Cle-line C21072 Reduced Shank Drill Bit 0.5512 in Hss

Product Description

The CLE-LINE C21072 is a reduced shank twist drill bit machined from high-speed steel (HSS) for general-purpose drilling in ferrous and cast iron workpieces. The bit measures 0.5512 inches (14.00 mm) in diameter with a 1/2 inch straight-cylindrical shank, allowing it to seat in standard 1/2 inch drill chucks despite the larger cutting diameter. Overall length is 6 inches with a flute length of 3.1102 inches, providing adequate chip clearance on through-hole and deep-entry cuts. The 118-degree standard point angle suits a broad range of steel and cast iron applications without requiring special grinding. Spiral flutes run in a right-hand cutting direction. This bit is part of CLE-LINE Series 1813.

This drill bit is suited for metalworking applications in maintenance, fabrication, and repair environments where drilling into steel or cast iron is routine. The reduced shank design allows a larger-diameter bit to run in a standard 1/2 inch chuck, eliminating the need for a larger capacity machine. Typical users include machinists, millwrights, pipefitters, and industrial maintenance technicians working on structural steel, plate steel, pipe flanges, and cast iron components. The coated finish extends tool life under moderate cutting speeds.

Key Features

• Reduced shank design: 0.5512 inch cutting diameter runs in a standard 1/2 inch chuck
• High-speed steel construction for durability in steel and cast iron drilling
• 118-degree standard point angle for general-purpose metal drilling
• 3.1102 inch flute length supports maximum drilling depth of 3.1102 inches
• Right-hand spiral flutes with 2-flute geometry for efficient chip evacuation
• Coated finish for improved wear resistance and reduced friction

Compatibility

Designed for use with standard 1/2 inch capacity drill chucks on drill presses, magnetic drills, and hand-held power drills. Rated for drilling into steel (material code P) and cast iron (material code K) workpieces.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with metal drilling practices. Secure the shank fully in the chuck and verify runout before drilling. Always wear appropriate eye protection and secure the workpiece to prevent rotation. This bit does not support coolant-through operation; use an external cutting fluid when drilling deeper holes or harder steels to manage heat and extend tool life.