null AC8025P AC8025P Wendeplatten - Sumitomo

Take advantage of the combination of reliable CVD ABSOTECH Platinum coating, a GU universal chipbreaker, and an 80° C-rhombus geometry for consistent performance in general and medium steel turning; order directly via Metav Werkzeuge or consult the technical team for application-specific advice.

Sumitomo CNMG120408N-GU AC8025P indexable turning insert — 80° C-rhombus, CVD-coated

The Sumitomo CNMG120408N-GU AC8025P is a negative 80° indexable insert designed for general and medium steel turning, providing stable cutting in continuous to lightly interrupted conditions.

• C-rhombus 80° negative geometry
• CVD ABSOTECH Platinum coating AC8025P
• GU universal chipbreaker, double-sided
• Four usable cutting edges per insert

Consistent performance for general and medium steel turning

The insert is engineered around an 80° C-rhombus geometry and a GU universal chipbreaker, which together deliver stable engagement and reliable chip control in typical steel turning tasks. The CVD ABSOTECH Platinum coating with a hardness of 90.1 HRA and an approx. 12 µm layer thickness reduces adhesion and build-up at the cutting edge, extending productive cutting intervals. This combination is particularly beneficial where repeatable surface quality and predictable tool life are priorities.

Predictable cutting window and machining recommendations

Recommended cutting windows are documented to support process planning: for workpieces up to ~180 HB, a depth of cut (ap) of 1.0–4.0 mm, feed 0.20–0.50 mm/rev, and cutting speed Vc 200–320 m/min (optimum ≈ 260 m/min) form a validated starting point. For harder materials above ~180 HB, the same ap and feed ranges apply but with reduced speeds (Vc 130–230 m/min, optimum ≈ 165 m/min). These values enable a straightforward selection of parameters and allow setup engineers to balance productivity and tool life efficiently.

Robust edge security and operational versatility

The double-sided design provides four usable cutting edges and a 0.8 mm corner radius, offering a broad window for finishing and semi-finishing passes. The insert’s bending strength of 2.3 GPa supports reliable performance under varying cutting forces. While optimised for general steel work, the insert is not the primary choice for heavy interrupted cuts, maximum high-speed continuous cuts, hardened steel or stainless steel — its strengths lie in a wide, economical application range with low adhesion and good resistance to edge chipping.

Discuss machining parameter optimisation and order Sumitomo CNMG120408N-GU AC8025P inserts through Metav Werkzeuge; technical consultants are available at info@metav-werkzeuge.com or +49 2822 7131930 to tailor recommendations to specific machines and workpiece materials

Technical data

• Article number: 19P7335
• SKU: 230846-Sumitomo
• Manufacturer SKU: CNMG120408N-GU AC8025P
• Product: Sumitomo CNMG120408N-GU AC8025P indexable insert
• Origin: Japan

Numbers / Core technical data

• Hardness: 90.1 HRA
• Layer thickness: approx. 12 µm
• Bending strength: 2.3 GPa
• Plate thickness: 4.76 mm
• Cutting edge length: 12.9 mm
• Inner hole diameter: 12.7 mm
• Corner radius: 0.8 mm
• Number of usable edges: 4
• Pack quantity: 10 pieces
• Included angle / tip angle: 80°
• Tolerance class: M
• Recommended windows (≤ ~180 HB): ap 1.0–4.0 mm; f 0.20–0.50 mm/rev; Vc 200–320 m/min (optimum ≈ 260 m/min)
• Recommended windows (> ~180 HB): ap 1.0–4.0 mm; f 0.20–0.50 mm/rev; Vc 130–230 m/min (optimum ≈ 165 m/min)

Designs / Special features

• C-rhombus 80° negative geometry
• GU universal chipbreaker, general/middle machining, double-sided
• Carbide, CVD-coated (ABSOTECH Platinum)
• Cylindrical through-hole
• Neutral cutting direction
• Four usable edges per insert
• Current Sumitomo first recommendation for general steel turning
• Not optimised for highest-speed continuous cuts or heavily interrupted/hardened steel

FAQ

What materials is this insert intended to machine?
The Sumitomo CNMG120408N-GU AC8025P indexable insert is intended primarily for general and medium steel turning and performs best within the documented cutting windows for mild to medium-hard steels.

What does the GU chipbreaker deliver in practice?
The GU universal chipbreaker on this insert provides controlled chip formation for a wide range of cutting depths and feeds, supporting predictable surface finish and reduced edge build-up during standard turning tasks.

How many usable edges are available per insert and what is the corner radius?
Each double-sided insert supplies four usable cutting edges and a corner radius of 0.8 mm, allowing for multiple indexings before replacement.

Are there any application limits for this grade?
The AC8025P grade is not the primary choice for the heaviest interruptions, extreme high-speed continuous cuts or hard and stainless steels; it is optimised for a broad, economical range of steel turning operations.

What is the significance of the CVD ABSOTECH Platinum coating?
The CVD ABSOTECH Platinum coating enhances surface smoothness and reduces adhesion at the cutting edge, lowering the risk of built-up edge and improving edge security under typical turning conditions.

Manufacturer: Sumitomo; Origin: Japan