Walter-prototyp 8120182 Internal Thread Mill 4 Flute Carbide

Product Description

The WALTER-PROTOTYP 8120182 is a solid carbide internal helical flute thread mill designed for cutting internal UNC threads in a single helical pass. Built on the TC630 series platform, it features four right-hand flutes and an AlTiN coating that extends tool life in abrasive and high-heat cutting conditions. The overall length is 2.244 inches, and the shank is straight-cylindrical for compatibility with standard collet and end mill holders. This tool is suited for CNC machining centers where rigid setup and precise helical interpolation are required. Machinists and tooling professionals in job shops, aerospace, and general manufacturing use this style of thread mill as an alternative to taps in difficult-to-thread materials.

The 8120182 is applied in internal thread milling operations on CNC machining centers capable of helical interpolation. It is appropriate for threading blind holes and through-holes in steel, cast iron, and similar materials where tap breakage is a concern or where a single tool must cover a range of thread depths. Right-hand flute direction suits standard CNC climb-milling routines. The TC630 series is positioned for general-purpose internal thread milling at production volumes where carbide tool life and coating performance are priorities.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials
• AlTiN coating improves heat resistance and extends tool life in dry or minimal-lubrication cutting
• Four helical flutes provide chip clearance and smooth thread form on internal profiles
• Right-hand flute direction compatible with standard CNC helical interpolation cycles
• Straight-cylindrical shank fits standard collet chucks and end mill holders without special tooling
• UNC thread standard suits common fastener thread applications in North American manufacturing

Compatibility

Designed for use on CNC machining centers capable of helical interpolation; compatible with standard straight-bore collet chucks and end mill holders accepting the straight-cylindrical shank diameter of this tool.

Installation Notes

Installation and setup should be performed by a qualified CNC machinist or tooling specialist. Ensure the spindle and feed drive are fully stopped and the machine is in a safe state before changing or measuring tooling. Confirm runout within acceptable limits at the collet before cutting, as excessive runout accelerates tool wear and degrades thread quality. Program helical interpolation parameters according to the thread pitch and hole diameter; do not substitute plunge-milling cycles for helical thread milling routines.