Chicago-latrobe 44127 Wire Size 57 Jobber Drill Bit Hss

Product Description

The CHICAGO-LATROBE 44127 is a jobber length drill bit in wire size 57, manufactured from high speed steel with an oxide coating for surface protection during general-purpose drilling. The bit measures 1.75 inches overall length with a 0.375 inch flute length and a straight cylindrical shank diameter of 0.0430 inches. The 118-degree standard point angle and two-flute spiral configuration allow efficient chip evacuation in a variety of materials. Diameter tolerance is held to -0.0005 to 0.0000 inches, making the bit suitable for applications requiring consistent hole sizing. The web-thinned, tapered web design reduces thrust requirements at the point. This bit is installed by machinists, maintenance technicians, and trade professionals working in metal fabrication or mechanical service environments.

The 44127 is rated for general-purpose drilling in cast iron and steel. Its compact 1.75 inch overall length and wire gauge sizing make it appropriate for precision hole work where standard fractional bits are too large. Typical applications include pilot holes, clearance holes for fasteners, and layout work in sheet metal or structural steel. The Series 150 designation places this bit within a general-purpose line intended for everyday production and maintenance drilling tasks. Each package contains one bit, sold in multiples of 12.

Key Features

• Wire size 57 decimal equivalent of 0.0430 inches for precision small-diameter hole work
• High speed steel construction with oxide coating for basic corrosion and wear resistance
• 118-degree standard point angle for use in cast iron and steel
• Web-thinned tapered web reduces drilling thrust at the point
• Right-hand spiral flute with regular spiral for consistent chip removal
• Conforms to DIN 338 standard for jobber length drill geometry

Compatibility

Designed as a general-purpose jobber length drill bit suitable for use in standard drill presses, hand drills, and CNC drilling equipment accepting straight cylindrical shanks in the 0.0430 inch diameter range. Primary workpiece materials are cast iron and steel.

Installation Notes

This bit is installed by machinists and trade technicians using standard drill chucks or collet systems rated for the 0.0430 inch shank diameter. Secure workpieces firmly before drilling to prevent movement at small bit diameters. Use appropriate cutting fluid or lubricant when drilling steel to extend bit life and maintain hole tolerance. Inspect the bit tip for wear before each use, as small-diameter high speed steel bits are susceptible to breakage under side load or excessive feed pressure.