Iscar 3409672 Threading Insert 10 Tpi Internal Un IC908

Product Description

The ISCAR 3409672 is a solid carbide laydown threading insert designed for internal thread cutting in UN-standard threads at 10 threads per inch. Manufactured to the IR series in style 11IR with an IC908 grade coated carbide substrate, this insert delivers consistent thread form on right-hand internal applications. The 60-degree included angle matches the UN thread profile precisely, while the Z chipbreaker geometry helps manage chip flow during threading passes. With a 1/4-inch inscribed circle and a corner radius of 0.0071 inches, this insert suits production and maintenance threading operations performed by machinists and tool and die professionals.

The ISCAR 3409672 is suited for internal threading operations on CNC lathes and manual turning centers where UN-standard thread profiles are required. Its right-hand orientation and 10 TPI specification make it a direct fit for threading bores on components in manufacturing, repair, and job shop environments. The IC908 coated grade is appropriate for a broad range of ferrous workpiece materials at moderate cutting parameters.

Key Features

• IR series 11IR insert style with 60-degree included angle for UN thread profile accuracy
• IC908 coated solid carbide grade for wear resistance across ferrous materials
• Z chipbreaker geometry for controlled chip evacuation during internal threading
• 10 threads per inch UN internal thread standard, right-hand cut
• 1/4-inch (0.2500-inch) inscribed circle with 0.0071-inch corner radius
• Laydown seating style for rigid, repeatable insert positioning in compatible toolholders

Compatibility

Designed as an OEM-style replacement threading insert for IR-series internal threading toolholders accepting 11IR-style laydown inserts with UN thread form geometry.

Installation Notes

Installation is performed by qualified machinists following standard insert indexing procedures. Power down and lock out the machine before seating or replacing the insert. Use the appropriate torx or hex key to secure the clamping screw to the toolholder manufacturer's recommended torque specification. Inspect the insert pocket for chips or debris before seating to ensure proper contact and thread accuracy.