Iscar 5604984 Thread Mill 1/4-28 Internal 3 Flute Solid Carbide

Product Description

The ISCAR 5604984 is a solid carbide helical flute thread mill designed for cutting internal 1/4-28 UNF threads. It features three right-hand flutes and a TiAlN coating that improves wear resistance and extends tool life in demanding materials. The cutting diameter is 0.197 inches with a 0.57-inch length of cut, and the 1/4-inch shank fits standard collet and end mill holders. This tool mills threads in a single helical pass, making it suitable for CNC machining centers in production and job shop environments. Machinists and toolroom specialists are the primary installers of this tooling.

This thread mill is used for producing internal 1/4-28 UNF threaded holes in precision machining applications. It is well suited for materials where tool wear is a concern, as the TiAlN coating provides thermal and abrasion resistance. Typical applications include aerospace, automotive, and general metalworking where right-hand internal threads must be produced to UNF standards. The helical flute geometry reduces cutting forces and improves chip evacuation compared to solid tap tooling.

Key Features

• Cuts internal 1/4-28 UNF threads with 28 teeth per inch
• Solid carbide construction for rigidity and tool life
• TiAlN coating for heat and wear resistance
• Three right-hand helical flutes for efficient chip evacuation
• 0.197-inch cutting diameter with 0.57-inch length of cut
• 2.5-inch overall length with 1/4-inch shank for standard toolholding

Compatibility

Designed as an OEM-style thread milling tool for use in CNC machining centers capable of helical interpolation, accepting a 1/4-inch straight shank in collet chucks or end mill holders.

Installation Notes

Thread mills of this type require a CNC machining center with helical interpolation capability. Ensure the tool is seated fully and securely in the holder before operation, and verify runout with a dial indicator before cutting. Cutting parameters including feed rate and spindle speed should be set per the tool manufacturer recommendations for the workpiece material. Coolant-through is not supported on this tool; external coolant or mist lubrication should be used where applicable.