Kennametal 1182166 Threading Insert NTB3LB KC730 Carbide

Product Description

The KENNAMETAL 1182166 is a carbide threading insert in the Top Notch series, designed for cutting American Buttress threads in both internal and external applications. Manufactured to grade KC730 with a Titanium Nitride (TiN) finish applied via PVD coating process, this left-hand insert handles a pitch range of 8 to 16 TPI. The 45-degree included angle and tight corner radius of 0.0065 inches make it well suited for precision thread-form work on ferrous and non-ferrous workpiece materials. Machinists and toolroom operators working on CNC lathes and manual threading operations rely on this insert for consistent buttress thread profiles.

This insert is intended for shops and production environments where American Buttress thread forms are required on internal or external features. The left-hand orientation must be matched to the appropriate Top Notch toolholder. It is suited for use on material grades C2, C3, and C4, covering a broad range of cast iron and non-ferrous cutting applications. The insert size 3 fits compatible Top Notch series toolholders. Sold individually per package, with a minimum order quantity of 5 units.

Key Features

• KC730 carbide grade with PVD-applied Titanium Nitride (TiN) coating for wear resistance
• American Buttress thread standard, internal and external thread capability
• Left-hand insert orientation for correct helix direction
• Pitch range of 8 to 16 TPI for versatile buttress thread cutting
• 45-degree included angle with 0.0065-inch corner radius for accurate thread form
• Top Notch series insert — must be paired with a compatible Top Notch toolholder

Compatibility

Designed for use with Top Notch series toolholders accepting an NTB size 3 insert. Compatible with workpiece material grades C2, C3, and C4 as rated for this carbide grade and coating combination.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine fully stopped and the spindle locked out. Seat the insert firmly in the toolholder pocket and torque the clamping screw to the toolholder manufacturer specification found in the holder documentation. Verify left-hand orientation is correct for the thread direction before commencing a cut. Inspect the insert edge condition regularly, as chipped or worn inserts will produce out-of-tolerance thread forms.