Chicago-latrobe 69021 Jobber Drill Bit Wire 21 Hss

Product Description

The CHICAGO-LATROBE 69021 is a jobber length drill bit in wire gauge size 21, measuring 0.1590 inches in diameter. Built from high speed steel with a bright uncoated finish, it features a 135-degree split point and a parabolic flute design that clears chips efficiently during drilling. The web-thinned, tapered web construction reduces thrust and improves hole entry in harder materials. At 3.25 inches overall length with a 2.125-inch flute length, it fits standard drill chucks via its straight-cylindrical shank. This is a heavy duty Series 150DH bit suited for production and maintenance drilling applications.

The 69021 is designed for drilling steel alloy and similar ferrous workpiece materials. Its parabolic flute geometry makes it well suited for applications where chip evacuation and cutting speed matter, such as fabrication shops, mechanical contractors, and industrial maintenance environments. The right-hand cut and split-point tip allow the bit to self-center without a pilot hole on flat or curved steel surfaces, reducing setup time on the job.

Key Features

• Wire gauge size 21 at 0.1590 inches diameter for precise hole sizing
• 135-degree split point self-centers and reduces walking on steel surfaces
• Parabolic flute geometry promotes fast chip evacuation and reduces heat buildup
• Web-thinned tapered web lowers drilling thrust and extends bit life
• High speed steel construction rated for heavy duty use in steel alloy materials
• Bright uncoated finish allows visual wear inspection during service

Compatibility

Designed as an OEM-style replacement or direct-use jobber length drill bit for standard straight-shank drill chucks and compatible with any application requiring a wire size 21 diameter hole in ferrous or similar workpiece materials.

Installation Notes

This bit is installed by trade professionals and machinists using standard keyed or keyless drill chucks rated for the 0.1590-inch shank diameter. Secure the shank fully in the chuck before operation and verify the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or coolant when drilling steel alloy to manage heat and extend bit life. Inspect the cutting edges for wear before each use and replace the bit if chipping or dullness is observed.