Cleveland C57215 Spiral Point Tap 1/2-13 Unc Plug Hss

Product Description

The CLEVELAND C57215 is a spiral point tap designed for right-hand, through-hole threading in a 1/2-13 UNC thread form. Built from high-speed steel with a bright, uncoated finish, it is suited for production and maintenance threading operations in machine shop and fabrication environments. The plug chamfer geometry drives chips forward ahead of the tap as it advances through the hole, making it well matched to through-hole applications. With an H3 thread limit and a 3B class of fit, the C57215 holds consistent tolerance for general-purpose threaded fastener assemblies. Licensed machinists, tool and die makers, and maintenance mechanics are the primary users of this tap.

The C57215 is appropriate for threading alloy steel, carbon steel, and aluminum workpieces. Its through-hole threading application makes it a standard choice on CNC machining centers, knee mills, and drill press setups where a through-hole is pre-drilled to the correct tap drill diameter before the tapping cycle. The plug chamfer provides a gradual cutting action that distributes load across the leading threads, reducing tool deflection at typical feed rates for this diameter and pitch.

Key Features

• 1/2-13 UNC thread form with H3 thread limit for consistent 3B class of fit tolerances
• Plug chamfer advances chips forward, optimized for through-hole threading operations
• High-speed steel construction provides hardness and toughness across alloy steel, carbon steel, and aluminum
• Bright, uncoated finish allows for easy visual wear inspection during use
• Right-hand thread direction compatible with standard tapping heads and CNC canned tapping cycles
• 3-flute design balances chip clearance and cutting-edge support at this thread size

Compatibility

Designed for through-hole threading applications in alloy steel, carbon steel, and aluminum workpieces requiring a 1/2-13 UNC thread form and a 3B class of fit. Part of the Cleveland Series 1011 tap line.

Installation Notes

This tap should be installed in a tap holder or collet sized to the shank diameter of 0.367 inches and used with a correctly sized 1/2-13 tap drill. Power down all machine spindles and lock out energy sources before changing tooling. Apply an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and maintain thread quality. Do not reverse the tap under power without a reversing-capable tapping attachment or a synchronized CNC tapping cycle.