Kennametal 1112953 Threading Insert NT4R KC730 Carbide

Product Description

The KENNAMETAL 1112953 is a carbide threading insert designed for precision thread cutting on CNC lathes and manual turning centers. Manufactured in the NT4R style and graded KC730, it carries a Titanium Nitride (TiN) finish applied via PVD coating process. The insert cuts a partial profile 60-degree thread form and handles both internal and external threading operations. With an included angle of 60 degrees and a corner radius of 0.17 mm (0.0067 inches), it delivers consistent thread geometry across a broad pitch range. Machinists and toolroom operators working with steel and cast iron applications install this insert into compatible Top Notch series toolholders.

This insert covers external pitch ranges of 1.25 to 6.25 mm (4 to 20 TPI) and internal pitch ranges of 2.00 to 6.25 mm (4 to 12 TPI), making it suited for a wide variety of threading tasks in production and job shop environments. It is appropriate for both roughing and finishing thread passes on ferrous materials classified under material grades C2, C3, and C4. Right-hand cutting geometry makes it the standard choice for conventional thread direction on turned components.

Key Features

• KC730 carbide grade with PVD-applied Titanium Nitride (TiN) coating for wear resistance on ferrous materials
• Partial profile 60-degree thread form cuts both internal and external threads
• External pitch range: 1.25 to 6.25 mm (4 to 20 TPI)
• Internal pitch range: 2.00 to 6.25 mm (4 to 12 TPI)
• Right-hand insert geometry for standard thread direction
• Top Notch series insert size 4 for direct drop-in fit to compatible toolholders

Compatibility

Designed for use with Top Notch series threading toolholders that accept NT insert style, size 4. Verify toolholder insert pocket specifications before installation.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or toolroom technician with the machine in a powered-down, locked-out state per applicable lockout/tagout procedures. Use the appropriate torque wrench and insert clamp screw specified for the Top Notch toolholder to seat the insert securely without over-torquing the clamping mechanism. Inspect the insert pocket for chips or debris before seating the new insert, as contamination can cause improper seating and thread form deviation. Replace the insert at first sign of chipping, edge wear, or degraded surface finish on threaded workpieces.