CHICAGO-LATROBE Aircraft Extension Drill: #4, 12" Overall Lg, 135° Split Point
The CHICAGO-LATROBE Aircraft Extension Drill: #4 is an NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit (SKU 406X97, MPN 11128). It features a 0.2090-inch diameter, 12-inch overall length, 135° split point, and…
SKU 3G-OTH-208060
Need installation or engineering help?
Ask a question
Product Description
The CHICAGO-LATROBE Aircraft Extension Drill: #4 is an NAS-Spec High-Speed Steel Aircraft-Extension Drill Bit (SKU 406X97, MPN 11128). It features a 0.2090-inch diameter, 12-inch overall length, 135° split point, and black oxide finish, conforming to NAS 907 Type B standards.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is the CHICAGO-LATROBE Aircraft Extension Drill #4 used for?
This drill is designed for aerospace and industrial applications requiring deep-hole drilling in hard materials. Its 12-inch overall length and 135° split point reduce walking and improve chip evacuation, making it ideal for aircraft maintenance and fabrication.
What are the specifications of the CHICAGO-LATROBE Aircraft Extension Drill #4?
The CHICAGO-LATROBE Aircraft Extension Drill #4 (MPN 11128) has a 0.2090-inch diameter, 12-inch overall length, 135° split point, and black oxide HSS finish. It conforms to NAS 907 Type B standards for aerospace drilling.
Where to buy the CHICAGO-LATROBE Aircraft Extension Drill #4 worldwide?
3G Electric supplies the CHICAGO-LATROBE Aircraft Extension Drill #4 to customers worldwide. We handle full logistics and customs clearance, ensuring reliable delivery for your aerospace or industrial drilling needs.
How to select the right aircraft extension drill for deep-hole drilling?
Select based on hole diameter, material hardness, and required reach. For aerospace work, choose a drill with a 135° split point to reduce thrust and walking. The CHICAGO-LATROBE #4 offers a 12-inch length and black oxide finish for extended tool life.
Used in
Common applications for CHICAGO-LATROBECHICAGO-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.















