Kennametal 1113511 Threading Insert NTP3L K68 Carbide

Product Description

The KENNAMETAL 1113511 is a carbide threading insert designed for precision thread-cutting operations on both internal and external threads. Manufactured in the NTP3L style and produced in the K68 carbide grade with a bright, uncoated finish, this insert is engineered for the Top Notch series tooling system. It cuts a partial profile 60-degree thread form and is suited for left-hand thread applications. The insert handles external pitches from 1.25 to 4.00 mm (6 to 20 TPI) and internal pitches from 2.00 to 5.00 mm (5 to 12 TPI). A corner radius of 0.17 mm (0.0065 inches) contributes to consistent thread geometry across production runs.

This insert is appropriate for threading operations in both turning centers and manual lathes where left-hand thread profiles are required. Typical applications include production threading of external fastener forms and internal thread forms on workpieces requiring 60-degree partial profile geometry. The uncoated K68 carbide grade performs in a range of workpiece materials classified under material grade C3, making it a suitable choice in job shop and production environments where thread accuracy and insert consistency are priorities.

Key Features

• Carbide construction, K68 grade, uncoated bright finish for direct visual wear monitoring
• Cuts partial profile 60-degree thread forms on both internal and external threads
• Left-hand insert style (NTP3L) for left-hand thread applications
• External pitch range: 1.25 to 4.00 mm (6 to 20 TPI)
• Internal pitch range: 2.00 to 5.00 mm (5 to 12 TPI)
• Top Notch series compatibility for repeatable indexing and seating

Compatibility

Designed for use with Kennametal Top Notch series threading toolholders that accept size 3 NTP-style inserts. Consult the Top Notch system toolholder documentation to confirm correct pocket geometry and clamping configuration before use.

Installation Notes

Threading insert installation and indexing should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before removing or seating any insert. Use the appropriate Torx or clamping key specified for the Top Notch toolholder to avoid overtightening, which can fracture the carbide. Inspect the insert pocket for chips or debris before seating each new insert to ensure proper support and thread accuracy.