Vargus 64427 Carbide Thread Mill Insert Un 28 Tpi

Product Description

The VARGUS 64427 is a carbide thread mill insert designed for external UN thread milling operations at 28 teeth per inch (TPI). Built from micrograin carbide in the VK2 material grade, this insert offers consistent cutting performance in demanding threading applications. The bright uncoated finish suits materials where coating adhesion or heat buildup is a concern. The 3E insert style features an inscribed circle diameter of 0.3750 inches, making it suitable for thread milling on CNC machining centers where precision thread form and tool life are priorities. Licensed machinists and CNC programmers working in production or job-shop environments are the primary users.

This insert is applied in external UN thread milling on CNC machining centers and mill-turn equipment. The UN thread standard covers Unified National thread forms common in general industrial, aerospace, and mechanical assembly work. At 28 TPI, this insert is suited for finer-pitch threading on smaller fastener profiles and precision components. It is sold individually per package, with a minimum order quantity of 10 units, making it appropriate for shops maintaining consistent insert stock for repeat threading programs.

Key Features

• Micrograin carbide substrate in VK2 grade for consistent edge integrity and wear resistance
• Bright uncoated finish produced via PVD process, suitable for applications where an uncoated edge is preferred
• External UN thread form at 28 TPI for fine-pitch unified national thread milling
• 3E insert style with 0.3750-inch inscribed circle diameter for precise tool body seating
• Single-piece package with 10-unit minimum order quantity for controlled inventory replenishment

Compatibility

Designed as an OEM-style replacement insert for VARGUS thread mill toolholders accepting the 3E insert style. Confirm toolholder seat geometry and insert style designation before ordering.

Installation Notes

Thread mill inserts are installed and replaced by machinists or CNC tooling technicians. Power down and lock out the spindle before seating or replacing inserts. Use the correct torque wrench and insert screw specified by the toolholder manufacturer - do not overtighten, as micrograin carbide inserts are brittle under clamping stress. Verify insert seating and runout with a dial indicator before initiating a threading program.