Tool-flo 604600LN4E Threading Insert GP50 Carbide 4-20 Tpi

Product Description

The TOOL-FLO 604600LN4E is a carbide threading insert in the Flo-Lock series, designed for both internal and external thread-cutting operations on CNC lathes and manual turning centers. The insert carries a GP50 manufacturer grade with a C5/C6 material grade carbide substrate and is finished with a Titanium Nitride (TiN) coating applied via a PVD process. It cuts a 60-degree V-thread profile and is configured for left-hand thread orientation. External pitch coverage runs 4-20 TPI and internal pitch coverage runs 4-12 TPI, making it a versatile choice for a wide range of threading work in ferrous and non-ferrous materials.

This insert is suited for production threading applications in job shop and high-volume machining environments. The FLT-4L style with integrated chipbreaker (CB) geometry is typically used in applications where chip control during threading passes is a priority. Left-hand configurations are common in applications requiring reverse-thread fasteners or left-hand leadscrew work. Machinists and CNC operators working with standard inch-thread specifications will find the 4-20 TPI range covers many common fastener and fitting thread forms.

Key Features

• GP50 grade carbide with C5/C6 material grade for general-purpose threading on a range of workpiece materials
• Titanium Nitride (TiN) finish coating applied via PVD process for improved wear resistance and tool life
• 60-degree V-thread form covers both internal (4-12 TPI) and external (4-20 TPI) thread cutting
• Left-hand insert orientation for reverse-thread and specialty threading applications
• Integrated chipbreaker (CB) geometry aids chip evacuation during threading passes
• Flo-Lock series toolholder compatibility for positive insert retention and repeatable positioning

Compatibility

Designed for use with TOOL-FLO Flo-Lock series threading toolholders accepting FLT-4L style inserts. Verify toolholder seat geometry and insert size 4 specification before installation.

Installation Notes

Threading inserts of this type are installed and replaced by machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque driver for the insert clamping screw - avoid overtightening, which can fracture the carbide. Inspect the insert seat and clamping components for wear or debris before seating a new insert to ensure proper contact and repeatability.