Carmex 16ER27NPTFMXC Threading Insert 27 Tpi Nptf Carbide

Product Description

The CARMEX 16ER27NPTFMXC is a solid carbide laydown threading insert designed for external NPTF thread cutting on CNC lathes and turning centers. Built in a 16 ER insert style with a 27 threads-per-inch (TPI) pitch, this insert targets tapered pipe thread profiles used in sealing applications across industrial and mechanical systems. The micrograin carbide substrate carries a PVD-applied titanium nitride (TiN) coating in the MXC grade, delivering edge hardness and wear resistance across a broad range of workpiece materials. Licensed machinists and CNC operators in production shops are the primary users.

This insert suits right-hand external NPTF threading operations on general-purpose turning equipment. The NPTF thread standard is required where pressure-tight pipe joints must seal without compound or tape, making this insert applicable in hydraulic, pneumatic, and fluid-transfer component manufacturing. The 16 ER insert style fits compatible ER-series toolholders. The universal primary workpiece material classification covers carbon steel, stainless steel, cast iron, non-ferrous metals, and high-temp alloys, reflecting the breadth of the MXC micrograin grade.

Key Features

• Solid carbide micrograin substrate in manufacturer grade MXC for extended tool life
• PVD TiN coating increases surface hardness and reduces built-up edge
• 27 TPI pitch cuts NPTF tapered external pipe threads
• Right-hand cutting geometry, 30-degree included angle
• 3/8 inch inscribed circle with 0.146 inch thickness fits standard 16 ER toolholders
• Universal material compatibility: carbon steel, stainless, cast iron, non-ferrous, and high-temp alloys

Compatibility

Designed for use in 16 ER-style laydown threading toolholders that accept a 3/8 inch inscribed circle insert. Refer to your toolholder manufacturer specifications to confirm pocket geometry and clamping compatibility before installation.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine before seating or changing the insert. Confirm the insert pocket is clean and free of chips before clamping, as debris under the insert seat affects thread accuracy and can fracture the carbide. Always verify toolholder torque requirements per the toolholder manufacturer documentation rather than estimating.