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CHICAGO-LATROBE Aircraft Extension Drill: #21, 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: #21, 12" Overall Lg, 135° Split Point

The CHICAGO-LATROBE Aircraft Extension Drill: #21 is an NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit (SKU 406Y15, MPN 11145). It features a 0.1590-inch diameter, 12-inch overall length, 135° split point…

SKU 3G-OTH-208005

Brand
CHICAGO-LATROBE
Item
Aircraft Extension Drill: #21, 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
11145
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: #21 is an NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit (SKU 406Y15, MPN 11145). It features a 0.1590-inch diameter, 12-inch overall length, 135° split point, and black oxide HSS construction, conforming to NAS 907 Type B.

Frequently Asked Questions

What is the CHICAGO-LATROBE Aircraft Extension Drill #21 used for?

This NAS 907 Type B drill is designed for aerospace and industrial applications requiring deep-hole drilling in tight spaces. Its 12-inch overall length and 135° split point reduce walking and improve chip evacuation in high-strength materials.

What are the specifications of the CHICAGO-LATROBE 11145 drill?

The CHICAGO-LATROBE 11145 is a #21 aircraft extension drill with a 0.1590-inch diameter, 12-inch overall length, 135° split point, and black oxide HSS construction. It conforms to NAS 907 Type B for aerospace-grade drilling.

Where to buy CHICAGO-LATROBE aircraft extension drills worldwide?

3G Electric supplies and delivers CHICAGO-LATROBE aircraft extension drills worldwide. We handle full logistics and customs clearance, ensuring you receive genuine NAS-spec tooling like the 11145 for your aerospace or industrial operations.

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

Choose a drill with a 135° split point to reduce thrust and walking on curved surfaces. Ensure overall length matches your access depth. The CHICAGO-LATROBE #21 with 12-inch length and NAS 907 Type B compliance is a proven choice for aerospace maintenance.

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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