Iscar 5993178 Threading Insert 60 Deg 3/8 IC908 Carbide

Product Description

The ISCAR 5993178 is a solid carbide laydown threading insert designed for external thread-cutting operations. It carries an IC908 manufacturer grade with a TiAlN PVD coating, offering wear resistance and thermal stability across a range of workpiece materials. The insert produces a 60-degree partial profile external thread covering 14 to 8 TPI, with a pitch range of 1.75 to 3.00 mm. The inscribed circle measures 3/8 inches (0.375 inches) and the insert thickness is 0.143 inches. Right-hand orientation is standard. This insert is installed by machinists and CNC tool-room technicians running threading cycles on lathes or turning centers.

The 5993178 is suited for external threading applications across a broad range of workpiece materials, including steels, stainless steels, cast iron, non-ferrous alloys, high-temperature alloys, and hardened materials, consistent with material grade designations C1, C2, C6, and C7 and ISO workpiece codes H, K, M, N, P, and S. It is part of the ISCARTHREAD series and is intended for production threading on CNC turning equipment where a reliable, repeatable 60-degree thread form is required. Typical applications include bolt, stud, and shaft threading in both job-shop and production environments.

Key Features

• IC908 grade solid carbide with TiAlN PVD coating for extended tool life
• 60-degree external partial profile thread form, right-hand cut
• Covers 14 to 8 TPI range (1.75 to 3.00 mm pitch)
• 3/8-inch inscribed circle for use in standard 16ER-style toolholders
• Compatible with universal workpiece material codes H, K, M, N, P, and S
• Conforms to ISO 13399 insert identification standards

Compatibility

Designed as an OEM-style replacement insert for 16ER-series laydown threading toolholders accepting a 3/8-inch inscribed circle carbide insert with a 60-degree thread form profile.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Power down and lock out the machine spindle before seating or replacing the insert. Ensure the toolholder pocket is clean and free of chips before clamping. Verify insert orientation and thread hand against the programmed toolpath before resuming cutting operations.