Kennametal 1182375 Threading Insert K68 Carbide 16-20 Tpi

Product Description

The KENNAMETAL 1182375 is a carbide threading insert in the Top Notch series, designed for cutting American Buttress threads on both internal and external applications. It carries the NTB2RA insert style with a K68 manufacturer grade and an equivalent C3 material grade, making it well suited for threading operations in harder ferrous and exotic materials. The uncoated bright finish allows close inspection of the cutting edge and is appropriate for applications where coating adhesion could interfere with thread form accuracy. The included angle measures 45 degrees, with a corner radius of 0.0031 inches and a tip-to-top height of 0.1260 inches. This insert is installed and serviced by machinists and CNC turning specialists working in production or job-shop environments.

This insert handles a pitch range of 16 to 20 TPI on the American Buttress thread standard, making it applicable to power transmission components, jack screws, and heavy-load linear motion hardware where the asymmetric Buttress profile is specified. It is a right-hand insert intended for standard right-hand thread cutting passes. The Top Notch series provides a repeatable, positive-lock seating system that maintains consistent insert positioning across tool changes, which is critical for holding thread form tolerances in repeat production runs.

Key Features

• American Buttress thread form with a 45-degree included angle for asymmetric load-bearing thread profiles
• Pitch range of 16-20 TPI covers common Buttress thread applications in power transmission and structural assemblies
• K68 carbide grade with uncoated bright finish for sharp cutting edges and straightforward edge inspection
• Handles both internal and external threading operations with the same insert geometry
• Right-hand cutting orientation for standard thread direction passes
• Top Notch series seating system maintains repeatable insert positioning across tool changes

Compatibility

Designed for use with Kennametal Top Notch series threading toolholders that accept NTB-style inserts in size 2. Verify toolholder insert pocket specifications before ordering to confirm proper seating and clamping.

Installation Notes

Threading inserts should be seated and clamped by qualified machinists following the toolholder manufacturer's torque and clamping guidelines. Power down and lock out the machine spindle before changing inserts. Inspect the insert pocket and clamping screw for wear or debris before seating a new insert, as contamination in the pocket will affect thread form accuracy. Handle carbide inserts with care to avoid chipping the cutting edges prior to use.