CHICAGO-LATROBENAS-Spec High-Speed Steel Aircraft-Extension Drill Bits

CHICAGO-LATROBE Aircraft Extension Drill: 5/16", 6" 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 (0.3125). It meets NAS 907 Type B specifications and features a 6" overall length, 135°…

SKU 3G-OTH-207856

Brand

CHICAGO-LATROBE

Item

Aircraft Extension Drill: 5/16", 6" Overall Lg, 135° Split Point

Technical Specifications

CHICAGO-LATROBE

Manufacturer Part Number

11018

Type

Black Oxide HSS 

Overall Lg

6"

Split Point

135° 

View Full Spec Sheet

Technical Documents

No technical documents available for this product.

Request documentation →

Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.

Talk to an engineer

Ask a question

CHICAGO-LATROBE Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

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 6" overall length and 135° split point allow precise entry into hard metals without walking, meeting NAS 907 Type B standards for aircraft maintenance and manufacturing.

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

The drill has a 5/16" diameter (0.3125"), 6" overall length, 135° split point, and black oxide HSS finish. It meets NAS 907 Type B specifications and carries manufacturer part number 11018. The black oxide coating reduces friction and improves chip evacuation in high-strength alloys.

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

3G Electric supplies the CHICAGO-LATROBE Aircraft Extension Drill (MPN 11018) 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.

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

Select based on hole diameter (5/16"), required depth (6" overall length), and material hardness. The 135° split point is ideal for drilling into stainless steel and titanium without pre-punching. Ensure the drill meets NAS 907 Type B for aerospace compliance. 3G Electric can help match your application.

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.

Browse all CHICAGO-LATROBE products →Contact our engineers →