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CHICAGO-LATROBE 33/64" Black Oxide HSS Extended-Length Drill Bit - High-Speed Steel Extended-Length Drill Bits
CHICAGO-LATROBEHigh-Speed Steel Extended-Length Drill Bits

CHICAGO-LATROBE 33/64" Black Oxide HSS Extended-Length Drill Bit

The CHICAGO-LATROBE Extra Long Drill Bit (33/64", MPN 50581) is a high-speed steel extended-length drill bit with a black oxide finish, 12" overall length, and a 118° notched point. It is designed for deep-hole…

SKU 3G-OTH-207420

Brand
CHICAGO-LATROBE
Item
33/64" Black Oxide HSS Extended-Length Drill Bit
Part Number
50581
Category
High-Speed Steel Extended-Length Drill Bits
Available to Order
Also known as:50581CHICAGO-LATROBE
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
50581
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 (33/64", MPN 50581) is a high-speed steel extended-length drill bit with a black oxide finish, 12" overall length, and a 118° notched point. It is designed for deep-hole drilling applications requiring extended reach.

Frequently Asked Questions

What is the CHICAGO-LATROBE Extra Long Drill Bit 50581 used for?

This 33/64" black oxide HSS drill bit is designed for deep-hole drilling in metal, wood, and plastic. Its 12" overall length and 118° notched point allow precise entry and chip evacuation in hard-to-reach locations, common in maintenance, fabrication, and tool-and-die work.

What are the specifications of the CHICAGO-LATROBE 50581 drill bit?

The CHICAGO-LATROBE 50581 is a 33/64" (0.5156") extra-long drill bit with a 12" overall length. It features a 118° notched point and black oxide finish on high-speed steel (HSS). The notched point reduces walking and improves cutting efficiency in deep-hole applications.

Where to buy CHICAGO-LATROBE 50581 worldwide?

3G Electric supplies the CHICAGO-LATROBE 50581 extra-long drill bit 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 HSS extended-length drill bit.

How to select the right extra-long drill bit for deep-hole drilling?

Choose a bit with overall length exceeding hole depth by at least 2". For metal, use black oxide HSS like the CHICAGO-LATROBE 50581; its 118° notched point aids self-centering. Match diameter (33/64") to your fastener or clearance requirement. Use cutting fluid and peck-feed technique to clear chips.

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 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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This high-speed steel drill bit features a black oxide finish for heat resistance and chip evacuation. The 12" overall length and 118° notched point enable deep-hole drilling in metal, wood, and plastic, with reduced walking on curved surfaces. Suitable for accessing recessed areas in industrial maintenance and fabrication
CHICAGO-LATROBE
This high-speed steel drill bit features a black oxide finish for heat resistance and chip evacuation. The 12" overall length and 118° notched point enable deep-hole drilling in metal, wood, and plastic, with reduced walking on curved surfaces. Suitable for accessing recessed areas in industrial maintenance and fabrication

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