Kennametal 1112986 Threading Insert KC730 Carbide 8 Tpi

Product Description

The KENNAMETAL 1112986 is a carbide threading insert designed for cutting Stub Acme thread profiles at 8 threads per inch (TPI). It carries a Titanium Nitride (TiN) finish applied via PVD coating process and is part of the Top Notch series. The KC730 grade is a coated carbide grade suited for threading operations across a range of workpiece materials. With a 29-degree included angle and a right-hand cutting orientation, this insert handles both internal and external thread forms. It measures 0.1949 inches in thickness and has a corner radius of 0.0480 inches, making it appropriate for precision threading in production and job-shop environments. Installation is performed by machinists and CNC operators.

This insert is intended for Stub Acme threading applications on CNC lathes and manual turning centers where accurate thread profile control is required. The NAS insert style fits Top Notch toolholders designed for that system. It is suitable for use on ferrous and non-ferrous materials falling within material grades C2, C3, and C4. Both internal threading and external threading applications are supported, giving it flexibility across common turning setups where Stub Acme profiles are specified.

Key Features

• KC730 coated carbide grade with PVD-applied Titanium Nitride finish for wear resistance in threading operations
• Stub Acme thread profile at 8 TPI with a 29-degree included angle
• Right-hand cutting orientation; supports both internal and external thread types
• Top Notch series NAS insert style for use with compatible Top Notch toolholders
• Corner radius of 0.0480 inches for controlled root form geometry
• Insert size 3; thickness of 0.1949 inches for consistent seating in the pocket

Compatibility

Designed for use with Top Notch series toolholders accepting NAS-style inserts. Suitable for material grades C2, C3, and C4 in Stub Acme threading applications requiring an 8 TPI, 29-degree profile.

Installation Notes

This insert is seated and secured by a machinist or CNC operator following standard Top Notch toolholder clamping procedures. Power down and lock out the machine spindle before changing inserts. Inspect the toolholder pocket for chips or debris before seating the new insert to ensure proper contact and accurate thread profile. Follow the toolholder manufacturer torque specifications for the clamping screw.