Osg 1662501417 Thread Mill 1/2-28 Unef 5 Flute Solid Carbide

Product Description

The OSG 1662501417 is a solid carbide helical flute thread mill designed for cutting 1/2-28 UNEF threads in both internal and external applications. The tool features 5 right-hand flutes, a 0.343-inch cutting diameter, and a 1.107-inch length of cut, making it well-suited for threading operations that require precise thread geometry in a single helical pass. The 3/8-inch shank provides a stable interface with standard toolholders. An EgiAs coating reduces friction and extends tool life in production environments. This mill is intended for use in CNC machining centers operated by skilled machinists or tool-and-die professionals.

This thread mill is used in shop environments where UNEF thread forms are required, including aerospace, automotive, and precision mechanical assembly applications. It handles both internal and external threading in one tool, reducing the need for separate taps or dies in certain setups. Typical applications include threading aluminum, steel, and other machinable materials where 1/2-28 UNEF thread engagement is specified. At 28 teeth per inch, it is optimized for fine-pitch threading work where thread accuracy and surface finish are critical.

Key Features

• Cuts 1/2-28 UNEF threads in both internal and external configurations
• 5 right-hand helical flutes for stable chip evacuation
• Solid carbide construction for rigidity and wear resistance
• EgiAs coating for reduced friction and extended tool life
• 0.343-inch cutting diameter with 1.107-inch length of cut
• 3/8-inch shank diameter for compatibility with standard CNC toolholders

Compatibility

Designed as a replacement or production thread mill for CNC machining centers using standard 3/8-inch toolholders where 1/2-28 UNEF thread milling capability is required.

Installation Notes

Thread mills of this type are installed and operated by trained machinists on CNC milling centers. Ensure the toolholder is properly torqued and the tool is secured before spindle operation. Program helical interpolation paths according to the thread specification before running; incorrect toolpath programming is a leading cause of thread form error and tool breakage. Inspect the cutting edges before each use and replace the tool at first sign of edge wear to maintain thread quality.