DCMT11T304N-SU AC8035P AC8035P Wendeplatten - Sumitomo

Benefit from the combination of a positive 55° D‑rhombus geometry, a proven SU chipbreaker and the CVD‑coated AC8035P grade for secure edges and stable performance in light, interrupted steel turning; order the insert directly via Metav Werkzeuge or consult our specialists for application support.

DCMT11T304N-SU AC8035P turning indexable insert — positive 55° geometry, CVD-coated (Sumitomo)

The Sumitomo DCMT11T304N-SU AC8035P is a positive, D‑rhombus 55° indexable insert designed for light, interrupted steel turning with an SU chipbreaker and a 0.4 mm corner radius

• CVD-coated grade AC8035P for edge security
• Positive D‑rhombus 55° geometry for fine turning
• SU chipbreaker for light interrupted steel cuts
• Two usable cutting edges; 0.4 mm corner radius

Reliable chip control and secure edges for interrupted cuts

The positive D‑rhombus 55° profile combined with the SU chipbreaker creates controlled chip breakage and low cutting forces, making the insert particularly suitable for light, interrupted steel machining and components with variable surface conditions such as forged skins. The small 0.4 mm corner radius reduces impact at entry and exit, lowering the risk of chipping; the dual usable cutting edges extend tool life per index, improving uptime and reducing handling frequency.

Coating and substrate engineered for reduced crack propagation

The insert is produced from CVD‑coated carbide in the AC8035P grade with a surface treatment (ABSOTECH) that reduces stress concentration. With a hardness of 89.4 HRA and a quoted transverse fracture strength of 2.6 GPa, the combination provides high edge and break resistance under interrupted loads. The approximately 9 µm coating thickness optimises edge protection; note that while the grade excels in interrupted and variable conditions, continuous, quiet high‑speed finishing is not its primary strength.

Process windows and starting recommendations for steady results

For stable cutting start in the suggested geometry range: radial depth of cut ap 0.5–2.5 mm and feed f 0.07–0.30 mm/rev. Recommended cutting speeds are application dependent: Vc ≈ 140–220 m/min for mild steels and ≈ 90–160 m/min for higher alloyed or carburised steels, beginning at the lower end and increasing as process confidence grows. These ranges help achieve repeatable component quality while protecting the insert from overload during entry and broken surfaces.

Dimensions, clamping and handling for easy integration

Key dimensions and handling details support simple machine integration: plate thickness 3.97 mm, usable cutting edge length 11.6 mm, inner hole diameter 9.525 mm with a cylindrical hole and one‑sided countersink, and two usable cutting edges per insert. The insert is supplied in a pack unit of 10 pieces and is produced in Japan; tolerance class M ensures consistent fit in standard turning toolholders. The neutral cutting direction and positive clearance angle of 7° combine for forgiving tool behaviour under variable conditions.

Contact Metav Werkzeuge today for tailored recommendations on Sumitomo AC8035P inserts and to discuss suitable cutting parameters or sample packs — eMail: info@metav-werkzeuge.com, Tel: +49 2822 7131930

Technical Data

• Article number: 245078-Sumitomo
• Manufacturer SKU: DCMT11T304N-SU AC8035P
• Product type: turning indexable insert
• Origin: Japan
• Packaging unit: 10 pieces

Data

• Hardness: 89.4 HRA
• Plate thickness: 3.97 mm
• Cutting edge length: 11.6 mm
• Corner radius: 0.4 mm
• Included angle / nose angle: 55°
• Relief angle / free angle: 7°
• Inner hole diameter: 9.525 mm
• Number of usable cutting edges: 2
• Tolerance class: M

Special features

• Material: carbide, CVD‑coated (AC8035P)
• Chipbreaker geometry: SU — one‑sided, positive rake ≈ 8°
• Geometry: D‑rhombus 55°, positive insert
• Hole style: cylindrical hole with one‑sided countersink
• Application: light, interrupted steel turning; suitable for forged surfaces and variable conditions
• Coating details: ABSOTECH CVD, layer thickness ≈ 9 µm; reduced surface stresses
• Mechanical: high edge and fracture resistance; bending strength 2.6 GPa
• Limits: not optimised for heavy roughing or continuous high‑speed finishing

FAQ

What material is this insert best suited for?
The DCMT11T304N-SU AC8035P insert is optimised for steel machining, particularly light, interrupted cuts and components with forged surfaces; its AC8035P CVD grade gives improved edge security in such conditions.

Which chipbreaker is fitted and what does it achieve?
The insert features an SU chipbreaker, a one‑sided positive design that provides controlled chip formation and reduced cutting forces during interrupted and variable‑condition turning.

What are the recommended cutting parameters to start with?
Begin with ap 0.5–2.5 mm and feed 0.07–0.30 mm/rev; suggested cutting speeds are ≈ 140–220 m/min for mild steels and ≈ 90–160 m/min for higher alloyed steels, adjusting upward as stability permits.

How many times can the insert be indexed?
The insert has two usable cutting edges, enabling one index change; the positive geometry and robust coating help prolong useful life under interrupted loads.

Are there limitations to using this grade?
Yes — the AC8035P grade and 55° DCMT geometry are not intended for heavy roughing or for continuous, quiet high‑speed finishing where different grades or geometries perform better.

Manufacturer/Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com