Carmex 20402363 Laydown Threading Insert 8 Tpi Stub Acme P30

Product Description

The CARMEX 20402363 is a laydown threading insert designed for cutting internal Stub Acme threads on a lathe or CNC turning center. Built from solid carbide with a P30 manufacturer grade and C5 material grade, it delivers consistent thread form geometry on a wide range of machinable materials. The insert operates at 8 threads per inch, has a 3/8 inch inscribed circle, and measures 0.146 inches thick. The bright, uncoated finish suits applications where coating buildup could affect thread tolerance. Right-hand cutting orientation means it is set up for standard feed direction on internal threading passes.

This insert is intended for internal Stub Acme threading operations where a right-hand thread form is required. Stub Acme profiles are common in power-transmission and motion-control applications such as lead screws, jack screws, and feed mechanisms where a full Acme depth is not practical. This insert is suited for use in machine shops, manufacturing facilities, and maintenance environments where precision threading on metal workpieces is performed by machinists and CNC operators.

Key Features

• Solid carbide construction with P30 grade for rigidity and wear resistance in threading applications
• Stub Acme internal thread form at 8 TPI for power-transmission thread cutting
• 3/8 inch inscribed circle fits standard 16IR insert toolholders
• 0.146 inch insert thickness provides stable seating in the pocket
• Bright, uncoated finish maintains dimensional accuracy where coated inserts may introduce profile variation
• Right-hand cutting orientation for standard internal threading pass direction

Compatibility

Designed for use in 16IR-style laydown threading insert toolholders that accept a 3/8 inch inscribed circle insert for internal threading operations.

Installation Notes

Indexable threading inserts are installed and replaced by machinists during machine setup or when insert wear causes thread form deviation. Power down or engage the machine E-stop before indexing or replacing inserts. Use the appropriate torx or hex key to seat the insert firmly and evenly in the toolholder pocket, and verify insert orientation matches the required thread hand before resuming cuts. Minimum order quantity for this insert is 10 pieces.