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CHICAGO-LATROBE Aircraft Extension Drill: #31, 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: #31, 12" Overall Lg, 135° Split Point

The CHICAGO-LATROBE Aircraft Extension Drill: #31 is an NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit (SKU 406Y25, MPN 11155). It features a 0.1200-inch diameter, 12-inch overall length, 135° split point…

SKU 3G-OTH-207977

Brand
CHICAGO-LATROBE
Item
Aircraft Extension Drill: #31, 12" Overall Lg, 135° Split Point
Category
NAS-Spec High-Speed Steel Aircraft-Extension Drill Bits
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
11155
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: #31 is an NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit (SKU 406Y25, MPN 11155). It features a 0.1200-inch diameter, 12-inch overall length, 135° split point, and black oxide HSS finish, conforming to NAS 907 Type B.

Frequently Asked Questions

What is the CHICAGO-LATROBE Aircraft Extension Drill #31 used for?

The CHICAGO-LATROBE Aircraft Extension Drill #31 is designed for drilling in tight, hard-to-reach spaces on aircraft assemblies. Its 12-inch overall length and 135° split point allow precise entry into metal without walking, making it ideal for aerospace maintenance and manufacturing applications.

What are the specifications of the CHICAGO-LATROBE Aircraft Extension Drill #31?

The CHICAGO-LATROBE Aircraft Extension Drill #31 (MPN 11155) has a 0.1200-inch diameter, 12-inch overall length, 135° split point, and black oxide HSS finish. It conforms to NAS 907 Type B, ensuring compliance with aerospace fastener-hole standards.

Where to buy the CHICAGO-LATROBE Aircraft Extension Drill #31 worldwide?

3G Electric supplies the CHICAGO-LATROBE Aircraft Extension Drill #31 worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on this NAS-spec drill bit.

How to select the correct CHICAGO-LATROBE Aircraft Extension Drill for aerospace work?

Select the CHICAGO-LATROBE Aircraft Extension Drill based on hole size and material. The #31 size (0.1200-inch) suits standard aerospace fasteners. Ensure the drill meets NAS 907 Type B for proper fit and finish. The 135° split point reduces thrust, ideal for thin aircraft skins.

Used in

Common applications for CHICAGO-LATROBE
Aerospace assembly — Chicago-Latrobe NAS 907 Type B aircraft-extension drill bits for drilling fastener holes in aluminum and titanium skins.
Metal fabrication — Chicago-Latrobe reduced-shank drill bit sets for enlarging holes in structural steel using magnetic drill presses.
Maintenance repair — Chicago-Latrobe left-hand cobalt jobber-length drill bits for removing broken bolts in machinery.
Tool and die making — Chicago-Latrobe jobber-length drill bit sets with 135° split point for precision hole drilling in hardened steels.
Automotive repair — Chicago-Latrobe spiral-flute screw extractors for removing seized fasteners in engine blocks or exhaust systems.
General manufacturing — Chicago-Latrobe HSS jobber-length drill bits for production drilling in mild steel and cast iron.

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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