Vargus 53843 Threading Insert 12 Tpi Stub Acme Solid Carbide

Product Description

The VARGUS 53843 is a solid carbide laydown threading insert designed for cutting right-hand internal Stub Acme threads at 12 threads per inch (TPI). Manufactured in the VTX grade with a PVD-applied TiAlN coating, this insert delivers wear resistance and thermal stability across a broad range of workpiece materials. The 3IR insert style features a 9.53 mm (3/8 inch) inscribed circle, a thickness of 3.60 mm, and a 29-degree included angle. It conforms to ANSI B1.8:1988, making it suitable for precision thread-form accuracy in CNC turning and threading operations where Stub Acme profiles are required.

This insert is used in CNC lathes and turning centers for internal threading operations producing Stub Acme thread forms, commonly found in lead screws, actuators, power transmission components, and similar mechanical assemblies. The universal workpiece material classification covers a wide range of materials including steel, stainless steel, cast iron, non-ferrous alloys, high-temperature alloys, and hardened materials, making it a versatile choice for job shops and production machining environments.

Key Features

• Solid carbide VTX grade construction for consistent edge integrity and long tool life
• PVD TiAlN coating enhances heat resistance and reduces tool wear at elevated cutting speeds
• Right-hand internal threading in Stub Acme profile at 12 TPI per ANSI B1.8:1988
• 29-degree included angle conforms to Stub Acme thread-form geometry
• 3IR insert style with 3/8 inch (9.53 mm) inscribed circle fits standard 3IR toolholders
• Universal material code coverage supports steel, stainless, cast iron, non-ferrous, superalloys, and hardened workpieces

Compatibility

Designed for use with standard 3IR internal threading toolholders. Compatible with workpiece material groups H, K, M, N, P, and S as defined by common cutting tool material classification standards.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the turret is in a safe position before indexing or replacing inserts. Use the appropriate torque wrench and insert screw to seat the insert correctly in the toolholder pocket - refer to the toolholder manufacturer's clamping specifications. Verify thread form accuracy with a thread gauge after the first pass before proceeding with production runs.