Chicago-latrobe 44738 Wire Size 68 Hss Jobber Drill Bit

Product Description

The CHICAGO-LATROBE 44738 is a jobber length drill bit sized to wire gauge 68, with a decimal diameter of 0.0310 inches. Built from high speed steel with an oxide coating, it is designed for high-performance drilling in tight-tolerance applications. The 135-degree split point reduces walking on entry and works well on harder materials. A web-thinned, tapered web construction lowers thrust requirements during drilling. Overall length is 1-3/8 inches with a 1/2-inch flute length. This bit meets NAS 907 Type B standards and is classified as a heavy-duty grade tool, suited for machinists, maintenance technicians, and metalworking professionals.

This drill bit is intended for use in metal fabrication, maintenance, and precision drilling operations. Primary workpiece materials include cast iron, stainless steel, and steel. The small wire gauge diameter makes it a practical choice for pilot holes, instrument panel work, circuit board work, and other applications requiring fine, accurate drilling. The straight-cylindrical shank fits standard chucks, making it compatible with drill presses, CNC machines, and handheld drills used in shop and field settings.

Key Features

• Wire size 68 (0.0310 inches decimal) for fine, tight-tolerance drilling
• 135-degree standard split point reduces bit walking on hard surfaces
• High speed steel construction with oxide finish for wear resistance
• Web-thinned tapered web reduces required thrust force
• Right-hand, regular spiral flute with 2-flute configuration
• Meets NAS 907 Type B specification for heavy-duty grade performance

Compatibility

Designed as a replacement or working-stock jobber length drill bit for use on cast iron, stainless steel, and steel workpieces in applications covered by NAS 907 Type B standards. Straight-cylindrical shank fits standard keyless and keyed drill chucks.

Installation Notes

Installation is performed by machinists or maintenance technicians using a drill press, CNC spindle, or handheld drill with a compatible chuck. Ensure the bit is fully seated and secured in the chuck before operation. At small diameters such as this, reduced feed rates and adequate cutting fluid or coolant help prevent bit breakage. Always wear appropriate eye protection when drilling metal.