Carmex MTS0250C4932UN Thread Mill 8-32 Internal Carbide

Product Description

The CARMEX MTS0250C4932UN is a helical flute thread mill designed for cutting internal 8-32 UNC threads in precision machining applications. Built from solid carbide with a TiAlN coating, it delivers consistent thread quality and extended tool life in demanding cutting environments. The mini thread mill design features 3 flutes and a 0.2500 inch shank diameter, with a cutting diameter of 0.1260 inches and a length of cut of 0.4900 inches. The overall length is 2.5000 inches. This tool is run on CNC machining centers by skilled machinists and tool-and-die professionals requiring accurate internal thread profiles.

This thread mill is suited for use in production and job-shop environments where 8-32 UNC internal threads are required. Its solid carbide construction and TiAlN finish make it appropriate for use in ferrous and non-ferrous workpiece materials where heat resistance and wear performance are priorities. The helical flute geometry supports chip evacuation during the thread milling cycle. This tool does not include coolant-through capability, so external coolant application or appropriate cutting fluid is standard practice for this configuration.

Key Features

• Solid carbide construction with TiAlN coating for heat and wear resistance
• Helical flute geometry aids chip evacuation during internal thread milling
• 3-flute design for balanced cutting performance on 8-32 UNC threads
• Mini thread mill type suitable for small-diameter internal thread applications
• Material Grade MT7 carbide substrate for toughness in demanding cuts
• No coolant-through design; compatible with external coolant delivery

Compatibility

Designed for cutting internal 8-32 UNC threads on CNC machining centers. Compatible with standard 1/4 inch tool holders and collet systems accepting a 0.2500 inch shank diameter.

Installation Notes

This tool is installed and operated by machinists on CNC milling equipment. Confirm proper collet or tool holder torque specifications per your machine tool manufacturer before use. Tool runout should be verified with a dial indicator prior to cutting to ensure thread accuracy. Follow all machine guarding and PPE requirements per applicable shop safety standards when operating rotating cutting tools.