Kennametal 1113817 Threading Insert NTP4L KC850 Carbide

Product Description

The KENNAMETAL 1113817 is a carbide threading insert in the Top Notch series, designed for precision thread-cutting operations on both internal and external workpieces. Coated via CVD with a TiC/TiCN/TiN multilayer finish, this left-hand insert handles a 60-degree partial profile thread standard across a wide pitch range: 1.25 to 6.25 mm (4 to 20 TPI) for external threads and 2.00 to 6.25 mm (4 to 12 TPI) for internal threads. The KC850 grade, rated C5/C6, delivers the wear resistance and edge toughness required for demanding threading applications on ferrous and non-ferrous materials. Tip-to-top height measures 3.25 mm (0.1280 inches) with a corner radius of 0.17 mm (0.0065 inches).

This insert is suited for CNC lathes and turning centers where consistent thread form and surface finish are required. The NTP4L style seats into compatible Top Notch toolholders and is appropriate for production threading in job shops, aerospace component machining, and general metalworking environments. The left-hand orientation accommodates specific toolpath and spindle direction requirements. It covers a broad pitch range in a single insert, reducing the number of tools needed for mixed-thread production runs.

Key Features

• CVD-applied TiC/TiCN/TiN multilayer coating for extended tool life in abrasive and interrupted cuts
• 60-degree partial profile thread form supports a wide range of thread standards without per-pitch inserts
• 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)
• Left-hand cut geometry for specific spindle and toolpath configurations
• KC850 carbide grade (C5/C6) balances hardness and toughness for steel and cast iron threading

Compatibility

Designed for use in Top Notch series toolholders accepting NTP style inserts, size 4. Verify toolholder designation and clamping style before ordering to confirm fitment with existing tooling setups.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or toolroom technician with the machine powered down and in a locked-out state. Use the correct torque driver or clamping screw as specified by the toolholder manufacturer - do not overtighten, as this can fracture the insert. Confirm insert seating and clamping clamp integrity before resuming spindle operation. Follow your facility's tooling change procedures and applicable shop safety standards.