Norseman Drill & Tool Fractional Sizes HSS Heavy-Duty NAS 907B Type 190-ACN Jobber Length Twist Bit
TiAlN-Coated Power for Extreme Performance and Durability
The Norseman Drill & Tool Fractional Sizes HSS Heavy-Duty NAS 907B Type 190-ACN Jobber Length Twist Bit is built for professionals who demand exceptional durability, accuracy, and heat resistance during high-performance drilling. Proudly made in the USA and manufactured to NAS 907B aerospace-grade specifications, this drill bit ensures unmatched consistency and reliability in critical applications.
Heavy-Duty Strength for the Toughest Materials
Crafted from premium high-speed steel (HSS), the Type 190-ACN is engineered to perform in the most challenging drilling environments. Its rugged construction makes it ideal for machining:
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Stainless steel
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Titanium
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Inconel
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Hardened and high-tensile alloys
The 135° self-centering split point ensures quick, accurate starts with reduced thrust, preventing walking and providing cleaner, more precise hole finishes—perfect for both hand-held and machine drilling.
TiAlN Coating for Extreme Heat & Wear Resistance
The advanced Titanium Aluminum Nitride (TiAlN) coating is the defining upgrade of the 190-ACN. During operation, this coating forms a hard aluminum oxide layer that delivers:
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Exceptional thermal stability
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Superior wear resistance under extreme loads
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Enhanced lubricity and chip evacuation
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Ability to operate at significantly higher cutting speeds
TiAlN makes this bit ideal for dry machining, high-speed production, and continuous drilling where heat control is critical.
Aerospace-Grade Precision
Every bit is precision-ground to tight NAS 907B tolerances, ensuring consistent hole sizing, balance, and vibration-free performance. Available in fractional sizes, the 190-ACN delivers the accuracy required for industrial, fabrication, and maintenance applications.
Key Features
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TiAlN coating for extreme heat and wear resistance
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Heavy-duty HSS construction for drilling hard metals
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135° split point for walk-free, self-centering starts
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Precision-ground to NAS 907B aerospace standards
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Ideal for stainless steel, titanium, Inconel, and hardened alloys
For superior durability, precision, and high-temperature performance, choose the Norseman Type 190-ACN TiAlN Jobber Length Twist Bit—engineered to outperform in the toughest drilling environments.
