Osg 1663100217 Thread Mill 1/4-18 Nptf 5 Flute Solid Carbide

Product Description

The OSG 1663100217 is a helical flute thread mill designed for cutting 1/4-18 NPTF tapered pipe threads in solid carbide construction. It features 5 right-hand flutes with an EgiAs coating for improved wear resistance and tool life in demanding materials. The shank diameter is 0.5000 inches with a cutting diameter of 0.3810 inches and a length of cut of 0.6110 inches. This tool is used by machinists and toolroom professionals on CNC machining centers where precise internal pipe thread forms are required in a single helical interpolation pass.

This thread mill is suited for producing NPTF tapered pipe threads in ferrous and non-ferrous materials across precision machining applications. The 5-flute geometry supports efficient chip evacuation while maintaining thread form accuracy at 18 teeth per inch. It is appropriate for use in production environments where thread milling is preferred over tapping due to material hardness, thread tolerance requirements, or the need to produce threads close to a shoulder. The solid carbide substrate provides the rigidity needed for consistent thread geometry.

Key Features

• NPTF tapered pipe thread form at 1/4-18 for pressure-tight connections
• Solid carbide construction for rigidity and dimensional stability
• EgiAs coating for enhanced surface hardness and reduced friction
• 5 right-hand helical flutes for efficient chip removal
• 0.3810 inch cutting diameter with 0.6110 inch length of cut
• 0.5000 inch shank diameter for standard ER or end mill collet compatibility

Compatibility

Designed for use on CNC machining centers capable of helical interpolation for producing NPTF tapered pipe thread forms. Consult OSG Series 16631 documentation for recommended cutting parameters and compatible workpiece materials.

Installation Notes

Thread milling with this tool requires a CNC control capable of helical interpolation; confirm programming method before use. Secure the shank in a precision collet or milling chuck and verify runout before cutting. Follow the tool manufacturer guidelines for feed rate, spindle speed, and depth of cut specific to the workpiece material. Handle solid carbide tooling carefully to avoid chipping the cutting edges during setup and storage.