Kennametal 1112926 Threading Insert Carbide KC730 Acme 4 Tpi

Product Description

The KENNAMETAL 1112926 is a carbide threading insert designed for cutting Acme-form threads in both internal and external applications. It carries the KC730 manufacturer grade with a Titanium Nitride (TiN) finish applied via PVD coating, which improves surface hardness and wear resistance during thread-cutting operations. The insert is left-hand oriented, suited for 4 TPI Acme thread profiles with a 29-degree included angle. It belongs to the Top Notch series and is sized at Insert Size 3. Machinists and CNC operators working on lathes and threading centers use this insert for Acme-threaded components such as lead screws, jacks, and actuators.

This insert fits internal and external Acme thread applications at 4 TPI. The left-hand configuration makes it appropriate for left-hand lead screws and similar components where standard right-hand inserts cannot be used. The KC730 grade with PVD TiN coating performs well in C2, C3, and C4 material grades, covering a range of cast iron, non-ferrous, and general-purpose turning applications. The Top Notch series provides consistent seating and indexing in compatible toolholders. This insert is sold individually but is subject to a minimum order quantity of 5 units.

Key Features

• KC730 carbide grade with PVD-applied Titanium Nitride coating for extended tool life
• Left-hand Acme thread profile at 4 TPI with 29-degree included angle
• Cuts both internal and external threads in a single insert style
• Insert Size 3 in the Top Notch series for reliable toolholder registration
• Compatible with C2, C3, and C4 material grades
• Tip to top of insert measures 0.1331 inches (3.38 mm); thickness 0.1949 inches (4.95 mm)

Compatibility

Designed as an OEM-style replacement threading insert for Top Notch series toolholders accepting NA-style, Size 3 inserts for Acme internal and external threading operations.

Installation Notes

This insert is installed and indexed by a qualified machinist or CNC tooling technician. Power down and lock out the machine before changing inserts. Use the appropriate torx or clamping key specified by the toolholder manufacturer to seat the insert firmly — do not overtighten by hand estimation. Inspect the seating pocket for chips or debris before installing a fresh insert to ensure full contact and accurate thread geometry.