DESCRIPTION

Product Overview

The DNMG150612-CKM CD3220 is a high-performance, negative 55° diamond turning insert engineered engineered specifically for high-efficiency roughing and medium turning of ISO K-Class materials (Grey Cast Iron, Ductile/Nodular Iron, and Compacted Graphite Iron). Featuring a double-sided 4-cutting-edge geometry, it seamlessly combines the highly rigid -CKM heavy-duty chipbreaker with the wear-resistant CD3220 premium substrate. Whether tackling abrasive casting skin, sand inclusions, or severe interrupted cuts, this insert delivers outstanding edge security and extended tool life. It is the ultimate choice for automotive components (brake discs, flywheels), heavy machinery, and pump & valve industries.

Technical Specifications

• ISO Code: DNMG150612-CKM (ANSI: DNMG443-CKM)

• Grade: CD3220 (Premium CVD coating, high wear/flaking resistance optimized for K20–K30 applications)

• Shape: D-Shape (55° Diamond)

• Relief Angle: N-Type (0° Negative rake, double-sided with 4 effective cutting edges for maximum cost-efficiency)

• Nose Radius: 1.2 mm (R1.2 / 3/64") – Heavy-duty radius for maximum edge strength, high feed rates, and deep depths of cut.

• Chipbreaker: -CKM (Cast Iron Roughing Geometry featuring a wide negative land and micrometer-level edge honing)

• Application Material: Grey Cast Iron (GG/HT), Nodular/Ductile Cast Iron (GGG/QT), Malleable Cast Iron.

 Typical Applications

• Automotive & Railway: Heavy-duty rough turning of automotive brake discs (rotors), brake drums, engine blocks, flywheels, and railway wheel hubs.

• Pumps, Valves & Energy: Initial skin-removal and face turning of large industrial pump housings, valve bodies, and heavy pipe flanges.

• General Engineering: High-efficiency roughing of large cast iron pulleys, reduction gearboxes, and machine tool bed ways.

CNC Inserts - Frequently Asked Questions

1. How do I choose the right grade for my specific machining application?

Choosing the correct grade is crucial for tool life and performance. We provide a comprehensive Grade Cross-Reference Chart that maps our CD Carbide grades to major international brands like Sandvik, Mitsubishi, and Kyocera. If you are unsure, simply provide us with the workpiece material (P, M, K, S, H) and machining conditions, and our engineers will recommend the best solution.

2. Can you provide customized CNC tools based on our drawings?

Yes. As a factory-direct manufacturer, we specialize in bespoke engineering. Whether you need non-standard dimensions, specific chipbreakers, or customized coatings for unique alloys, our technical team can develop products based on your technical drawings (PDF/STEP) or physical samples.

3. Do you offer free samples for testing before bulk orders?

We understand that "trial cutting" is the only way to verify tool stability. We offer sample packs for professional buyers to test performance on their own CNC machines. Please contact our sales team with your machine specifications and the material you are processing to request your trial samples.

4. How do you ensure the quality consistency of your carbide inserts?

Our quality control is integrated into every step of the production process in Zhuzhou. We use high-purity tungsten carbide powder and advanced PVD/CVD coating equipment. Each batch undergoes rigorous inspection, including microscopic edge analysis and hardness testing, to ensure that the performance of the 1,000th insert is identical to the 1st.

5. What is the typical lead time for international B2B orders?

For standard models in stock (such as WNMG, CNMG, etc.), we usually ship within 3-5 business days. For customized tools or large-volume OEM orders, the production cycle typically ranges from 2 to 4 weeks, depending on the complexity of the design and coating requirements.

6. Are you a manufacturer or a trading company?

We are a direct manufacturing enterprise based in Zhuzhou, the hunan of China’s tungsten carbide industry. By cutting out the middleman, we provide factory-direct pricing and faster technical support. This allows us to offer more flexible MOQs (Minimum Order Quantities) for small-to-medium-sized distributors and specialized machine shops.