Tool-flo 0239041AC50E Stub Acme Threading Insert 0.5 in

Product Description

The TOOL-FLO 0239041AC50E is a solid carbide on-edge threading insert designed for cutting Stub Acme thread forms. It features a neutral hand cutting direction, a 0.5-inch inscribed circle, and an AlTiN coating applied via PVD process for extended tool life in demanding threading applications. The insert carries style designation TNMA with a cylindrical hole shape and a cutting tip width of 0.1004 inches and a thickness of 0.1890 inches. It is used in CNC lathes and turning centers by machinists and toolroom professionals performing precision internal or external threading operations where Stub Acme form accuracy is required.

This insert is suited for threading operations on Stub Acme profiles in both production and job-shop environments. The neutral hand configuration makes it appropriate for use in a range of standard toolholders without a left- or right-hand orientation constraint. The AlTiN PVD coating provides oxidation resistance and hardness retention at elevated cutting temperatures, making it well suited for interrupted cuts, harder steels, and high-speed threading passes. Size code 43 and TNMA style should be matched to compatible TOOL-FLO or equivalent on-edge threading toolholders.

Key Features

• Stub Acme thread standard for trapezoidal thread form cutting
• Solid carbide substrate with AlTiN PVD coating for heat and wear resistance
• Neutral hand cutting direction for versatile toolholder compatibility
• 0.5-inch inscribed circle with TNMA insert style designation
• Cutting tip width of 0.1004 inches and insert thickness of 0.1890 inches
• Cylindrical hole shape for secure on-edge clamping

Compatibility

Designed for use in on-edge threading toolholders accepting TNMA-style inserts with a 0.5-inch inscribed circle and size code 43. Verify toolholder specifications against TOOL-FLO insert seating requirements before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine before seating or replacing inserts. Ensure the insert pocket and clamping surfaces are clean and free of chips before seating the insert. Confirm thread form geometry against print specifications before beginning a production run.