Carmex 16ER10STACMEMXC Threading Insert 10 Tpi Stub Acme

Product Description

The CARMEX 16ER10STACMEMXC is a solid carbide laydown threading insert designed for external Stub Acme thread cutting at 10 threads per inch. Built from micrograin carbide and finished with a PVD-applied TiN coating, this insert delivers consistent thread form and extended tool life on a wide range of workpiece materials. The 29-degree included angle matches the Stub Acme thread standard, making it a direct-fit choice for machinists producing lead screws, power transmission components, and actuator hardware. It seats in the laydown position for rigid, repeatable setup on compatible external threading toolholders.

This insert is suited for turning centers and CNC lathes performing external Stub Acme threading operations in production and job-shop environments. The MXC micrograin carbide grade performs across a broad material spectrum, covering steels, stainless, cast iron, non-ferrous alloys, heat-resistant superalloys, and hardened materials. It is a right-hand insert, meaning it cuts with the spindle rotating conventionally and the tool feeding toward the chuck. Machinists running high-volume threading passes or finishing critical lead screw profiles will find the TiN coating helps maintain edge sharpness over extended run times.

Key Features

• Solid micrograin carbide substrate for rigidity and edge integrity
• PVD TiN coating reduces friction and extends cutting life
• 29-degree included angle conforms to the Stub Acme thread standard
• 10 TPI external thread form, right-hand cutting orientation
• 3/8 inch inscribed circle fits standard 16ER-series external threading holders
• Universal material grade compatible with steel, stainless, cast iron, non-ferrous, superalloy, and hardened workpieces

Compatibility

Designed for use in 16ER-series external threading toolholders that accept a 3/8 inch inscribed circle laydown insert. Compatible with workpiece material codes H, K, M, N, P, and S covering the full range of common machined metals.

Installation Notes

Installation is performed by a machinist or CNC tooling technician. Power down the machine and confirm the spindle is fully stopped before seating or removing any insert. Use the correct torque wrench and insert screw specified by the toolholder manufacturer to secure the insert - do not over-tighten by hand. Verify insert seating and thread form with a thread gauge before running a full production pass.