Carmex 30I12UNMT7 Carbide Thread Mill Insert 12 Tpi

Product Description

The CARMEX 30I12UNMT7 is a carbide thread mill insert engineered for internal UN threading operations. Manufactured from submicron carbide with a TiAlN finish, this insert provides wear resistance and thermal stability during thread milling on CNC machining centers. It carries the MT7 manufacturer grade designation and is designed to produce internal threads at 12 teeth per inch. The insert thickness measures 0.2170 inches. Machinists and CNC operators in production shops and job shops install this type of insert when thread milling is preferred over tapping, particularly in hardened materials or blind-hole applications where tap breakage is a concern.

This insert is suited for internal UN thread milling in ferrous and non-ferrous materials where consistent thread form and finish are required. It follows the ANSI B1.1-1989 standard for Unified National thread forms. Typical applications include aerospace, automotive, and general metalworking environments where tight thread tolerances are maintained on CNC machining centers. The non-conical geometry and 30I insert style make it compatible with thread mill bodies designed for that insert configuration.

Key Features

• Submicron carbide substrate for improved hardness and edge retention
• TiAlN finish for thermal resistance and extended tool life in dry or semi-dry cutting
• 12 teeth per inch for UN internal thread milling per ANSI B1.1-1989
• MT7 grade designation engineered for thread milling performance
• Non-conical insert geometry in the 30I insert style
• Thickness of 0.2170 inches for precise seating in compatible tool bodies

Compatibility

Designed for use with thread mill bodies that accept the 30I insert style. Intended for internal UN threading applications conforming to the ANSI B1.1-1989 standard.

Installation Notes

Thread mill inserts are installed and replaced by CNC machinists or tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the correct torque wrench or insert key specified by the tool body manufacturer when seating the insert - do not overtighten by hand. Verify insert seating and runout before resuming cutting operations.