Cleveland C73459 Jobber Drill Bit Wire 31 Hss 118 Deg

Product Description

The CLEVELAND C73459 is a jobber-length drill bit designed for precision hole-making in metal fabrication and general machining applications. Built from high-speed steel (HSS) with a bright, uncoated finish, this bit runs at wire gauge size 31, corresponding to a decimal diameter of 0.1200 inches. The 118-degree split point reduces walking on entry and lowers thrust requirements at the start of the cut. A tapered web with web-thinning further improves chip evacuation and cutting efficiency. At 2.75 inches overall length with a 1.625-inch spiral flute, the C73459 delivers the reach and chip clearance expected in jobber-length tooling.

This drill bit is rated for primary use in aluminum and is well-suited for light-duty to heavy-duty production drilling in sheet metal, structural components, and fabricated assemblies. The right-hand, regular-spiral flute geometry handles standard drill press, hand drill, and CNC drilling operations. It conforms to NAS 907 Type A standards, making it appropriate for aerospace and precision industrial environments where dimensional tolerances are tightly controlled. The straight-cylindrical shank seats securely in standard drill chucks without modification.

Key Features

• Wire size 31, decimal diameter 0.1200 inches, tolerance -0.0005 to 0.0000 inches for controlled fit
• 118-degree split point reduces entry walking and lowers required feed force
• Web-thinned, tapered web configuration improves chip flow and reduces heat buildup
• High-speed steel construction handles intermittent cutting in aluminum and similar materials
• Bright uncoated finish — no coating to chip or delaminate during regrinding
• Meets NAS 907 Type A specification for aerospace and precision industrial use

Compatibility

Designed as an OEM-style jobber-length drill bit replacement for wire gauge 31 applications conforming to NAS 907 Type A standards. Fits standard straight-shank drill chucks used in drill presses, hand drills, and CNC machining centers.

Installation Notes

Installation and use should be performed by machinists or qualified trade professionals familiar with rotating cutting tools. Secure the straight-cylindrical shank firmly in a properly sized drill chuck before operation, and verify chuck runout is within acceptable limits to avoid oversizing the hole. Always wear appropriate eye protection and secure the workpiece before drilling. Inspect the cutting edges and web condition before each use and regrind or replace the bit when cutting performance degrades.