Carmex 16IR16ABUTP30 Laydown Threading Insert 16 Tpi

Product Description

The CARMEX 16IR16ABUTP30 is a solid carbide laydown threading insert designed for cutting internal American Buttress threads. Running at 16 threads per inch (TPI) with a 3/8-inch inscribed circle and a thickness of 0.146 inches, this uncoated P30 grade insert delivers consistent thread form on right-hand internal applications. The zero-degree relief angle and solid carbide construction make it well-suited for threading operations where dimensional accuracy and edge stability are priorities. Machinists and toolroom operators will recognize this as a direct-fit insert for compatible laydown threading toolholders used on CNC lathes and manual turning centers.

This insert is intended for internal American Buttress thread profiles, a thread standard commonly found in high-load applications such as hydraulic cylinders, jack screws, and heavy-duty pipe couplings. The right-hand cutting geometry suits standard lathe setups without special toolholder orientation. At 16 TPI, it covers a range of medium-pitch internal threading work in ferrous and non-ferrous materials within the P30 material grade range, including general-purpose steels and cast iron.

Key Features

• Solid carbide construction at P30 grade (C5 material grade) for wear resistance on steel and cast iron
• Uncoated finish - suitable for applications where coatings may cause dimensional interference or where re-grinding is anticipated
• 16 TPI American Buttress internal thread profile for high-load threaded connections
• Right-hand cutting orientation for standard lathe threading setups
• 3/8-inch inscribed circle with 0.146-inch thickness - compatible with standard 16IR laydown toolholder seats
• Zero-degree relief angle for maximum edge support and insert stability

Compatibility

Designed for use in laydown threading toolholders accepting the 16IR insert style. Verify toolholder seat geometry and pocket dimensions before installation to confirm fit.

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer's torque and seating specifications. Ensure the machine spindle is fully stopped and locked out before changing inserts. Seat the insert fully against the pocket locating surfaces before tightening the clamping screw to prevent movement during the threading pass. Inspect the insert edge under magnification before use to confirm no chipping occurred during handling.