Vargus 58821 Laydown Threading Insert 8 Tpi Buttress

Product Description

The VARGUS 58821 is a solid carbide laydown threading insert designed for right-hand internal American Buttress thread forms at 8 threads per inch (TPI). Finished with a PVD-applied TiN coating, this insert delivers consistent thread geometry and extended tool life across a broad range of workpiece materials. The 12.70 mm inscribed circle and 4.76 mm thickness conform to standard indexable insert dimensions, making it a straightforward fit for compatible toolholders. It is intended for use by machinists and CNC operators working on precision threading applications where buttress thread profiles are required.

This insert is suited for internal buttress threading operations on materials spanning ferrous and non-ferrous metals as well as exotic alloys, reflecting its universal workpiece material classification. The 45-degree included angle and single tooth per side design are consistent with American Buttress thread standards per ANSI B1.9.1973. Typical installations include production threading on CNC lathes and turning centers where repeatable thread form accuracy is required. Solid carbide construction makes this insert appropriate for both light and interrupted cuts in a shop or manufacturing environment.

Key Features

• Right-hand internal American Buttress thread profile at 8 TPI per ANSI B1.9.1973
• Solid carbide substrate with PVD TiN coating for wear resistance and extended insert life
• 45-degree included angle with one cutting tooth per side for defined thread form
• 12.70 mm (1/2 inch) inscribed circle fits standard 4IR toolholder seats
• Universal workpiece material compatibility across material codes H, K, M, N, P, and S
• Manufactured under ISO 9001:2008 quality management standards

Compatibility

Designed as an OEM-style replacement insert for 4IR-style internal threading toolholders accepting a 12.70 mm inscribed circle laydown insert in the standard series configuration.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the turret is locked before indexing or replacing the insert. Use the appropriate torque wrench and insert screw as specified by the toolholder manufacturer when securing the insert. Verify thread form and pitch with a thread gauge after the first test pass before committing to full production runs.