Osg 4200100211 Thread Mill 1/8-27 Nptf 3 Flute Carbide

Product Description

The OSG 4200100211 is a solid carbide helical flute thread mill designed for cutting 1/8-27 NPTF internal threads in a single helical interpolation pass. With a 0.2860-inch cutting diameter, a 0.409-inch length of cut, and 27 teeth per inch, this tool produces tapered pipe threads to NPTF standards with tight tolerances. The 5/16-inch shank interfaces with standard milling machine toolholders. Three right-hand flutes provide chip clearance and stable cutting action in a range of workpiece materials. The EXO coating improves wear resistance and heat dissipation, extending tool life in production environments. This tool is intended for use by machinists and tool-and-die professionals on CNC machining centers.

This thread mill is suited for machining NPTF pipe thread forms in ferrous and non-ferrous materials where tap breakage is a concern or where a single tool must generate multiple thread sizes by adjusting the CNC interpolation path. At 3.000 inches overall length with a 5/16-inch shank diameter, it fits standard ER and end mill collet toolholding systems commonly found in vertical and horizontal machining centers. Typical applications include fluid system fittings, hydraulic manifolds, and pneumatic port threading in production and job-shop environments.

Key Features

• NPTF thread standard for pressure-tight pipe connections without sealant reliance
• Solid carbide construction for rigidity and dimensional stability in precision threading
• EXO coating for increased surface hardness and reduced tool wear
• Three right-hand helical flutes for efficient chip evacuation
• Helical interpolation method allows a single tool to thread multiple nominal diameters
• No coolant-through requirement — compatible with external flood or mist coolant setups

Compatibility

Designed for use in CNC machining centers with standard 5/16-inch collet or end mill toolholding. Generates 1/8-27 NPTF thread forms via helical interpolation. Part of OSG Series 42001.

Installation Notes

This tool is installed and operated by machinists on CNC machining centers — it is not a hand tool. Confirm spindle speed, feed rate, and helical pitch are programmed per the thread specification before running. Secure the shank fully in the toolholder to the recommended gauge length and verify runout before cutting. Follow machine lockout procedures when changing tools in the spindle.