Accupro 930-56218 Thread Mill 9/16-18 Unf 4 Flute Solid Carbide

Product Description

The ACCUPRO 930-56218 is a solid carbide helical flute thread mill designed for cutting internal UNF threads at 9/16-18. Built from micrograin solid carbide and coated with TiAlN, this tool delivers consistent thread geometry and extended tool life in ferrous and non-ferrous materials. It runs 4 flutes with a 0.37-inch cutting diameter and a 1.25-inch length of cut, making it well suited for threading operations where rigid setup and precise thread form are required. Machinists and CNC operators use this tool in place of traditional taps where thread milling is preferred for tool life or tolerance control.

This thread mill is used in CNC machining centers for producing 9/16-18 UNF internal threads. It is appropriate for production and job-shop environments working in steel, stainless steel, aluminum, and similar machinable alloys. The helical flute geometry supports efficient chip evacuation during the threading pass. The 3/8-inch shank diameter is compatible with standard ER or milling collet systems commonly found on vertical and horizontal machining centers.

Key Features

• 9/16-18 UNF internal thread form with 18 teeth per inch
• 4-flute helical design for improved chip flow and surface finish
• Micrograin solid carbide substrate for hardness and wear resistance
• TiAlN coating extends tool life in high-temperature cutting conditions
• 0.37-inch cutting diameter with 1.25-inch length of cut
• No coolant-through requirement — compatible with flood or mist coolant externally

Compatibility

Designed as an OEM-style thread milling solution for CNC machining centers equipped with a 3/8-inch collet or milling chuck, producing 9/16-18 UNF internal threads in a range of machinable materials.

Installation Notes

Thread mills are installed and run by qualified CNC machinists or tool-and-die professionals. Ensure the spindle and tool holder are clean and properly torqued before use. Program helical interpolation toolpaths to the correct thread pitch and diameter before running. Always verify workpiece clamping and machine rigidity prior to the threading pass to avoid tool deflection or breakage.