Accupro 930-00108 Thread Mill 1-8 Unc 4 Flute Solid Carbide

Product Description

The ACCUPRO 930-00108 is a helical flute thread mill designed for cutting internal UNC threads in solid carbide construction. It produces 1-8 UNC internal threads with a cutting diameter of 0.62 inches and a length of cut of 1.375 inches. The tool features 4 flutes ground from micrograin solid carbide and is finished with a TiAlN coating for heat resistance and extended tool life in ferrous and hard materials. A 0.625 inch shank provides rigid setup in standard toolholders. This tool is used by machinists and CNC operators in precision metalworking environments where thread milling is preferred over tapping.

This thread mill is suited for CNC machining centers performing internal thread operations in materials including steel, stainless steel, and cast iron. The helical flute geometry allows the tool to interpolate threads in a single helical pass, reducing cutting forces compared to solid taps. It is appropriate for job shops, production machining facilities, and tool rooms requiring a reliable single-tool solution for 1-8 UNC internal threading with consistent thread form and surface finish.

Key Features

• 1-8 UNC internal thread form with 8 teeth per inch
• 4-flute helical geometry reduces cutting forces and improves chip evacuation
• Micrograin solid carbide construction for rigidity and wear resistance
• TiAlN coating provides thermal protection in dry and semi-dry cutting conditions
• 0.62 inch cutting diameter with 1.375 inch length of cut
• No coolant-through design — compatible with external coolant or near-dry machining

Compatibility

Designed for use in CNC machining centers capable of helical interpolation. Fits standard toolholders accepting a 0.625 inch shank diameter. Suitable for producing 1-8 UNC internal threads in components requiring a minimum nominal bore diameter of 1.0 inch.

Installation Notes

Thread mills require a CNC control capable of helical interpolation — confirm machine compatibility before use. Secure the shank fully in a precision collet or milling chuck to minimize runout, which directly affects thread quality and tool life. Set cutting parameters per the workpiece material and manufacturer recommendations; do not exceed the rated depth of cut for the flute length. Inspect the tool for edge condition before each use and replace at first sign of chipping or coating wear.