CHICAGO-LATROBE Aircraft Extension Drill: 27/64", 6" Overall Lg, 135° Split Point
The CHICAGO-LATROBE Aircraft Extension Drill is a NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit, model 11025, with a 27/64" diameter (0.4219"). It meets NAS 907 Type B specifications and features a 6"…
SKU 3G-OTH-207880
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Product Description
The CHICAGO-LATROBE Aircraft Extension Drill is a NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit, model 11025, with a 27/64" diameter (0.4219"). It meets NAS 907 Type B specifications and features a 6" overall length, 135° split point, and black oxide HSS finish.
Frequently Asked Questions
What is the CHICAGO-LATROBE Aircraft Extension Drill used for?
The CHICAGO-LATROBE Aircraft Extension Drill is designed for drilling in tight, hard-to-reach spaces on aircraft assemblies and other aerospace structures. Its 6" overall length and 135° split point allow precise entry into metal without walking, meeting NAS 907 Type B requirements for critical airframe applications.
What are the specifications of the CHICAGO-LATROBE 11025 drill bit?
The CHICAGO-LATROBE 11025 is a 27/64" (0.4219") diameter aircraft-extension drill bit with a 6" overall length, 135° split point, and black oxide HSS finish. It conforms to NAS 907 Type B specifications, making it suitable for high-strength alloy drilling in aerospace maintenance and manufacturing.
Where to buy CHICAGO-LATROBE aircraft extension drills worldwide?
3G Electric supplies CHICAGO-LATROBE aircraft extension drills worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the 11025 model or other NAS-spec tooling.
How to select the right CHICAGO-LATROBE aircraft extension drill?
Select based on hole diameter, material thickness, and access constraints. The CHICAGO-LATROBE 11025 with 27/64" diameter and 6" length suits standard aerospace fasteners. Ensure the drill meets NAS 907 Type B for structural work. For deeper holes, choose longer extension lengths; for harder alloys, consider cobalt or carbide grades.
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3G Electric supplies CHICAGO-LATROBE nas-spec high-speed steel aircraft-extension drill bits. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















