Original Sumitomo AC4125K CNMA643 Carbide Turning Insert – Parallelogram 85° | Cast Iron CNMA643 AC4125K CNMA190612

Name: Original Sumitomo AC4125K CNMA643 Carbide Turning Insert - Parallelogram 85° | Cast Iron CNMA643 AC4125K
Brand: Sumitomo
SKU: CNMA643 AC4125K
Price: 34.49 USD
Availability: PreOrder
Rating: 4.7 (8 reviews)

Brand: Sumitomo

$34.49

★★★★⯨ 4.7 (8 reviews)

Turning Insert: CNMA643 AC4125K, Carbide – AC4125K, Absotech Finish, Neutral, 19.30 mm Long, 19.05 mm Inscribed Circle, 1.20 mm Corner Radius, 80.00 deg C – Diamond (Rhombic) 80-Deg, Series AC4125K

ⓘ Prices move with raw-material (tungsten / steel) market rates. Please confirm the current price with us before placing your order — thank you.

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Specifications
Brand	Sumitomo
Part No. (MPN)	CNMA643
Grade	AC4125K
Type	Turning Insert
Shape	Parallelogram 85°
Suitable Material	Cast iron
Category	Turning Inserts

Sumitomo AC4125K CNMA643 – Turning Carbide Insert

Industry references for Sumitomo AC4125K: Sumitomo Turning Insert: CNMA643 AC4125K, Carbide Absotech Finish, Neutral, 19.30 mm Long, 19.05 mm Inscribed Circle, 1.20 mm Corner Radius, 80.00 deg Diamond 80°, Series AC4125K Features AC4010K / AC4015K Technologies for high-adhesion, crystal orientation control and residual stress control realise stable tool life for various types of cast iron, from grey cast iron (GJL) to

Key Specifications

Brand	Sumitomo
Model	AC4125K
Grade	CNMA643
Coating	Diamond
Insert Shape	Parallelogram 85°
Clearance Angle	7°
IC (Inscribed Circle)	4.1mm
Thickness	2.5mm
Workpiece Materials	Cast Iron
Application	Rough Machining
Geometry	Neutral
Quantity	1 PCS

Why Grade CNMA643

Sumitomo’s CNMA643 sits between general-purpose and high-performance offerings — strong enough for production rough machining on cast iron, conservative enough to forgive the occasional spike in feed rate. Diamond layer keeps cutting temperatures workable.

Features & Benefits

100% Genuine Sumitomo – Original product with full quality guarantee, traceable batch.
Diamond Coating – Superior wear resistance and extended tool life under continuous load.
QC Inspected – Each batch sampled for edge profile, dimensional accuracy, and coating adhesion.
Bulk Pricing Available – Discount tiers for production-volume orders; contact sales.
Predictable Wear – Even flank wear pattern simplifies tool-life prediction and scheduling.
Optimized Chip Breaker – Engineered chip geometry reduces re-cutting and machine downtime.

Recommended Applications

Rough Machining of cast iron in production CNC lines
Useful for batch production where tool-life predictability matters
Suitable for both wet and dry machining conditions
Effective in interrupted and continuous cutting passes

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.

Tip: Match this insert to a holder whose seat matches the ISO designation. If you’re unsure, send us the holder model and we’ll confirm compatibility before shipping.

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: CNMA643 AC4125K Categories: Diamond 80° (CNMA), Insert, Turning Inserts Brand: Sumitomo

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Original Sumitomo AC4125K CNMA643 Carbide Turning Insert – Parallelogram 85° | Cast Iron CNMA643 AC4125K CNMA190612

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