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CHICAGO-LATROBE NAS-Spec High-Speed Steel Jobber-Length Drill Bit - NAS-Spec High-Speed Steel Jobber-Length Drill Bits for Aerospace
CHICAGO-LATROBENAS-Spec High-Speed Steel Jobber-Length Drill Bits for Aerospace

CHICAGO-LATROBE NAS-Spec High-Speed Steel Jobber-Length Drill Bit

The CHICAGO-LATROBE Jobber Length Drill Bit (Letter J, MPN 42780) is a NAS-Spec high-speed steel drill bit for aerospace, featuring a TiAlN-coated HSS construction and a 135° split point. With a diameter of 0.2770…

SKU 3G-OTH-190502

Brand
CHICAGO-LATROBE
Item
NAS-Spec High-Speed Steel Jobber-Length Drill Bit
Part Number
42780
Category
NAS-Spec High-Speed Steel Jobber-Length Drill Bits for Aerospace
Available to Order
Also known as:42780CHICAGO-LATROBE
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
42780
Type
TiAlN-Coated HSS
Split Point
135°

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CHICAGO-LATROBE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CHICAGO-LATROBE Jobber Length Drill Bit (Letter J, MPN 42780) is a NAS-Spec high-speed steel drill bit for aerospace, featuring a TiAlN-coated HSS construction and a 135° split point. With a diameter of 0.2770 inches, it is designed for precision drilling in demanding applications. 3G Electric interprets customer demand and delivers this genuine industrial tool across 14 departments, with specialist expertise in combustion, pumps, and controls as a trust anchor.

Frequently Asked Questions

What is the CHICAGO-LATROBE Jobber Length Drill Bit 42780 used for?

This TiAlN-coated HSS drill bit is designed for aerospace and NAS-spec applications. Its 135° split point reduces walking and thrust, making it suitable for drilling hard materials like titanium and stainless steel in precision manufacturing.

What are the specifications of the CHICAGO-LATROBE 42780 drill bit?

The CHICAGO-LATROBE 42780 is a jobber length drill bit with a letter J size (0.2770 inch), 135° split point, and TiAlN-coated high-speed steel. It meets NAS specifications for aerospace drilling, offering heat resistance and extended tool life.

Where to buy CHICAGO-LATROBE 42780 drill bits worldwide?

3G Electric supplies CHICAGO-LATROBE 42780 drill bits worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this NAS-spec TiAlN-coated HSS bit to your facility, regardless of location.

How to select the right CHICAGO-LATROBE drill bit for aerospace work?

For aerospace drilling, choose a bit with a 135° split point and TiAlN coating like the CHICAGO-LATROBE 42780. Match the letter J size (0.2770 inch) to your hole tolerance. Use proper coolant and pecking cycles to manage heat in hard alloys.

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 jobber-length drill bits for aerospace. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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This jobber-length drill bit is made of TiAlN-coated high-speed steel and features a 135° split point per NAS 907 Type B. It is designed for precision drilling in aerospace and other demanding industrial applications where NAS specifications are required. The #11 size has a 0.1910 inch diameter
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