Chicago-latrobe 44129 Jobber Drill Bit Wire 59 Hss

Product Description

The CHICAGO-LATROBE 44129 is a jobber-length drill bit sized to wire gauge 59, with a decimal diameter of 0.0410 inches. It is manufactured from high speed steel with an oxide coating to reduce friction and extend service life in production drilling environments. The 118-degree standard point angle suits general-purpose entry into ferrous and non-ferrous workpieces. With an overall length of 1.625 inches and a flute length of 0.6875 inches, this bit is designed for precision small-diameter drilling in cast iron and steel. It is a standard tool for machinists, tool-and-die technicians, and maintenance technicians working with small-clearance holes.

This drill bit is suited for use in machine shops, maintenance facilities, and manufacturing environments where small wire-gauge holes are required in steel or cast iron workpieces. The straight-cylindrical shank accepts standard drill chucks without special tooling. Its general-purpose grade makes it appropriate for moderate-speed drilling in both manual and CNC drill press applications where tight diameter tolerances are needed.

Key Features

• Wire gauge 59 sizing at 0.0410 inches decimal diameter for precision small-bore applications
• High speed steel construction with oxide finish for reduced friction and heat buildup
• 118-degree standard point angle with web-thinned, tapered web for improved chip flow
• Regular spiral flute geometry with right-hand cut for conventional drilling machines
• Straight-cylindrical shank compatible with standard drill chucks
• Diameter tolerance of -0.0005 to 0.0000 inches for consistent hole sizing

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks accepting 0.0410-inch straight-cylindrical shanks, conforming to DIN 338 dimensions.

Installation Notes

Installation of this drill bit is performed by machinists and maintenance technicians using standard keyed or keyless drill chucks on drill presses, lathes, or CNC machines. Secure the shank fully in the chuck before beginning any drilling operation. Always power down and de-energize the machine before changing tooling. Use appropriate cutting fluid or lubricant when drilling steel to maintain bit life and hole quality.