Cleveland C73449 Jobber Drill Bit No. 21 Hss 118 Deg

Product Description

The CLEVELAND C73449 is a jobber-length, high-speed steel drill bit sized to wire gauge No. 21 (0.1590 inches decimal). It features a 118-degree split point for reduced walking and faster penetration on entry, and a bright uncoated finish suited for general-purpose drilling. The right-hand spiral flute geometry promotes efficient chip evacuation. Overall length is 3.25 inches with a 2.125-inch flute length, and the straight-cylindrical shank measures 0.1590 inches in diameter. This is a heavy-duty grade bit built to NAS 907 Type A specification, making it appropriate for precision and production drilling environments.

The C73449 is designed for use on aluminum as its primary workpiece material, though the HSS construction handles a range of soft-to-medium materials encountered in sheet metal, fabrication, and MRO applications. The regular spiral and tapered web configuration with web thinning help maintain cutting efficiency through the full flute length. This bit ships individually and is well suited for machine shop, HVAC sheet metal, and light-structural drilling tasks where wire-gauge sizing is specified by print or NAS standard.

Key Features

• Wire gauge No. 21 sizing at 0.1590 inches decimal for print-called applications
• 118-degree split point reduces thrust and minimizes walk on entry
• High-speed steel construction with bright uncoated finish
• Web-thinned tapered web for reduced cutting resistance
• Right-hand cut, regular spiral, two-flute design for reliable chip evacuation
• Meets NAS 907 Type A specification for precision fitment and consistency

Compatibility

Designed as an OEM-style jobber-length drill bit for use in standard straight-shank drill chucks on hand drills, drill presses, and CNC machining centers requiring a No. 21 wire-gauge diameter bit.

Installation Notes

Installation and use should be performed by machinists, fabricators, or qualified tradespeople familiar with rotary cutting tools. Secure the straight-cylindrical shank firmly in a properly sized drill chuck before operation. Inspect the cutting edges for damage or wear before each use, and replace the bit if the point is chipped or the diameter is outside tolerance. Follow applicable shop safety practices, including eye protection and proper workpiece clamping.