Cleveland C73456 Jobber Drill Bit Wire 28 Hss 118 Deg

Product Description

The CLEVELAND C73456 is a jobber-length drill bit designed for precision hole-making in metalworking and general manufacturing applications. Built from high speed steel with a bright uncoated finish, this wire gauge size 28 bit measures 0.1405 inches in diameter and delivers a 118-degree split point for accurate starts and reduced walking on entry. The overall length is 2-7/8 inches with a 1-3/4-inch spiral flute, and the straight-cylindrical shank seats securely in standard drill chucks. The web-thinned, tapered web design reduces thrust and improves chip evacuation. This is a heavy-duty grade bit conforming to NAS 907 Type A standards, suited for machinists, maintenance technicians, and fabricators working to close tolerances.

The C73456 is well suited for drilling aluminum and similar non-ferrous materials in production and maintenance environments. The right-hand, regular spiral flute geometry promotes consistent chip flow and helps prevent material buildup on the cutting edge. With a 0.1405-inch shank diameter matching the drill diameter, this bit fits standard keyless and keyed chucks without adapters. Typical applications include fixture work, prototype fabrication, sheet metal layout, and general-purpose drilling where wire gauge sizing is specified by engineering drawings or NAS standards.

Key Features

• Wire gauge size 28 — 0.1405 inch decimal diameter for precise, specification-driven hole sizing
• 118-degree split point reduces walking and improves entry accuracy on flat and curved surfaces
• High speed steel construction handles a broad range of metalworking and fabrication tasks
• Web-thinned, tapered web reduces drilling thrust and extends cutting life
• Right-hand spiral flute promotes efficient chip evacuation during through-hole drilling
• Conforms to NAS 907 Type A specification for use in aerospace and precision manufacturing contexts

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for applications requiring NAS 907 Type A wire gauge size 28 tooling. Compatible with any standard drill press, hand drill, or CNC machining center equipped with a chuck accepting a 0.1405-inch straight-cylindrical shank.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard drill presses, hand drills, or CNC spindles. Ensure the chuck is fully tightened and the bit is seated concentrically before operation to prevent runout. Always wear appropriate eye protection and secure the workpiece before drilling. For aluminum and soft metals, use appropriate cutting fluid or dry cutting depending on shop practice and material specification.