Vargus 52366 Threading Insert 16 Tpi Stub Acme Solid Carbide

Product Description

The VARGUS 52366 is a solid carbide laydown threading insert designed for external Stub Acme thread cutting at 16 threads per inch (TPI). Built to the 3ER insert style with a 9.53 mm (3/8 inch) inscribed circle and a thickness of 3.60 mm, this insert features a TiAlN coating applied via PVD process for extended tool life across a wide range of workpiece materials. The 29-degree included angle matches the Stub Acme thread form per ANSI B1.8:1988. Right-hand orientation makes it a direct fit for standard external threading operations on CNC lathes and threading centers.

This insert is suited for external Stub Acme threading applications in both production and job-shop environments. The VTX manufacturer grade combined with TiAlN coating supports universal workpiece compatibility, including steel, stainless, cast iron, non-ferrous metals, high-temperature alloys, and plastics. It is a practical choice for machinists producing lead screws, power transmission components, and actuator threads where the Stub Acme profile is specified. The single-tooth-per-side geometry provides controlled thread form accuracy on each pass.

Key Features

• Solid carbide construction with TiAlN PVD coating for wear resistance across universal workpiece materials
• Right-hand external Stub Acme thread form, 16 TPI, 29-degree included angle per ANSI B1.8:1988
• 3ER insert style, size code 3, with 9.53 mm inscribed circle (3/8 inch)
• VTX grade designation for high-performance threading on steel, stainless, cast iron, non-ferrous, and superalloy materials
• Single tooth per side geometry for precise thread form control
• ISO 9001:2008 certified manufacturing process

Compatibility

Designed as an OEM-style replacement threading insert for 3ER-style insert toolholders accepting a 3/8-inch inscribed circle laydown insert. Compatible with workpiece material groups H, K, M, N, P, and S per standard material classification.

Installation Notes

Installation should be performed by a qualified machinist familiar with CNC lathe tooling and threading insert change procedures. Power down and lock out the machine spindle before seating or removing the insert. Verify the insert is fully seated and the clamping screw is torqued per the toolholder manufacturer specification before resuming cuts. Inspect the insert seating pocket for chips or debris prior to each insert change to maintain thread form accuracy.