SKU: 43017071573

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

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Description

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

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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43017071573

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Verified Purchase
Suzanne M.
Charlottesville, US
★★★★★ 5
Great support and easy to assemble!
Really can't complain about anything about this chair, it was delivered quickly, packaged very securely and very easy to put together with simple instructions. I work from home and am older with multiple joint problems and this chair has many different ways to be adjusted that really help, especially if I'm extra achy or sore. I really like how the arm rest can be angled so that I can access my keyboard at my desk ergonomically and the arms can be lifted up and out of the way all together so that I can position myself closer to the desk when needed. A really nice chair for a great price.
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Reviewed in the United States on December 6, 2024
J
Verified Purchase
J Rose NYC
Fort Morgan, US
★★★★★ 3
Great Chair, But Armrests Are a Nuisance
This ergonomic office chair has a lot going for it. The mesh back is comfortable and breathable, the adjustable lumbar support is excellent, and the 3D headrest is a welcome addition for long workdays. The rocking function is also a nice feature to have. Overall, the chair is very comfortable and supportive, and seems well-made with the SGS Class 4 gas cylinder. However, there's one glaring flaw that constantly annoys me: the armrests. While they are 3D adjustable, meaning they move up and down, forward and back, and side to side, there's no way to lock them in place. This means that every time I shift in my seat or even just slightly bump the armrest, it moves. It's incredibly frustrating to constantly be readjusting them. It disrupts my focus and makes it hard to find a truly comfortable and consistent position. If the armrests could be locked, this chair would be near perfect. As it stands, this one issue significantly detracts from the overall experience. If you're someone who fidgets or moves around a lot while sitting, I'd seriously consider whether you can live with armrests that constantly need readjustment. For me, it's a daily annoyance that makes me question whether I'd buy this chair again.
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Reviewed in the United States on February 4, 2025
J
Verified Purchase
John Carpenter
Cuba, US
★★★★★ 5
Very comfortable!
Color: Black
Very easy to put together and sturdy!
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Reviewed in the United States on June 10, 2026
M
Verified Purchase
me
Lake Worth, US
★★★★★ 4
Great Chair
I was needing an affordable ergo chair and have tried quite a few. For this price range, you can't beat the quality of this piece. Adjustable lumbar support, arm rest height perfect and cushioned. The head piece is nice, but just not for me. Nicely rocks for those who can't sit still. Easy to assemble by yourself (~20 min) using common sense. The only reason I did not give it 5 stars is the seat is made more for someone wider, as I someone feel like my hips are dipping inwards (I am also very narrow). Got a more solid butt pad, and it's perfect. Also! I didn't even need to put on my lumbar support pillow, as the lumbar support is perfect for me! Definitely recommend!
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Reviewed in the United States on September 28, 2024
A
Verified Purchase
AMT
Battle Creek, US
★★★★★ 5
Stylish, Ergonomic
Stylish, ErgonomicI’ve been looking for a white office chair that doesn't just look good but actually supports my back. This chair exceeds expectations! The split-back design provides amazing lumbar support that moves with you. The mesh is breathable and high-quality, and the cushion is firm yet comfortable for long hours of sitting. Setup was straightforward, and the build feels very sturdy. Highly recommend if you want to upgrade your home office setup!
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Reviewed in the United States on April 14, 2026

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