Seco 00074904 Threading Insert 4 Tpi Stub Acme Solid Carbide

Product Description

The SECO 00074904 is a laydown threading insert designed for external Stub Acme thread cutting at 4 threads per inch. Built from solid carbide and coated with a TiAlN/TiN finish via PVD process, this insert delivers reliable wear resistance and edge stability under demanding threading conditions. It carries a 29-degree included angle and an inscribed circle of 0.6252 inches (15.88 mm), with a thickness of 0.2421 inches (6.15 mm). Rated under SECO's CP500 manufacturer grade and part of the Snap Tap series, this insert is suited for right-hand external threading operations on CNC lathes and threading centers. Installation is typically performed by machinists and toolroom technicians working with threaded fastener profiles, lead screws, and power transmission components.

The 00074904 is intended for external Stub Acme threading applications in production and job shop environments. Its universal primary workpiece material rating makes it usable across cast iron, steel, stainless, aluminum, and high-temp alloys. Typical applications include threading lead screws, acme rods, and mechanical actuator components where a 29-degree Stub Acme thread form is specified. This insert fits toolholders compatible with the 27ER insert style. It is sold individually per package, with a minimum order quantity of 10 units.

Key Features

• Solid carbide substrate for high hardness and thermal stability
• TiAlN/TiN PVD coating for improved wear life and surface finish
• 4 TPI Stub Acme external thread form with 29-degree included angle
• CP500 grade rated for universal workpiece materials including steel, cast iron, aluminum, and superalloys
• Right-hand cutting geometry for standard external threading setups
• ISO-compliant insert standard in the Snap Tap series

Compatibility

Designed for use with 27ER-style insert toolholders for external threading. Compatible with workpiece material codes K, M, N, P, and S per ISO classification, covering cast iron, stainless steel, non-ferrous metals, steel, and heat-resistant superalloys.

Installation Notes

This insert is installed and changed by machinists or toolroom technicians on CNC or manual threading lathes. Ensure the machine is fully stopped and the spindle is locked before seating or replacing the insert. Use the correct torx or clamping key specified by the toolholder manufacturer when securing the insert to avoid fracture. Verify thread form, TPI, and hand orientation against the job drawing before running the first pass.