Guhring 9039230021840 Spiral Flute Tap 2-64 Unf Cobalt Tin

Product Description

The GUHRING 9039230021840 is a spiral flute tap designed for blind hole threading in metalworking applications. Manufactured from cobalt high-speed steel with a TiN (titanium nitride) coating, this tap handles alloyed and unalloyed steel with consistent thread quality. It cuts a 2-64 UNF right-hand thread to a 2B class of fit, with a modified bottoming chamfer that allows threading close to the bottom of a blind hole. The 40-degree helix angle drives chips up and out of the hole, reducing clogging and improving thread finish in interrupted or deep cuts. Overall length is 1.751 inches with a thread length of 0.236 inches.

This tap is suited for precision machining and maintenance work where fine-thread fastener holes are required in steel workpieces. The modified bottoming chamfer makes it the correct choice when thread engagement near the base of a blind hole is required and full bottoming clearance is limited. It is used by machinists, tool-and-die technicians, and maintenance professionals working with small-diameter, high-thread-count fastener applications in production and repair environments.

Key Features

• Cobalt HSS construction for improved wear resistance and heat tolerance in steel threading
• TiN coating reduces friction and extends tool life in repeated use
• 40-degree right-hand spiral flute ejects chips upward out of blind holes during cutting
• Modified bottoming chamfer allows threading close to the base of a blind hole
• 2B class of fit meets standard UNF tolerance requirements for general fastener applications
• H2/H3 thread limit provides controlled oversize tolerance for plated or coated fastener scenarios

Compatibility

Rated for use in alloyed steel and unalloyed steel. Designed for blind hole threading applications requiring a 2-64 UNF right-hand thread to a 2B class of fit.

Installation Notes

This tap should be installed in a tapping chuck or CNC toolholder appropriate for the shank diameter of 0.141 inches. Power down or disengage the spindle before loading or changing tooling. Use a cutting fluid or tapping compound suitable for steel to extend tool life and maintain thread quality. Follow applicable shop safety procedures and machine manufacturer guidelines when setting depth stops for blind hole operations.