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The VARGUS 52034 is a solid carbide laydown threading insert engineered for left-hand internal UN thread cutting at 12 threads per inch. The insert features a TiAlN coating applied via PVD process, providing thermal resistance and wear performance across a wide range of workpiece materials. It carries an insert style designation of 3IL with a 60-degree included angle, a 3/8-inch (9.53 mm) inscribed circle, and a thickness of 3.60 mm. Licensed machinists and CNC lathe operators install this insert into compatible laydown threading toolholders for precision internal threading operations on turned components.
This insert is suited for internal UN thread applications on universal workpiece materials, including carbon steels, stainless steels, cast irons, non-ferrous metals, high-temperature alloys, and titanium alloys, covering material codes H, K, M, N, P, and S. It is used in production and job-shop turning environments on CNC lathes and manual engine lathes where left-hand internal UN threads are required. The single-tooth-per-side geometry provides a controlled threading profile consistent with ANSI B1.1:74 thread standards.
Designed as an OEM-style replacement laydown threading insert for 3IL-style internal threading toolholders accepting a 3/8-inch inscribed circle insert. Verify toolholder pocket specifications before installation.
This insert is installed and replaced by machinists trained in CNC or manual lathe tooling. Always index or replace inserts with the machine powered down and the spindle fully stopped. Use the correct torque wrench and insert screw specified by the toolholder manufacturer when securing the insert - do not overtighten by hand estimation. Confirm thread hand, TPI, and insert style against the toolholder and workpiece drawing before beginning a threading cycle.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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