Vargus 54175 Carbide Turning Insert 3IR 18UN VK2P

Product Description

The VARGUS 54175 is a carbide turning insert designed for internal thread milling on UN-standard threads. Configured in the 3IR style with an 18 UN thread form, this insert carries the VK2P manufacturer grade and is manufactured from uncoated carbide with a PVD coating process. It fits a right-hand cutting orientation and is sized for a 3/8-inch inscribed circle. Machinists and CNC operators install this insert in boring bars and threading toolholders for precision internal thread generation on ferrous and non-ferrous workpieces.

This insert is suited for internal threading operations on lathes and turning centers where UN-standard thread profiles are required. The 3IR style and 18 UN designation make it appropriate for production threading of fastener bores, hydraulic fittings, and other components requiring ANSI B1.1:74-compliant thread forms. It is a single-use, indexable insert sold individually, with a minimum order quantity of 10 pieces per order.

Key Features

• 3IR insert style for internal threading applications
• 18 UN thread form conforming to ANSI B1.1:74 standard
• VK2P grade carbide with PVD coating process
• Right-hand cutting orientation
• 3/8-inch inscribed circle for compatible toolholder fitment
• Uncoated carbide substrate suitable for precise thread form control

Compatibility

Designed as an OEM-style indexable replacement insert for internal threading toolholders accepting the 3IR insert style with a 3/8-inch inscribed circle.

Installation Notes

Installation is performed by machinists or CNC tooling specialists. Power down and de-energize the machine before indexing or replacing inserts. Use the appropriate torque wrench and insert screw to secure the insert in the toolholder pocket - do not overtighten by hand. Follow the toolholder manufacturer's seating and clamping procedure to ensure correct thread-form registration.