CCMT09T308N-SU AC820P AC820P Wendeplatten - Sumitomo

Take advantage of the combination of precise CVD AC820P coating performance, a positive 80° C‑rhombus geometry and a 0.8 mm corner radius for consistent finishing results; order the insert directly via Metav Werkzeuge or request application advice from the consultants.

Sumitomo CCMT09T308N-SU AC820P – Positive 80° turning insert for finishing steel

A Sumitomo CCMT09T308N-SU AC820P turning insert engineered for finishing and light external and internal turning of steel in continuous to lightly interrupted cuts

• CVD-coated AC820P for balanced wear resistance
• Positive 80° C‑rhombus geometry for fine finishing
• SU chipbreaker for light, one-sided chips
• Two usable cutting edges; 0.8 mm corner radius

Stable surface finish through positive geometry

The positive C‑rhombus 80° form paired with a small 0.8 mm corner radius promotes a consistently fine surface on turned components. The insert’s positive rake and neutral cutting direction reduce cutting forces, which benefits smaller lathes and lighter set-ups by lowering vibration and improving repeatability. This geometry is particularly suited to finishing passes where surface integrity and dimensional stability are priorities.

Balanced wear and fracture resistance for steady productivity

Coated with a CVD Super‑FF layer (Al₂O₃/TiCN) of approximately 14 µm and a substrate hardness of 90.1 HRA, the grade delivers an even compromise between wear resistance and toughness. The measured bending strength of 2.2 GPa supports resistance against fracture in continuous to lightly interrupted cuts, making the insert a dependable choice for production runs requiring long tool life and fewer tool changes.

Controlled chip formation and predictable cutting window

The single‑sided SU chipbreaker and a slightly positive chip angle (approx. 8°) generate short, manageable chips for finishing operations. Recommended cutting parameters span ap 0.5–2.5 mm and feed f 0.07–0.30 mm/rev (optimum 0.20 mm/rev), with cutting speeds Vc 190–310 m/min (optimum 250 m/min) for steel applications. These ranges help to set up processes quickly and achieve repeatable component quality.

Practical design for everyday turning tasks

A cylindrical hole with a single countersink and a plate thickness of 3.97 mm ensure stable clamping and reliable seat location in standard toolholders. Two usable cutting edges extend the economical life of each indexable plate, while the neutral feed direction and positive geometry keep cutting forces moderate. The insert is supplied in practical packaging units of 10 pieces, facilitating workshop inventory management.

For application advice or stock information on Sumitomo turning inserts, contact Metav Werkzeuge by e‑mail at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: 207108
• Manufacturer article number: 207108
• SKU: 207108-Sumitomo
• Product name: Sumitomo CCMT09T308N-SU AC820P Wendeschneidplatte
• Product type: Indexable insert for turning
• Brand: Sumitomo
• Origin: Japan

Facts

• Substrate hardness: 90.1 HRA
• Layer thickness: approx. 14 µm
• Bending strength: 2.2 GPa
• Plate thickness: 3.97 mm
• Cutting edge length: 9.7 mm
• Inner circle diameter: 9.525 mm
• Cutting angle / tip angle: 80°
• Clearance angle: 7°
• Corner radius: 0.8 mm
• Usable cutting edges: 2
• Recommended cutting speed Vc: 190–310 m/min (optimum 250 m/min)
• Feed range f: 0.07–0.30 mm/rev (optimum 0.20 mm/rev)
• ap range: 0.5–2.5 mm
• Pack unit: 10 pieces
• Tolerance class: M

Special features

• Material: Cemented carbide, CVD-coated (Super‑FF, Al₂O₃/TiCN)
• Grade: AC820P (universal CVD sort for steel)
• Chipbreaker: SU – light, one-sided chip control
• Plate form: C‑Rhombus 80° (positive)
• Plate size: 09T3 (CCMT09T308N‑SU)
• Hole style: Cylindrical hole with single countersink
• Cutting direction: Neutral
• Application: Finishing to light external and internal turning of steel; continuous to slightly interrupted cuts
• Limitations: Not intended for heavy interrupted cuts, aggressive roughing or primarily stainless steel applications
• Suitability: Two usable cutting edges; positive rake angle approx. 8°

FAQ

What applications suit this turning insert best?
The insert is designed for finishing and light external and internal turning of steel, performing well in continuous to slightly interrupted cuts; it is specified as a Sumitomo CCMT09T308N‑SU AC820P turning insert.

Which cutting speeds and feeds are recommended?
For the AC820P grade, use Vc 190–310 m/min (optimum 250 m/min) with feeds of 0.07–0.30 mm/rev (optimum 0.20 mm/rev) and ap between 0.5–2.5 mm for typical steel finishing tasks.

What benefits does the CVD AC820P coating provide?
The CVD AC820P coating (Al₂O₃/TiCN) offers a balanced combination of wear resistance and toughness, assisting long tool life and stable performance in finishing operations on steel.

Can the insert be used for interrupted cuts?
Yes, the insert tolerates light interruptions in cutting; however, it is not intended for heavy interrupted cuts or aggressive roughing where a more fracture‑resistant grade would be required.

How many effective edges does each plate provide?
Each plate offers two usable cutting edges, which supports economical indexation and reduces tooling costs in serial production.

Manufacturer: Sumitomo Electric Hardmetal Corp.; 1‑1‑1 Koyakita, Itami, Hyogo 664‑0016; in Itami Works of Sumitomo Electric Industries, Ltd.