Carmex 21E14UNMT7 Carbide Thread Mill Insert 14 Tpi

Product Description

The CARMEX 21E14UNMT7 is a carbide thread mill insert designed for external thread milling operations. It carries a TiAlN finish and is built from submicron carbide in manufacturer grade MT7. The insert produces UN-standard external threads at 14 teeth per inch (TPI), conforming to ANSI B1.1-1989. It measures 0.185 inches in thickness. This insert is used by machinists and CNC tooling specialists in precision threading applications where consistent thread geometry and tool life are critical.

This insert is suited for external thread milling on CNC machining centers handling UN-standard threads at 14 TPI. The non-conical profile and submicron carbide substrate make it appropriate for ferrous and non-ferrous materials where wear resistance and surface finish quality are priorities. Typical install environments include job shops and production facilities running high-duty thread milling cycles. The insert style designation is 21E with an insert size code of 21.

Key Features

• Submicron carbide substrate in MT7 grade for extended tool life in demanding threading operations
• TiAlN coating provides heat and wear resistance during high-speed thread milling
• Produces external UN-standard threads at 14 TPI per ANSI B1.1-1989
• Non-conical insert geometry for consistent thread form across the full cutting depth
• Insert thickness of 0.185 inches ensures stable seating in compatible tool bodies
• Meets CE, ISO 9001:2015, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed as an OEM-style replacement insert for thread mill tool bodies accepting the 21E insert style with a size code of 21. Confirm holder compatibility by matching insert style, size code, and seating dimensions before installation.

Installation Notes

Thread mill inserts should be installed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque wrench and insert screw specified by the tool body manufacturer - do not overtighten, as carbide inserts are brittle and susceptible to fracture under excessive clamping force. Inspect the insert pocket for debris or damage before seating the new insert.