Osg 1662500317 Thread Mill 5/16-18 Unc 4 Flute Solid Carbide

Product Description

The OSG 1662500317 is a solid carbide helical flute thread mill designed for cutting 5/16-18 UNC threads in both internal and external applications. With 4 right-hand flutes and an EgiAs coating, this tool delivers consistent thread geometry and extended tool life in demanding machining environments. The 0.224 inch cutting diameter and 0.778 inch length of cut make it well-suited for precise thread milling on CNC machining centers. The 1/4 inch shank diameter fits standard collet and tool holder setups. No coolant-through capability is included, so conventional coolant delivery or dry machining applies.

This thread mill is intended for use in metalworking and precision machining operations where helical interpolation is required to generate 5/16-18 UNC threads. It is suited for shops running production or job shop work on CNC mills with helical interpolation capability. The tool handles both internal bores and external thread profiles in a single setup, reducing tool changes and cycle time. Machinists working with ferrous and non-ferrous metals will find the EgiAs coating beneficial for wear resistance and surface finish quality.

Key Features

• Cuts 5/16-18 UNC threads at 18 teeth per inch in internal and external applications
• Solid carbide construction for rigidity and dimensional accuracy
• EgiAs coating for improved wear resistance and tool longevity
• 4 right-hand helical flutes for efficient chip evacuation
• 1/4 inch shank diameter for compatibility with standard collet tool holders
• Right-hand thread direction with no coolant-through requirement

Compatibility

Designed as an OEM-style thread milling solution for CNC machining centers capable of helical interpolation with 1/4 inch collet or tool holder interfaces, producing 5/16-18 UNC thread profiles.

Installation Notes

Thread mills of this type are installed and operated by machinists on CNC milling equipment using helical interpolation G-code routines. Verify spindle speed, feed rate, and helix pitch settings in the CAM program before running. Secure the shank fully in the collet or tool holder and confirm runout is within acceptable tolerance before cutting. Always power down and lock out the machine before changing or inspecting tooling.