Tool-flo 0139000N4C On-edge Threading Insert 60V Internal

Product Description

The TOOL-FLO 0139000N4C is a solid carbide on-edge threading insert designed for internal threading operations on CNC lathes and turning centers. Configured in a neutral hand cutting direction with a neutral rake angle, this insert cuts 60-degree V-form threads across a range of 5 to 24 threads per inch (TPI). The 1/2-inch inscribed circle (IC) seats into compatible toolholders for rigid, repeatable positioning. A PVD-applied Titanium Nitride (TiN) coating reduces friction and extends cutting life on ferrous materials. Manufactured to grade GP50, the insert carries an TNMA style designation and suits production-volume threading where consistent thread form and tool life are the priority.

This insert is intended for internal threading of cast iron and steel workpieces in machining environments where 60-degree V-form threads are required. The 5-24 TPI range covers a broad spectrum of standard thread sizes, making the 0139000N4C suitable for general-purpose production threading in job shops, manufacturing facilities, and contract machining operations. A licensed machinist or CNC programmer installs and qualifies this insert at the machine.

Key Features

• 60-degree V-form thread profile for standard internal threading applications
• 5-24 TPI cutting range covers a wide variety of common thread sizes
• Solid carbide substrate, grade GP50, with PVD Titanium Nitride (TiN) coating for wear resistance
• Neutral hand, neutral rake configuration for versatile toolholder pairing
• 1/2-inch IC, TNMA insert style for secure, repeatable seating
• Corner radius of 0.003 inches (maximum 0.005 inches) for controlled thread form accuracy

Compatibility

Designed as an OEM-style on-edge threading insert compatible with toolholders accepting a 1/2-inch IC TNMA-style insert for internal 60-degree V-form threading applications.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Power down and lock out the machine spindle before changing inserts. Use the appropriate torx or hex key to seat the insert securely in the toolholder pocket without overtightening the clamping screw. Verify thread form and fit with a calibrated thread gauge after the first pass before committing to production runs.