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CHICAGO-LATROBE 1/4" 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 1/4" TiN-Coated Cobalt Screw-Machine Length Drill Bit

The CHICAGO-LATROBE Screw Machine Drill Bit (MPN 51813) is a 1/4" general purpose cobalt screw-machine length drill bit with a 135° split point and TiN-coated cobalt construction.

SKU 3G-OTH-409475

Brand
CHICAGO-LATROBE
Item
1/4" TiN-Coated Cobalt Screw-Machine Length Drill Bit
Part Number
51813
Category
General Purpose Cobalt Screw-Machine Length Drill Bits
Available to Order
Also known as:51813CHICAGO-LATROBE
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
51813
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 51813) is a 1/4" general purpose cobalt screw-machine length drill bit with a 135° split point and TiN-coated cobalt construction.

Frequently Asked Questions

What is the CHICAGO-LATROBE Screw Machine Drill Bit 51813 used for?

This 1/4" TiN-coated cobalt drill bit is designed for general-purpose screw-machine drilling in metals. Its 135° split point reduces walking and improves penetration, making it suitable for automated or manual drilling operations in manufacturing and maintenance environments.

What are the specifications of the CHICAGO-LATROBE 51813 drill bit?

The CHICAGO-LATROBE 51813 is a 1/4" diameter, general-purpose cobalt screw-machine length drill bit with a 135° split point and TiN coating. The manufacturer part number is 51813, and the bit size is 0.2500 inches.

Where to buy CHICAGO-LATROBE 51813 drill bits worldwide?

3G Electric supplies the CHICAGO-LATROBE 51813 drill bit worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to select the right CHICAGO-LATROBE screw machine drill bit?

Select based on hole diameter, material hardness, and machine type. The 1/4" TiN-coated cobalt bit suits harder metals and automated setups. For softer materials, a standard HSS bit may suffice. Always match the shank to your chuck and use proper coolant for best results.

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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