Carmex S0250C3732UN Thread Mill 8-32 Unc 3 Flute Carbide

Product Description

The CARMEX S0250C3732UN is a solid carbide helical flute thread mill designed for cutting internal 8-32 UNC threads in a single helical interpolation pass. Classified as a mini thread mill type, it features a 0.1260-inch cutting diameter, a 0.3700-inch length of cut, and a 1/4-inch (0.2500-inch) shank diameter. The three-flute geometry promotes efficient chip evacuation and consistent thread form. A TiAlN coating increases surface hardness and thermal resistance, extending tool life in demanding materials. This tool is intended for use by machinists and CNC operators working in precision machining environments.

This thread mill is suited for internal thread milling operations on CNC machining centers where helical interpolation is available. The 8-32 UNC thread specification makes it appropriate for fastener holes common in light mechanical assemblies, instrument panels, and electronics enclosures. At a 2.5000-inch overall length with a 2.1300-inch shank length, it provides adequate reach for standard-depth applications without sacrificing rigidity. It is intended for use in materials falling within material grade MT7, covering a range of steels, stainless steels, and similar workpiece materials.

Key Features

• Cuts 8-32 UNC internal threads at 32 teeth per inch via helical interpolation
• Solid carbide construction for rigidity and dimensional stability
• TiAlN coating for improved heat resistance and extended tool life
• 3-flute design supports efficient chip evacuation during thread milling
• Mini thread mill classification for use in small-diameter thread applications
• No coolant-through design; compatible with external coolant or mist delivery

Compatibility

Designed for internal thread milling of 8-32 UNC threaded holes on CNC machining centers capable of helical interpolation, using a 1/4-inch shank toolholder.

Installation Notes

Installation and operation should be performed by a qualified CNC machinist or tooling technician. Confirm that the machining center supports helical interpolation before programming the tool path. Secure the shank fully in a compatible 1/4-inch collet or toolholder and verify runout before cutting. Always power down and lock out the spindle when changing or inspecting tooling.