Cleveland C73403 7/64 Inch Hss Jobber Drill Bit

Product Description

The CLEVELAND C73403 is a jobber-length twist drill bit designed for general-purpose drilling in metal fabrication, maintenance, and light industrial applications. Ground from high speed steel with a bright uncoated finish, it measures 7/64 inch (0.1094 inch decimal) in diameter with an overall length of 2-5/8 inches and a flute length of 1-1/2 inches. The 118-degree split point promotes accurate starting and reduces the need for a center punch on most surfaces. A tapered web with web thinning reduces thrust and improves chip evacuation. This bit is sold individually and meets NAS 907 Type A standards.

The C73403 is suited for drilling aluminum and similar non-ferrous metals, as well as general shop use in residential and light commercial maintenance work. The right-hand spiral flute geometry pulls chips out of the hole efficiently during through-drilling operations. Its straight-cylindrical shank seats in standard 3-jaw drill chucks on handheld drills, drill presses, and CNC machines. HVAC technicians, plumbers, electricians, and general maintenance mechanics commonly keep jobber-length HSS bits in this size range for sheet metal, bracket, and fixture work.

Key Features

• 118-degree split point for accurate, self-starting entry without center punching
• High speed steel construction rated for heavy-duty drilling classification
• Tapered web with web thinning reduces drilling thrust and improves chip flow
• Regular spiral flute geometry optimized for aluminum and non-ferrous primary workpiece materials
• Bright uncoated finish for easy visual wear inspection
• Meets NAS 907 Type A specification for consistent dimensional accuracy

Compatibility

Designed as an OEM-style jobber-length drill bit fitting standard straight-shank drill chucks; diameter tolerance of -0.0005 to 0.0000 inch ensures consistent fit across NAS 907 Type A compliant toolholding equipment.

Installation Notes

Installation is performed by machinists, maintenance technicians, and trade professionals using any standard keyed or keyless 3-jaw chuck rated for the shank diameter. Secure the shank fully in the chuck before operation and verify chuck tightness. Use appropriate cutting fluid or lubrication when drilling metals to extend bit life and improve hole quality. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is visibly dull or damaged.