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CHICAGO-LATROBE Aircraft Extension Drill: 27/64", 6" Overall Lg, 135° Split Point - NAS-Spec High-Speed Steel Aircraft-Extension Drill Bits
CHICAGO-LATROBENAS-Spec High-Speed Steel Aircraft-Extension Drill Bits

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

Brand
CHICAGO-LATROBE
Item
Aircraft Extension Drill: 27/64", 6" Overall Lg, 135° Split Point
Part Number
11025
Category
NAS-Spec High-Speed Steel Aircraft-Extension Drill Bits
Available to Order
Also known as:11025CHICAGO-LATROBE
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
11025
Type
Black Oxide HSS
Overall Lg
6"
Split Point
135°

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CHICAGO-LATROBE Products
3G Electric (S) Pte. Ltd. — Singapore

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.

Used in

Common applications for CHICAGO-LATROBE
Aerospace manufacturing — Chicago-Latrobe NAS-spec jobber-length drill bits (e.g., MPN 42631) for drilling holes in airframe components.
Metal fabrication — Chicago-Latrobe single-flute countersinks (e.g., MPN 56774) for deburring and chamfering holes in steel plates.
Machine shop — Chicago-Latrobe 82° countersinks (e.g., MPN 56738) for creating flush-mount recesses for flat-head screws in assemblies.
Maintenance and repair — Chicago-Latrobe 90° countersinks (e.g., MPN 56760) for chamfering holes and removing burrs on industrial equipment.
Automotive production — Chicago-Latrobe HSS drill bits for holemaking in engine blocks and chassis components.
General machining — Chicago-Latrobe countersinks in various body diameters for chamfering and deburring in job shops.
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CHICAGO-LATROBE Products

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.

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Black oxide high-speed steel aircraft-extension drill bit with 135° split point and 12" overall length. Conforms to NAS 907 Type B. Used for drilling deep holes in aircraft structures and other tight-access industrial applications
This NAS 907 Type B aircraft-extension drill bit is made from high-speed steel with a black oxide finish. It features a 135° split point for reduced walking on curved surfaces and an extended 6-inch overall length for reaching confined areas. Suitable for drilling in tough alloys in aerospace and precision metalworking applications
CHICAGO-LATROBE
This NAS 907 Type B aircraft-extension drill bit is made from high-speed steel with a black oxide finish. It features a 135° split point for reduced walking on curved surfaces and an extended 6-inch overall length for reaching confined areas. Suitable for drilling in tough alloys in aerospace and precision metalworking applications

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