Norseman Drill & Tool Fractional Sizes Type 340-A Twist Drill Bit

Norseman Drill & Tool Fractional Sizes Type 340-A Twist Drill Bit

Aerospace-Grade Precision with Superior Wear Resistance

The Norseman Drill & Tool Fractional Sizes Type 340-A Twist Drill Bit is engineered to meet the rigorous demands of aerospace, industrial, and high-precision machining environments. Proudly made in the USA, this premium drill bit is manufactured to NAS 907A aerospace specifications, ensuring exceptional accuracy, consistency, and performance in critical drilling applications.

Built for Strength, Accuracy & Professional Demands

Crafted from premium high-speed steel (HSS), the Type 340-A offers outstanding cutting efficiency and toughness when drilling materials such as steel, aluminum, brass, copper, and other non-ferrous metals. Its 118° standard point geometry delivers smooth, controlled starts with reduced walking, ensuring clean and precise holes—even in demanding production or maintenance settings.

Enhanced Wear Resistance with Black Oxide Finish

The Type 340-A features a high-performance black oxide surface finish, which significantly improves lubricity, reduces friction, and enhances chip evacuation. This protective coating increases wear resistance and heat dissipation, preserving cutting-edge sharpness during high-speed or extended drilling operations.

Precision-Ground for Aerospace-Level Performance

Each bit is precision-ground to tight aerospace tolerances, guaranteeing balance, accuracy, and consistent performance across all fractional sizes. The result is a reliable, professional-grade tool capable of delivering repeatable, high-quality results in machine shops, fabrication facilities, and maintenance departments.

Key Features

• Manufactured to NAS 907A aerospace-grade specifications

• Premium HSS construction for strength, durability, and cutting efficiency

• 118° standard point ensures smooth starts and precise drilling

• Black oxide finish enhances lubricity, chip flow, and wear resistance

• Precision-ground for accuracy, balance, and consistent performance

For machining professionals who demand precision, durability, and aerospace-certified reliability, the Norseman Type 340-A Twist Drill Bit delivers exceptional performance across a wide range of industrial applications.