Norseman Drill & Tool Fractional Sizes HSS Heavy-Duty NAS 907B Type 190-AN Jobber Length Twist Bit
Titanium Nitride-Coated Power for Demanding Drilling Applications
The Norseman Drill & Tool Fractional Sizes HSS Heavy-Duty NAS 907B Type 190-AN Jobber Length Twist Bit is engineered for professionals who demand precision, durability, and high-performance drilling in challenging materials. Proudly made in the USA, this heavy-duty bit is manufactured to strict NAS 907B aerospace-grade specifications, delivering consistent accuracy and long tool life across industrial, fabrication, and maintenance environments.
Built for Tough Metals and High-Load Conditions
Constructed from premium high-speed steel (HSS), the Type 190-AN offers exceptional cutting strength and wear resistance. It excels when drilling:
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Stainless steel
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Hardened alloys
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Cast iron
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High-tensile metals
The 135° self-centering split point ensures rapid penetration, reduces thrust pressure, and prevents walking—making it ideal for handheld drills and precision machining where control and accuracy are essential.
TiN Coating for Extended Tool Life
The standout feature of the 190-AN is its Titanium Nitride (TiN) coating, which provides:
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Increased surface hardness
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Enhanced lubricity for smoother cutting
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Superior heat resistance
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Improved chip evacuation
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Longer edge retention
This ultra-hard coating dramatically improves wear resistance, reduces friction, and enables faster, cooler drilling—especially valuable in high-speed or continuous production environments.
Aerospace-Grade Precision
Each bit is precision-ground to NAS 907B tolerances, ensuring balanced operation, consistent hole sizing, and superior stability. Available in fractional sizes, the Type 190-AN is ideally suited for metalworking, manufacturing, and heavy-duty maintenance tasks.
Key Features
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Heavy-duty HSS construction for strength and durability
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135° self-centering split point for accurate starts and reduced thrust
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Titanium Nitride (TiN) coating for increased hardness and heat resistance
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Improved chip flow and smoother hole finishes
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Manufactured to NAS 907B aerospace specifications
For professionals who demand exceptional performance, longevity, and precision, the Norseman Type 190-AN Jobber Length Twist Bit delivers reliable American-made drilling power for every demanding application.
