Original Sumitomo CNMA431 AC405K Carbide Turning Insert – Diamond 80° | Cast Iron CNMA120404

Name: Original Sumitomo CNMA431 AC405K Carbide Turning Insert - Diamond 80° | Cast Iron
Brand: Sumitomo
SKU: CNMA431 AC405K
Price: 14.33 USD
Availability: PreOrder
Rating: 4.6 (49 reviews)

Brand: Sumitomo

$14.33

★★★★⯨ 4.6 (49 reviews)

Turning Insert: CNMA431 AC405K, Carbide – AC405K, Coated Finish, 0.5079″ Long, 0.5000″ Inscribed Circle, 0.0156″ Corner Radius, 80.00 deg C – Diamond (Rhombic) 80-Deg, Series CN

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Specifications
Brand	Sumitomo
Part No. (MPN)	CNMA431
Grade	AC405K
Type	Turning Insert
Shape	Diamond 80°
Suitable Material	Cast iron
Category	Turning Inserts

Sumitomo CNMA431 AC405K – Turning Carbide Insert

The Sumitomo CNMA431 AC405K turning carbide insert excels in finish machining operations on cast iron workpieces, leveraging its tin-coated finish to minimize wear and optimize surface quality. With a diamond 80° rhombic shape and precise dimensions, including a 0.5079″ length and 0.0156″ corner radius, this insert is suited for precise and efficient turning of cast iron components. Its specialized geometry and coating behavior make it an ideal choice for achieving tight tolerances and smooth finishes in a variety of cast iron turning applications.

Industry references for Sumitomo CNMA431: AC405K is a K05 grade for finishing gray and ductile cast iron. The AC415K is a general purpose K15 turning grade for gray and ductile cast iron. The AC420K is a tough K20 grade that handles heavy … AC420K: highly stable performance and longer tool life for medium to heavy interrupted cutting (AC415K) and superior toughness (AC420K) Find Turning Insert: CNMA431 AC4010K, Carbi

Key Specifications

Brand	Sumitomo
Model	CNMA431
Grade	AC405K
Coating	tin
Insert Shape	Diamond 80°
Clearance Angle	0°
Workpiece Materials	Cast Iron
Application	Finish Machining
Geometry	Neutral
Quantity	1 PCS

Why Grade AC405K

Sumitomo’s AC405K sits between general-purpose and high-performance offerings — strong enough for production finish machining on cast iron, conservative enough to forgive the occasional spike in feed rate. tin layer keeps cutting temperatures workable.

Features & Benefits

100% Genuine Sumitomo – Original product with full quality guarantee, traceable batch.
Thermal Resistance – tin layer holds hardness above typical cutting-zone temperatures.
Edge Stability – Substrate chemistry tuned to limit micro-chipping on cast iron interruptions.
Professional CNC Tooling – Compatible with major CNC machine brands (Mazak, DMG, Haas, Doosan).
Ready Stock – In-stock for same-day dispatch from our CNC tooling warehouse.
Optimized Chip Breaker – Engineered chip geometry reduces re-cutting and machine downtime.

Recommended Applications

Finish Machining of cast iron in production CNC lines
Designed for shop conditions typical of Sumitomo tooling users worldwide
Holds dimensional tolerance over multiple indexings (insert)
Pairs well with through-coolant setups for chip evacuation

Buying Considerations

Single-pack option — useful for prototype runs or qualification before bulk commitment. Entry-tier pricing makes this a low-risk option for trialing Sumitomo tooling on a new material.

Note: Compatible tool holders sold separately. Please confirm insert-holder seat compatibility (e.g. ISO seat designation) before ordering.

Weight	0.1 kg
Dimensions	15 × 18 × 4 cm

What Buyers Say

★★★★★

100% recomendados los insertos, y el paquete está llegando muy rapido

Lizeth Villasana Rosales, Mexico via aliexpress

★★★★★

Товар доставлен, оригинальный, упаковка отличная! Всё полностью соответствует описанию.

YUrij S., Russia via Ozon

★★★★★

По сырой стали пойдёт. Большой радиус при вершине, больше нагрузка.

Vladimir G., Russia via Ozon

★★★★★

A good product and the seller offered a nice discount

Michael, American via Amazon

★★★★★

the product is like show in the picture

Jose, American via Amazon

★★★★★

дошло быстрее чем заявлено. все супер

Mariya R., Russia via Ozon

SKU: CNMA431 AC405K Categories: Diamond 80° (CNMA), Insert, Turning Inserts Brand: Sumitomo

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Original Sumitomo CNMA431 AC405K Carbide Turning Insert – Diamond 80° | Cast Iron CNMA120404

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