piece cobalt drill bit set in a hard plastic case, displaying features like 10x life, M42 alloy with 8% cobalt, and stainless steel application.
Angled view of the retail packaging showing the drill bits organized inside the clear-front plastic case with a secure latch.
Front view of the 14-piece drill bit set inside its storage case, clearly showing the range of bit sizes and the "Cobalt" branding on the yellow label.
The Bosch cobalt drill bit set case lying open on a metal workbench next to metal shavings and a weld seam.
A worker drilling upwards into a steel I-beam using a Bosch cordless drill and a gold-tone cobalt drill bit.
Close-up of a cobalt drill bit drilling through a piece of angle iron clamped to a wooden workbench, producing metal shavings.
High-angle view of a drill with a cobalt bit resting on a metal surface covered in shavings next to a completed hole.
Macro shot of a cobalt drill bit lying on a metal surface surrounded by dark metal drilling chips.
Extreme close-up of a cobalt bit drilling into metal, producing long, spiral metal shavings with heat discoloration visible on the workpiece.
Close-up action shot of a cobalt bit penetrating a thick steel plate, creating bright silver metal shavings.
Studio view of the Bosch CO14B drill bit set arranged by size, from largest to smallest, showing the gold-tone cobalt finish.
Studio view of the Bosch CO14B drill bit set arranged by size, from largest to smallest, showing the gold-tone cobalt finish.
Infographic diagram of a cobalt drill bit highlighting features: split point on bits 1/8 inch and larger, surface-hardened tip, thick web-helix design, and three-flat shank.
Retail packaging for the 14-piece cobalt drill bit set in a hard plastic case, displaying features like 10x life, M42 alloy with 8% cobalt, and stainless steel application.
Angled view of the retail packaging showing the drill bits organized inside the clear-front plastic case with a secure latch.
Front view of the 14-piece drill bit set inside its storage case, clearly showing the range of bit sizes and the "Cobalt" branding on the yellow label.
The Bosch cobalt drill bit set case lying open on a metal workbench next to metal shavings and a weld seam.
A worker drilling upwards into a steel I-beam using a Bosch cordless drill and a gold-tone cobalt drill bit.
Close-up of a cobalt drill bit drilling through a piece of angle iron clamped to a wooden workbench, producing metal shavings.
High-angle view of a drill with a cobalt bit resting on a metal surface covered in shavings next to a completed hole.
Macro shot of a cobalt drill bit lying on a metal surface surrounded by dark metal drilling chips.
Extreme close-up of a cobalt bit drilling into metal, producing long, spiral metal shavings with heat discoloration visible on the workpiece.
Close-up action shot of a cobalt bit penetrating a thick steel plate, creating bright silver metal shavings.
BOSCH

Bosch CO14B 14-Piece Cobalt M42 Drill Bit Set 8 Percent Alloy for Stainless Steel High Heat Metal Drilling Surface Hardened Tips Plastic Storage Case

In stock
SKU: CO14B
$42.50

Description

Bosch Promtional Logo Logout

Ultimate Industrial Drilling Performance: Bosch CO14B 14-Piece M42 8% Cobalt Drill Bit Set

When your project demands precision drilling through stainless steel, cast iron, or other high-tensile abrasive metals, the Bosch CO14B 14-Piece Cobalt M42 Drill Bit Set provides the industrial-grade solution you need. Engineered with an upgraded M42 alloy containing 8% cobalt, these bits are specifically designed to withstand the extreme heat generated by drilling into hardened materials. This advanced metallurgy allows the bits to deliver up to 10X longer life than standard high-speed steel bits, making them the gold standard for fabrication shops, automotive repair, and industrial maintenance. The thick web-helix design provides superior structural stability, significantly reducing bit breakage and "walking" when starting a hole in rounded or uneven surfaces.

Precision is built into every bit in this comprehensive fractional set. The surface-hardened tips are optimized to penetrate tough metals with minimal effort, ensuring clean and accurate holes even during extended drilling sessions in high-heat environments. These bits excel in professional applications where failure is not an option, from drilling through thick-gauge steel plates to managing layered composites. The set is housed in a durable, impact-resistant plastic case that keeps your bits organized and protected from jobsite debris. Whether you are a professional fabricator or a dedicated hobbyist, the Bosch CO14B set provides the thermal resilience and cutting edge retention required to handle the most demanding metalworking tasks with clinical efficiency.

Key Features

  • Upgraded M42 Cobalt Alloy: Formulated with 8% cobalt to provide extreme durability and thermal resistance in abrasive metals.
  • 10X Extended Tool Life: Delivers significantly higher longevity compared to standard HSS bits when drilling through hardened steel.
  • Surface-Hardened Tips: Specifically engineered to penetrate tough materials quickly while maintaining a sharp cutting edge.
  • Thick Web-Helix Design: Increases the structural strength of the bit to reduce breakage and enhance stability under heavy loads.
  • High-Heat Resilience: Rated for high-temperature applications, preventing the bit from softening or dulling during continuous use.
  • Professional Range of Sizes: Includes 14 essential fractional sizes to cover the most common industrial and fabrication drilling needs.

What's Included

  • (14) Bosch M42 8% Cobalt Drill Bits (Various Fractional Sizes)
  • (1) Rugged Plastic Storage Case

Specifications

Brand Bosch
Model Number CO14B
Material M42 Cobalt Alloy (8% Cobalt)
Piece Count 14 Pieces
Application Stainless Steel, Cast Iron, High-Heat Metals
Tip Design Surface-Hardened
Helix Style Thick Web Helix
Heat Resistance High-Temperature Rated
Storage Case Durable Plastic
System Compatibility Standard Three-Jaw Drill Chucks

Pro-Tip: When drilling through stainless steel or other hardened metals, always use a slow RPM setting and apply a high-quality cutting fluid or oil. Cobalt bits are designed to cut through hard materials, but keeping the friction-induced heat to a minimum will ensure the M42 alloy maintains its razor-sharp edge for hundreds of additional holes.