Tool-flo 0241040AC50E On-edge Threading Insert Acme 4 Tpi

Product Description

The TOOL-FLO 0241040AC50E is a solid carbide, on-edge threading insert designed for cutting Acme thread forms on both external and internal thread applications. It carries a TiAlN coating applied via PVD process, which provides thermal resistance and extended tool life in demanding cutting conditions. The insert features a neutral cutting direction and neutral rake geometry, a 0.5-inch inscribed circle (IC), and operates at 4 threads per inch (TPI) for both external and internal profiles. Machinists and CNC operators install this insert into compatible on-edge threading toolholders for single-point thread milling or turning operations on ferrous workpiece materials.

This insert is suited for threading operations on cast iron and steel workpieces in production machining environments. The Acme thread form is common in power transmission applications such as lead screws, jack screws, and linear actuator components. The neutral hand geometry makes this insert compatible with both left-hand and right-hand threading setups without requiring a dedicated hand-specific insert. It is appropriate for CNC lathes and threading centers where consistent thread form accuracy is required across medium to high production volumes.

Key Features

• Acme thread form for both external and internal threading at 4 TPI
• Solid carbide substrate with PVD-applied TiAlN coating for heat and wear resistance
• Neutral cutting direction and neutral rake for versatile left- and right-hand setups
• 0.5-inch inscribed circle (IC) with 0.187-inch thickness for rigid on-edge seating
• Primary workpiece compatibility with cast iron and steel (ISO material groups K and P)
• On-edge insert series design for secure clamping and repeatable thread form indexing

Compatibility

Designed for use in on-edge threading toolholders that accept TNMC-style inserts with a size code 43 and a 0.5-inch IC. Intended for Acme thread form applications on cast iron and steel workpieces.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the toolholder is secured before indexing or replacing inserts. Use the correct torque wrench and insert screw specified by the toolholder manufacturer - do not overtighten the clamping screw, as this can fracture the carbide substrate. Verify thread form accuracy with a thread gauge after the first pass before committing to a full production run.