10pc Kyocera CNMG120408PMG CA125P – Turning Insert (Medium-Roughing)

Kyocera CNMG120408PMG CA125P – Turning Insert (10 pcs Medium-Roughing, PMG Chipbreaker)

The Kyocera CNMG120408PMG CA125P is a negative-type turning insert designed for medium to roughing operations in steel machining. It features the advanced CA125P CVD-coated carbide grade, which provides excellent wear resistance and fracture toughness, making it ideal for continuous to heavy interrupted cutting conditions. Combined with the PMG chipbreaker, it delivers stable chip control, reduced cutting forces, and significantly extended tool life – up to 2× longer than competitor grades in comparative tests.

Key Features & Benefits

• CA125P Grade: Optimized for continuous to heavy interrupted steel machining with high wear resistance.
• PMG Chipbreaker: Step-breaker structure suppresses chip entanglement at large depths of cut, while controlling chips at small depths.
• Extended Tool Life: Demonstrated up to 2× longer life than competitor F under heavy interrupted machining conditions.
• Stable Performance: Maintains cutting edge reliability and chip shape consistency across a wide range of machining areas.

Applications

• Medium to roughing operations in steels such as SCr420, SCM435, and similar alloys.
• Continuous and heavy interrupted cutting (e.g., automotive shafts, gears, bolts, and general steel components).
• Effective under wet machining with cutting speeds in the 190–300 m/min range, ap up to 5.0 mm, and feeds 0.1–0.5 mm/rev.

Technical Specifications

• Designation / Order Code: CNMG120408PMG
• Insert Type: Negative, 80° diamond
• Inscribed Circle (IC): 12.70 mm
• Thickness: 4.76 mm
• Hole Diameter: 5.16 mm
• Corner Radius (RE): 0.8 mm
• Grade: CA125P (CVD coated carbide)
• Chipbreaker: PMG – Medium-Roughing
• Pack Size: 10 pieces