Carmex 16ER18UNBMA Threading Insert 18 Tpi Solid Carbide

Product Description

The CARMEX 16ER18UNBMA is a solid carbide laydown threading insert designed for external UN thread cutting at 18 threads per inch. It features a 60-degree included angle, a 3/8 inch (0.375 inch) inscribed circle, and a thickness of 0.146 inches. The PVD-applied TiAlN coating provides wear resistance across a broad range of workpiece materials. This is a right-hand insert intended for use on CNC lathes and turning centers where precision external threading is required. Machinists and toolroom professionals install this insert into compatible 16 ER style toolholders for high-accuracy thread form generation.

This insert is suited for external UN threading operations in both production and job-shop environments. The submicron carbide grade and universal material designation make it applicable across a wide range of materials including steels, stainless alloys, cast irons, nonferrous metals, and high-temperature alloys. It is a practical choice for shops threading fastener features, fittings, and mechanical components to UN thread standards.

Key Features

• Solid carbide submicron grade for extended tool life and edge integrity
• TiAlN PVD coating for heat resistance and reduced flank wear
• 18 TPI UN thread form with 60-degree included angle for standard UN profile accuracy
• Right-hand external thread orientation for conventional lathe threading passes
• 3/8 inch inscribed circle with 0.146 inch thickness for 16 ER style toolholder seating
• Certified to CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use in 16 ER style laydown threading toolholders for external UN thread applications. Suitable for workpiece materials with primary material codes H, K, M, N, P, and S, covering a universal range of metals.

Installation Notes

This insert is installed and replaced by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the machine is in a safe, locked-out state before changing inserts. Seat the insert firmly and evenly in the toolholder pocket and verify clamp torque is within the toolholder manufacturer specifications. Inspect the insert seating surface and pocket for chips or contamination before installation to maintain thread form accuracy.