Osg 1663000117 Thread Mill 1/8-27 Npt 4 Flute Solid Carbide

Product Description

The OSG 1663000117 is a solid carbide helical flute thread mill designed for cutting 1/8-27 NPT threads in both internal and external applications. With a 0.302-inch cutting diameter, a 0.407-inch length of cut, and a 0.313-inch shank diameter, this tool handles tapered pipe thread profiles with consistent accuracy. The 4-flute, right-hand configuration combined with an EgiAs coating improves tool life and chip evacuation in demanding machining environments. It is intended for use by machinists and tool-and-die professionals working in CNC milling operations where NPT thread forms are required.

This thread mill is suited for shops producing or servicing components that require NPT pipe thread connections, including fittings, manifolds, valve bodies, and hydraulic or pneumatic housings. The helical flute geometry allows the tool to interpolate threads in a single pass using standard CNC circular interpolation cycles, making it practical for both production runs and low-volume precision work. The compact cutting diameter and short length of cut make it appropriate for tight-clearance bores common in fluid-system components.

Key Features

• 1/8-27 NPT thread form for tapered pipe thread applications
• Solid carbide construction for rigidity and wear resistance
• EgiAs coating extends tool life in abrasive and hard materials
• 4-flute right-hand helical design for efficient chip removal
• Handles both internal and external thread milling in a single tool
• No coolant-through requirement simplifies setup on standard machining centers

Compatibility

Designed for CNC machining centers capable of helical interpolation. Suited for cutting 1/8-27 NPT threads per the NPT thread standard. Compatible with standard 0.313-inch shank tool holders including ER collet chucks and end mill holders.

Installation Notes

Thread mills of this type are installed by qualified machinists or CNC programmers. Ensure the tool holder is properly torqued and the shank is fully seated before running the spindle. Program the tool path using circular interpolation (G02 or G03) per the machine control requirements for the NPT thread helix angle. Verify workpiece fixturing is secure and spindle runout is within tolerance before cutting, as carbide tooling is sensitive to lateral deflection.