Norseman Drill & Tool Letter Sizes HSS Heavy-Duty NAS 907B Type 190-AN Jobber Length Twist Bit
TiN-Coated Precision and Power for Professional Drilling
The Norseman Drill & Tool Letter Sizes HSS Heavy-Duty NAS 907B Type 190-AN Jobber Length Twist Bit is engineered for professionals who require exceptional durability, accuracy, and efficiency in demanding drilling environments. Proudly made in the USA and manufactured to rigorous NAS 907B aerospace specifications, this drill bit delivers superior consistency and performance in machining, fabrication, and industrial maintenance applications.
Built for Strength and High-Performance Drilling
Constructed from premium high-speed steel (HSS), the Type 190-AN is designed to cut through stainless steel, alloy steels, cast iron, and other tough materials with ease. The 135° self-centering split point ensures fast, accurate starts and reduces the need for a center punch. This geometry minimizes walking and lowers thrust pressure, resulting in smoother, more controlled drilling—especially on curved, hardened, or uneven surfaces.
TiN Coating for Extended Tool Life and Efficiency
The advanced Titanium Nitride (TiN) coating significantly enhances:
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Surface hardness
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Heat resistance
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Lubricity
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Chip evacuation
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Overall durability
This coating reduces friction, keeps cutting edges sharper for longer, and supports cooler operation—ideal for high-speed or continuous-use industrial applications. The TiN finish also improves hole quality by producing cleaner, smoother finishes with reduced wear.
Aerospace-Grade Accuracy
Each Type 190-AN drill bit is precision-ground to tight aerospace tolerances, ensuring balanced rotation, accurate hole sizing, and reliable repeatability. The availability of letter-size increments provides fine measurement control for precision-critical drilling tasks.
Key Features
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Heavy-duty HSS construction for drilling hard metals
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Titanium Nitride (TiN) coating for superior hardness and lubricity
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135° split point for walk-free starts and reduced thrust
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Precision-ground for accuracy and smooth performance
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Manufactured to NAS 907B aerospace standards
For professionals who demand power, precision, and long-lasting reliability, the Norseman Letter Size Type 190-AN Jobber Length Twist Bit delivers industry-leading performance in every drilling application.
