Iscar 5901934 Laydown Threading Insert 16IR IC908

Product Description

The ISCAR 5901934 is a laydown-style threading insert designed for internal UN thread-form cutting at 16 threads per inch (TPI). Built from solid carbide in ISCAR grade IC908, the insert features a PVD-applied TiN/TiAlN coating over a submicron carbide substrate, providing wear resistance across a wide range of workpiece materials. The 16IR insert style is right-hand orientation, sized with a 3/8 inch (9.53 mm) inscribed circle and a 0.1430 inch thickness. A 0.0040 inch corner radius finishes the cutting geometry. Licensed machinists and CNC lathe operators install this insert in compatible ISCAR ISCARTHREAD boring bars and holders for precision internal threading operations.

This insert is suited for internal threading on CNC turning centers and manual lathes. The UN thread standard and 16 TPI specification make it applicable to common unified national thread forms found in industrial and manufacturing environments. The IC908 grade and universal primary workpiece material rating allow use across steel, stainless, cast iron, non-ferrous, and high-temp alloy materials, identified by ISO material codes H, K, M, N, P, and S. It is a single-insert unit sold in minimum order quantities of 5.

Key Features

• IC908 submicron solid carbide grade with PVD TiN/TiAlN coating for extended tool life
• 16IR insert style, right-hand cut, for internal UN threading at 16 TPI
• 3/8 inch (9.53 mm) inscribed circle with 0.1430 inch insert thickness
• 0.0040 inch corner radius for accurate thread-form definition
• Compatible with ISO material codes H, K, M, N, P, and S — universal workpiece coverage
• Chipbreaker designation B; compliant with ISO 13399 tooling data standards

Compatibility

Designed for use in ISCAR ISCARTHREAD series internal threading holders and boring bars that accept the 16IR laydown insert style with a 3/8 inch inscribed circle seating geometry.

Installation Notes

Insert replacement should be performed with the machine fully powered down and the spindle locked. Use the correct torque wrench and ISCAR-specified clamping screw to seat the insert firmly without over-torquing the pocket. Verify insert orientation is right-hand before beginning a threading pass. Confirm thread pitch setup and trial-cut on scrap material before committing to finish dimensions on a production part.