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CHICAGO-LATROBE Aircraft Extension Drill: 5/16", 12" 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: 5/16", 12" Overall Lg, 135° Split Point

The CHICAGO-LATROBE Aircraft Extension Drill is a NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit with a 5/16" diameter. It features a 12" overall length, 135° split point, and black oxide finish, meeting NAS…

SKU 3G-OTH-207858

Brand
CHICAGO-LATROBE
Item
Aircraft Extension Drill: 5/16", 12" Overall Lg, 135° Split Point
Part Number
11112
Category
NAS-Spec High-Speed Steel Aircraft-Extension Drill Bits
Available to Order
Also known as:11112CHICAGO-LATROBE
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
11112
Type
Black Oxide HSS
Overall Lg
12"
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 with a 5/16" diameter. It features a 12" overall length, 135° split point, and black oxide finish, meeting NAS 907 Type B specifications. The drill bit has a diameter of 0.3125 inches and is identified by manufacturer part number 11112.

Frequently Asked Questions

What is the CHICAGO-LATROBE Aircraft Extension Drill used for?

This drill is designed for aerospace and industrial applications requiring deep-hole drilling in tight spaces. Its 12" overall length and 135° split point allow precise entry into aircraft structures, while the black oxide HSS construction resists wear and reduces friction during extended use.

What are the specifications of the CHICAGO-LATROBE 11112 drill?

The CHICAGO-LATROBE 11112 is a 5/16" diameter, 12" overall length aircraft extension drill with a 135° split point and black oxide HSS finish. It meets NAS 907 Type B specifications and has a 0.3125-inch diameter. The manufacturer part number is 11112.

Where to buy CHICAGO-LATROBE aircraft extension drills worldwide?

3G Electric supplies CHICAGO-LATROBE aircraft extension drills worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us to order the 11112 or other NAS-spec drill bits for your aerospace or manufacturing needs.

How to select the right aircraft extension drill for deep-hole drilling?

Choose a drill with sufficient overall length to reach the hole depth, like the 12" CHICAGO-LATROBE 11112. Ensure the point angle (135° split point) matches the material hardness. Confirm NAS specification compliance (e.g., NAS 907 Type B) for aerospace applications. Always verify diameter and shank compatibility with your tool holder.

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
CHICAGO-LATROBE
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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