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CHICAGO-LATROBE 5/16" TiN-Coated Cobalt Screw-Machine Length Drill Bit - General Purpose Cobalt Screw-Machine Length Drill Bits
CHICAGO-LATROBEGeneral Purpose Cobalt Screw-Machine Length Drill Bits

CHICAGO-LATROBE 5/16" TiN-Coated Cobalt Screw-Machine Length Drill Bit

The CHICAGO-LATROBE Screw Machine Drill Bit (MPN 51817) is a 5/16" general purpose cobalt screw-machine length drill bit with a 135° split point and TiN-coated cobalt construction.

SKU 3G-OTH-409501

Brand
CHICAGO-LATROBE
Item
5/16" TiN-Coated Cobalt Screw-Machine Length Drill Bit
Part Number
51817
Category
General Purpose Cobalt Screw-Machine Length Drill Bits
Available to Order
Also known as:51817CHICAGO-LATROBE
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
51817
Type
TiN-Coated Cobalt
Split Point
135°

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

Product Description

The CHICAGO-LATROBE Screw Machine Drill Bit (MPN 51817) is a 5/16" general purpose cobalt screw-machine length drill bit with a 135° split point and TiN-coated cobalt construction.

Frequently Asked Questions

What is a Chicago-Latrobe 51817 screw machine drill bit used for?

This TiN-coated cobalt drill bit is designed for high-speed drilling in tough materials like stainless steel and alloy steels. Its 135° split point reduces walking and improves hole accuracy, making it ideal for production machining and automated equipment.

What are the specifications of the Chicago-Latrobe 51817 drill bit?

The Chicago-Latrobe 51817 is a 5/16" (0.3125") general purpose cobalt screw-machine length drill bit with a 135° split point and TiN coating. The TiN coating reduces friction and extends tool life in demanding applications.

Where to buy Chicago-Latrobe 51817 drill bits worldwide?

3G Electric supplies the Chicago-Latrobe 51817 screw machine drill bit to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility, ensuring you receive genuine industrial tooling without supply chain delays.

How to select the right screw machine drill bit for my application?

Choose a screw machine drill bit like the Chicago-Latrobe 51817 when you need short, rigid tooling for high-speed production on CNC or automatic lathes. The 135° split point helps start holes without a center punch, and TiN coating improves lubricity and heat resistance.

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 general purpose cobalt screw-machine 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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General purpose screw-machine length drill bit made of TiN-coated cobalt with a 135° split point. Designed for precision drilling in ferrous metals on automated lathes and CNC machines. The split point reduces walking and the coating extends tool life
CHICAGO-LATROBE
General purpose screw-machine length drill bit made of TiN-coated cobalt with a 135° split point. Designed for precision drilling in ferrous metals on automated lathes and CNC machines. The split point reduces walking and the coating extends tool life

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