Chicago-latrobe 69028 Jobber Drill Bit Wire 28 Hss

Product Description

The CHICAGO-LATROBE 69028 is a jobber-length twist drill bit designed for precision drilling in steel alloy and similar ferrous materials. Built from high-speed steel with a bright uncoated finish, this bit is part of the heavy-duty Series 150DH lineup. It features a 135-degree split point for self-centering starts and reduced walk on hard surfaces, along with a parabolic flute geometry that promotes fast chip evacuation and cooler cutting. The wire gauge size is No. 28, with a decimal diameter of 0.1405 inches and a diameter tolerance of -0.0007 to 0.0000 inches. Professional machinists, maintenance technicians, and trade contractors working with steel alloy stock will find this bit suited to production and maintenance drilling applications.

This bit is intended for right-hand cutting operations in steel alloy workpieces, including structural steel, fabricated components, and general metalworking applications. The parabolic flute design reduces cutting resistance and improves chip clearance in deeper holes compared to standard jobber flute geometry. The straight cylindrical shank measures 0.1405 inches in diameter and seats directly in standard drill chucks without adapters. Series 150DH bits are positioned as heavy-duty jobber-length tools for both bench drill press use and hand-held drill motor applications in shop and field environments.

Key Features

• 135-degree split point for self-centering starts and reduced thrust in steel alloy
• Parabolic flute geometry for faster chip evacuation and reduced heat buildup
• Web-thinned, tapered web construction for lighter cutting action
• High-speed steel construction rated for heavy-duty drilling service
• Bright uncoated finish for general-purpose ferrous metal applications
• Straight cylindrical shank fits standard drill chucks without a bushing or adapter

Compatibility

Designed as a direct-fit jobber-length drill bit for use in standard 3-jaw drill chucks on bench drill presses, drill motors, and CNC drilling equipment accepting straight cylindrical shanks. Primary workpiece material is steel alloy as specified by the manufacturer.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with metal drilling operations. Secure the shank fully in the chuck and verify concentricity before drilling. Always power down and lock out the drill press or drill motor before changing bits. Use appropriate cutting fluid or coolant for extended production runs in steel alloy, even though this bit does not support coolant-through delivery.