Norseman Drill & Tool Wire Gauge Sizes Premium NAS 907B Type 190-CN Jobber Length Twist Drill
Norseman Drill & Tool Wire Gauge Sizes Premium NAS 907B Type 190-CN Jobber Length Twist Drill: CN-TECH™ Coated Power for Precision Drilling
The Norseman Drill & Tool Wire Gauge Sizes Premium NAS 907B Type 190-CN Jobber Length Twist Drill is engineered to deliver aerospace-grade accuracy, long tool life, and superior strength in the most demanding drilling applications. Proudly made in the USA, this premium drill bit meets NAS 907B performance standards, ensuring consistency, durability, and precision that professionals can depend on.
Crafted from premium high-speed steel (HSS), the 190-CN features Norseman’s proprietary CN-TECH™ nitride case hardening process, which enhances surface hardness, lubricity, and corrosion resistance. This advanced treatment results in exceptional tool life and cooler, more efficient drilling, even in challenging materials such as stainless steel, titanium, and high-tensile alloys.
Each bit is also cryogenically treated at -300°F, a process that transforms the steel’s molecular structure to improve toughness, reduce brittleness, and enhance cutting edge retention. The result is a drill bit that performs consistently in high-speed, high-load conditions where standard tools wear out quickly.
The 135° split-point tip provides quick, accurate starts with minimal walking, while precision-ground spiral flutes ensure smooth chip evacuation and reduced friction during operation. The black and bronze oxide finish further improves lubricity and corrosion protection for dependable, repeatable performance.
Available in wire gauge sizes, these bits offer fine incremental drilling options ideal for aerospace, machining, and precision manufacturing environments.
Key Features:
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CN-TECH™ nitride case hardening for wear and corrosion resistance
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Cryogenic treatment (-300°F) improves toughness and edge retention
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Meets NAS 907B aerospace-grade specifications
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135° split-point design for fast, accurate starts
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Precision-ground flutes for smooth chip removal
For maximum precision, toughness, and tool life, the Norseman Drill & Tool Wire Gauge Sizes Premium NAS 907B Type 190-CN Jobber Length Twist Drill delivers professional-grade performance that outlasts the competition.
