Iscar 5921209 Laydown Threading Insert 48-16 Tpi

Product Description

The ISCAR 5921209 is a solid carbide laydown threading insert designed for internal partial profile 60-degree thread cutting applications. Manufactured under the ISCARTHREAD series, this insert carries the IC908 grade with a PVD-applied TiAlN coating for extended tool life in demanding threading operations. It features a 3/16 inch (0.1875 inch decimal) inscribed circle, a thickness of 0.079 inches, and covers a threads-per-inch range of 48 to 16 TPI, equivalent to a pitch range of 0.50 to 1.50 mm. The right-hand cutting geometry with an M chipbreaker makes it well suited for precision internal threading on CNC lathes and turning centers. Installation and use require a compatible 08IR-style toolholder.

This insert is intended for internal threading operations on a broad range of workpiece materials. The IC908 grade and universal primary workpiece material classification make it applicable across material groups including steel, stainless steel, cast iron, non-ferrous alloys, high-temperature alloys, and other common machining materials designated by ISO codes H, K, M, N, P, and S. It is typically used by machinists and tooling specialists in production turning environments requiring consistent thread form accuracy across medium to fine pitch ranges.

Key Features

• IC908 grade solid carbide with PVD TiAlN coating for wear resistance and thermal stability
• Right-hand internal partial profile 60-degree thread form covering 48-16 TPI (0.50-1.50 mm pitch)
• 3/16 inch inscribed circle with 0.079 inch thickness for compact 08IR-style toolholder compatibility
• M chipbreaker geometry for controlled chip evacuation in internal threading
• Universal material grade rating across ISO material groups H, K, M, N, P, and S
• Compliant with ISO 13399 cutting tool data representation standards

Compatibility

Designed for use with 08IR-style internal threading toolholders accepting a 3/16 inch inscribed circle laydown insert. Refer to ISCARTHREAD series toolholder documentation to confirm proper seat and clamping compatibility before use.

Installation Notes

Insert replacement and seating should be performed by a qualified machinist or tooling technician with the machine fully powered down and the spindle locked. Use the correct torque wrench and insert screw specified by the toolholder manufacturer to avoid seat damage or insert fracture. Do not exceed the recommended depth of cut or feed rate for the IC908 grade and workpiece material combination. Verify thread form accuracy with a thread gauge after initial setup before committing to full production runs.