Chicago-latrobe 44128 Jobber Drill Bit Wire 58 Hss

Product Description

The CHICAGO-LATROBE 44128 is a jobber-length drill bit in wire size 58 (0.0420 inches decimal), manufactured from high speed steel with an oxide finish. It is designed for general-purpose drilling in light-gauge metal, cast iron, and steel across fabrication, maintenance, and production applications. The bit features a 118-degree standard point angle, a 2-flute spiral configuration, and a straight-cylindrical shank sized at 0.0420 inches in diameter. Web thinning improves penetration and reduces thrust load at the point. Licensed trades and machine operators working with small-diameter hole requirements in ferrous materials will find this bit fits standard drill chucks and collet setups without modification.

This drill bit is suited for drilling cast iron and steel in both shop and field environments. The Series 150 designation places it within a general-purpose line sized for production and maintenance drilling. Its compact 1.625-inch overall length makes it practical for close-quarters work where a longer bit would interfere with surrounding structure or fixturing. The oxide coating provides a baseline level of lubricity and corrosion resistance for standard dry or lightly lubricated drilling operations.

Key Features

• Wire size 58, 0.0420 inches decimal diameter with a tolerance of -0.0005 to 0.0000 inches
• 118-degree standard split point with web thinning for reduced entry thrust
• High speed steel construction with oxide coating for general ferrous drilling
• 2-flute regular spiral flute for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks and collets
• Conforms to DIN 338 standards for jobber-length drill geometry

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks and collets accepting a 0.0420-inch straight shank, compatible with hand drills, drill presses, and CNC equipment set up for wire-gauge tooling in cast iron and steel applications.

Installation Notes

Installation and use of this bit is performed by machinists, maintenance technicians, and trade professionals operating hand drills or drill press equipment. Secure the shank fully in the chuck before operation and verify runout on precision setups. Use appropriate cutting fluid or dry drilling conditions as specified for the workpiece material. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed to maintain hole-size tolerance.