PVD Coated CCMT120408GP GM1125 Carbide Turning Insert with GP Chipbreaker and R0.8 Corner Radius for CNC Turning

The CCMT120408GP GM1125 is premium multilayer PVD-coated carbide indexable turning insert manufactured by TC for CNC outer diameter and inner bore turning. Featuring 80° rhombic CCMT structure, customized GP chipbreaker geometry and TC exclusive fine-grain GM1125 carbide substrate, the insert owns outstanding wear resistance and moderate toughness to sustain stable cutting performance in continuous and light-interrupted roughing & semi-finish turning processes.

Optimized GP chip groove design realizes stable chip curling and smooth chip evacuation, guaranteeing precise dimensional tolerance and prolonged service life for mass component production on standard CNC lathes and automatic turning machines.

• GM1125 fine-grain tungsten carbide base with multilayer PVD coating balances abrasion resistance and thermal stability, well suited for conventional cutting of carbon steel, alloy steel and general structural metal.
• Specially engineered GP chipbreaker delivers excellent chip control to prevent long chip winding and workpiece surface scratching.
• Standard CCMT1204 insert dimension with reasonable clearance angle, easy locking and perfect fit with matched CCMT series tool holders.
• Precision-ground cutting edge ensures superior machined surface finish and minimizes post-processing burrs.
• Strengthened cutting edge suppresses built-up edge formation during long-term continuous production and extends insert service lifespan effectively.

• Carbon steel
• Alloy steel
• Pre-hardened structural steel
• Cast steel
• Low-strength austenitic stainless steel

• General outer diameter rough & semi-finish turning
• CNC lathe inner hole boring machining
• Light interrupted contour turning
• Mass batch mechanical part turning
• Universal conventional lathe machining

Combining TC’s mature GM1125 coated carbide substrate and practical GP chipbreaker design, the CCMT120408GP maintains steady cutting stability and consistent dimensional accuracy during steel component turning. Its balanced wear performance reduces tool replacement frequency and improves overall workshop productivity, acting as a cost-effective general-purpose turning insert for mass semi-finish and rough machining.