Carmex 22UIR4STACMEP30 Threading Insert 4 Tpi Stub Acme

Product Description

The CARMEX 22UIR4STACMEP30 is a solid carbide laydown threading insert designed for internal Stub Acme thread cutting applications. Built to the 22IR insert style, this right-hand insert operates at 4 threads per inch (TPI) and features a 0.5-inch inscribed circle with a thickness of 0.187 inches. The uncoated P30 grade carbide construction suits a range of threading operations where precise Stub Acme thread profiles are required. Machinists and tooling specialists install this insert into compatible laydown-style threading toolholders for CNC or manual lathe work.

This insert is suited for internal threading of Stub Acme forms, commonly found in power transmission components, lead screws, and jack mechanisms. The right-hand thread orientation fits standard internal boring and threading bar setups. At 4 TPI, it handles coarser-pitch Stub Acme threads typical in heavy-duty mechanical assemblies. The solid carbide construction provides rigidity and edge stability during intermittent or continuous threading cuts in ferrous and non-ferrous materials within the C5 material grade range.

Key Features

• 22IR insert style for laydown threading toolholders
• Internal Stub Acme thread form at 4 TPI
• Solid carbide construction, uncoated, P30 manufacturer grade
• 0.5-inch inscribed circle for secure seating in compatible holders
• 0.187 inches thick for dimensional consistency across toolholder systems
• Right-hand cutting orientation

Compatibility

Designed as an OEM-style replacement or direct-use threading insert for 22IR-style laydown threading toolholders configured for internal Stub Acme thread profiles.

Installation Notes

Installation is performed by qualified machinists on CNC or manual lathes. Power down and de-energize the machine before seating or replacing any insert. Use the correct torque wrench and clamping screw specified by the toolholder manufacturer to secure the insert. Inspect the insert pocket for chips or wear before installation to ensure proper seating and thread-form accuracy.