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CHICAGO-LATROBE Extra Long Drill Bit: 45/64", 12" Overall Lg, 118° Notched Point - High-Speed Steel Extended-Length Drill Bits
CHICAGO-LATROBEHigh-Speed Steel Extended-Length Drill Bits

CHICAGO-LATROBE Extra Long Drill Bit: 45/64", 12" Overall Lg, 118° Notched Point

The CHICAGO-LATROBE Extra Long Drill Bit (SKU 439A08, MPN 50644) is a 45/64" high-speed steel extended-length drill bit with a 12" overall length, 118° notched point, and black oxide finish. It is designed for…

SKU 3G-OTH-207441

Brand
CHICAGO-LATROBE
Item
Extra Long Drill Bit: 45/64", 12" Overall Lg, 118° Notched Point
Category
High-Speed Steel Extended-Length Drill Bits
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
50644
Type
Black Oxide HSS
Overall Lg
12"
Notched Point
118°
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CHICAGO-LATROBE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CHICAGO-LATROBE Extra Long Drill Bit (SKU 439A08, MPN 50644) is a 45/64" high-speed steel extended-length drill bit with a 12" overall length, 118° notched point, and black oxide finish. It is designed for deep-hole drilling applications requiring extended reach.

Frequently Asked Questions

What is the CHICAGO-LATROBE Extra Long Drill Bit used for?

This CHICAGO-LATROBE Extra Long Drill Bit is designed for drilling deep holes in metal, wood, and plastic where standard-length bits cannot reach. Its 12" overall length and 118° notched point reduce walking and improve cutting accuracy in industrial maintenance, fabrication, and tool-and-die applications.

What are the specifications of the CHICAGO-LATROBE Extra Long Drill Bit?

The CHICAGO-LATROBE Extra Long Drill Bit (MPN 50644) has a 45/64" diameter (0.7031"), 12" overall length, and a 118° notched point. It is made from black oxide high-speed steel (HSS) for increased wear resistance and heat dissipation during extended drilling operations.

Where to buy CHICAGO-LATROBE Extra Long Drill Bits worldwide?

3G Electric supplies CHICAGO-LATROBE Extra Long Drill Bits worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on this HSS extended-length drill bit.

How to select the right CHICAGO-LATROBE Extra Long Drill Bit?

Select based on hole depth and material. For holes deeper than 3x the diameter, choose an extended-length bit like this 12" overall length model. The 118° notched point suits general-purpose drilling in steel, while black oxide HSS provides better lubricity and chip evacuation than plain HSS.

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 high-speed steel extended-length 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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