Norseman Drill & Tool Fractional Sizes HSS Heavy-Duty NAS 907B Type 190-ACN Jobber Length Twist Bit
TiCN-Coated Strength for Precision and Durability
The Norseman Drill & Tool Fractional Sizes HSS Heavy-Duty NAS 907B Type 190-ACN Jobber Length Twist Bit is engineered for professionals who require uncompromising strength, accuracy, and longevity. Proudly Made in the USA and manufactured to NAS 907B aerospace-grade specifications, this heavy-duty drill bit delivers exceptional performance in industrial, fabrication, and maintenance environments where consistent precision is essential.
Built for Tough Metals and High-Load Conditions
Constructed from premium high-speed steel (HSS), the Type 190-ACN withstands rigorous drilling demands, including stainless steel, titanium, hardened alloys, and other high-tensile materials. Its 135° self-centering split point ensures fast, accurate penetration, reduces thrust pressure, and prevents walking—resulting in cleaner hole finishes and improved operator control.
The heavy-duty design provides maximum rigidity and strength, minimizing deflection and maintaining cutting efficiency even under prolonged or high-torque applications.
TiCN Coating for Superior Wear Resistance
What sets the 190-ACN apart is its advanced Titanium Carbon Nitride (TiCN) coating, engineered to dramatically boost performance by enhancing:
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Surface hardness
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Lubricity and chip evacuation
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Heat and wear resistance
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Cutting speed and tool life
This ultra-hard, low-friction coating keeps the cutting edge cooler, sharper, and more efficient—ideal for continuous or high-speed drilling in demanding production environments.
Each bit is precision-ground to NAS 907B tolerances for balanced, vibration-free operation and consistent hole accuracy.
Key Features
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TiCN coating for extreme hardness, lubricity, and heat resistance
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Heavy-duty HSS construction for drilling stainless steel, titanium & hard alloys
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135° split point for accurate, walk-free starts and reduced thrust
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Precision-ground to NAS 907B aerospace-grade specifications
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Available in fractional sizes for broad industrial versatility
For maximum durability, efficiency, and drilling precision, the Norseman Type 190-ACN TiCN Jobber Length Twist Bit delivers the elite performance trusted by machinists, fabricators, and industrial professionals.
