Chicago-latrobe 44136 Jobber Drill Bit Wire 66 Hss

Product Description

The CHICAGO-LATROBE 44136 is a jobber-length drill bit in wire gauge size 66, designed for general-purpose drilling in ferrous materials. Manufactured from high speed steel with an oxide coating, the bit measures 0.0330 inches in diameter and carries a 118-degree standard point angle. The spiral flute geometry and web-thinned construction promote clean chip evacuation and reduce thrust during entry. A straight-cylindrical shank ensures compatibility with standard drill chucks. At 1-3/8 inches overall length with a 1/2-inch flute, this is a compact bit suited for precision work in tight applications where control matters.

This bit is well suited for drilling cast iron and steel in light manufacturing, maintenance, and fabrication environments. The regular spiral and tapered web configuration make it appropriate for production drilling where consistent hole geometry is required at small diameters. It is commonly used by machinists, pipefitters, electricians, and general maintenance technicians who require reliable small-diameter drilling without frequent bit changes. The Series 150 designation indicates conformance to DIN 338 standards, a common benchmark for jobber-length geometry and tolerance.

Key Features

• Wire gauge size 66 with 0.0330-inch decimal diameter and tight tolerance of -0.0005 to 0.0000 inches
• High speed steel construction with oxide coating for basic corrosion and wear resistance
• 118-degree standard point angle suitable for steel and cast iron drilling
• Web-thinned, tapered web design reduces entry thrust on small-diameter cuts
• Right-hand cut with regular spiral flute for efficient chip removal
• Conforms to DIN 338 jobber-length standard, Series 150

Compatibility

Designed as a general-purpose jobber-length drill bit for use in cast iron and steel. The straight-cylindrical shank fits standard keyed and keyless drill chucks accepting shanks of 0.0330 inches.

Installation Notes

Installation and use of small-diameter drill bits should be performed by qualified machinists or tradespeople familiar with proper drill press or hand-drill operation. Secure the workpiece before drilling to prevent bit deflection or breakage at small diameters. Use appropriate cutting fluid or lubrication when drilling steel to extend bit life and maintain hole tolerance. Inspect the bit for tip damage before each use, as small wire-gauge bits are susceptible to breakage if operated off-center or at excessive feed rates.