Kennametal 4109626 Threading Insert Carbide Altin 5 Tpi

Product Description

The KENNAMETAL 4109626 is a carbide threading insert in the Top Notch series, designed for cutting Acme threads in both internal and external applications. Manufactured from carbide with a PVD-applied AlTiN finish, this insert delivers wear resistance and thermal stability suited to production threading environments. It is a left-hand insert with a 5 TPI internal pitch and an included angle of 29 degrees, matching the Acme thread standard. The cutting tip width is 0.0689 inches (1.75 mm) and the corner radius is 0.0050 inches (0.13 mm). Insert thickness is 0.1949 inches (4.95 mm) with a tip-to-top dimension of 0.1492 inches. This insert is sized as an NA insert size 3 and is installed by machinists and tooling technicians on CNC and manual lathes.

This insert is used in threading operations requiring Acme thread profiles on workpieces ranging from lead screws to power transmission components, in both internal bores and external diameters. The left-hand orientation makes it appropriate for left-hand thread applications in industries such as manufacturing, aerospace, and general machining. It is sold individually per package with a minimum order quantity of 5 units, making it suitable for shop stocking as a production consumable.

Key Features

• Carbide substrate with PVD AlTiN finish for extended tool life in abrasive and high-temperature cuts
• Acme thread standard, 29-degree included angle, 5 TPI pitch
• Left-hand insert for left-hand thread applications
• Supports both internal and external threading operations
• Top Notch series insert style NA, size 3
• Precise corner radius of 0.0050 inches (0.13 mm) for accurate thread root geometry

Compatibility

Designed for use with Kennametal Top Notch series threading toolholders that accept NA-style, size 3 inserts.

Installation Notes

Threading inserts of this type are installed and changed by machinists using the appropriate torx or hex key specified for the Top Notch toolholder. Ensure the machine spindle is fully stopped and locked out before indexing or replacing inserts. Seat the insert firmly against the pocket locating surfaces and confirm clamp engagement before resuming cuts. Do not exceed the toolholder's rated depth-of-cut or feed rate for the insert size.