PVD Coated 2.5mm ISO Pitch GM3225 Carbide Internal Threading Insert for CNC Stainless Steel Machining

The 16IR2.5ISO TC GM3225 is premium multilayer PVD-coated carbide internal threading insert manufactured by TC for CNC metric inner bore thread turning. Adopting standard full-profile 60° 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 designed for fixed 2.5mm pitch metric internal thread machining, it ensures precise thread contour formation, controllable chip evacuation and prolonged service life for mass-production 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.
• Fixed full 60° ISO thread profile customized exclusively for 2.5mm pitch standard metric internal threads to guarantee consistent thread dimensional precision.
• 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

• Standard 2.5mm pitch metric internal thread turning
• CNC lathe inner bore threading
• Semi-finish precision internal thread machining
• Interrupted-cut internal thread production
• Batch mass ISO metric internal thread processing

Combining TC’s proven GM3225 coated carbide substrate and dedicated 2.5mm fixed-pitch ISO thread geometry, the 16IR2.5ISO maintains steady cutting stability and uniform thread accuracy during steel and stainless steel internal threading. Its balanced durability extends tool replacement intervals and lifts overall workshop machining efficiency, making it a dependable dedicated threading insert for 2.5mm pitch metric internal thread batch production.