The 16IRAG60 TC GM3225 is premium multilayer PVD-coated carbide universal internal threading insert manufactured by TC for versatile CNC metric inner bore thread turning. Adopting universal partial-profile 60° AG60 ISO thread geometry and TC exclusive fine-grain GM3225 carbide grade, this insert features excellent toughness, reliable wear and chipping resistance to retain stable cutting performance in continuous and interrupted internal threading operations.

Specially engineered for multi-pitch general-purpose 60° metric internal thread machining, it ensures precise thread contour formation, controllable chip evacuation and prolonged service life for diversified batch internal threading on general CNC lathes and automatic turning equipment.

• GM3225 fine-grain carbide substrate with multilayer PVD coating balances high toughness and abrasion resistance, well suited for high-temperature cutting of stainless steel and alloyed metal materials.
• Universal partial 60° AG60 ISO thread profile compatible with multiple common metric thread pitches to reduce spare insert inventory cost.
• Standard 16IR internal insert structure with optimized clearance, easy clamping and stable installation on matching 16IR-series internal threading tool holders.
• Precision-ground cutting edge delivers superior thread surface finish and effectively lowers burr generation after machining.
• Reinforced cutting edge inhibits built-up edge accumulation during long-cycle continuous production and extends overall insert service lifespan.

• Carbon steel
• Alloy steel
• Austenitic stainless steel
• Heat-resistant superalloy
• Pre-hardened structural steel

• Universal multi-pitch 60° ISO internal thread turning
• CNC lathe inner bore threading
• Semi-finish precision internal thread machining
• Interrupted-cut internal thread production
• Mixed-spec diversified batch metric thread processing

Combining TC’s proven GM3225 coated carbide substrate and versatile AG60 universal 60° thread geometry, the 16IRAG60 maintains steady cutting stability and uniform thread accuracy during steel and stainless steel internal threading. Its wide multi-pitch compatibility cuts down tool stocking quantity and shortens production setup time, lifting overall workshop machining efficiency and serving as an economical universal threading insert for mixed-spec internal thread batch production.