Ductile iron and gray iron are among the most widely used materials in automotive, machinery, and energy equipment manufacturing. Components such as engine blocks, gearbox housings, brake discs, and pump bodies require efficient, high-volume machining after casting. For these applications, ceramic cutting inserts have become a key tooling solution — offering the high-temperature hardness and wear resistance needed to achieve cutting speeds that conventional carbide inserts cannot sustain.
This case study documents a field cutting verification of our SNGN120412S02020-HLS05 ceramic inserts for high-speed milling of ductile iron and gray iron. Conducted on a Heller H5000 CNC machine with HSK100 tool holders, the test achieved successful domestic replacement of imported ceramic inserts — delivering comparable tool life under identical machining conditions, with a significant cost advantage.
Core result: SNGN120412S02020-HLS05 ceramic inserts successfully replaced imported brand ceramic inserts. Under identical machining conditions, tool life was comparable, while cost performance was significantly improved — providing a reliable domestic solution for high-speed cast iron milling.
The objective of this field cutting verification was to evaluate whether our ceramic inserts could serve as a domestic replacement for imported brand ceramic inserts in high-speed milling of cast iron components. The test was designed to compare tool life and machining performance under identical conditions — same machine, same workpiece material, same cutting parameters.
| Parameter | Details |
|---|---|
| Insert Model | SNGN120412S02020-HLS05 |
| Workpiece Material | Ductile iron & gray iron |
| Machine Tool | Heller H5000 |
| Tool Holder | HSK100 |
| Objective | Domestic replacement of imported ceramic inserts |
Two milling cutter configurations were tested. The D125 cutter body was used for larger-diameter face milling operations, while the D50 cutter body was used for smaller-diameter applications. Both configurations operated at high cutting speeds typical of ceramic insert cast iron machining.
| Parameter | D125 Milling Cutter | D50 Milling Cutter |
|---|---|---|
| Cutting speed (Vc) | 980 m/min | 650 m/min |
| Feed per tooth (Fz) | 0.15 mm/tooth | 0.17 mm/tooth |
| Number of teeth (Z) | 13 | 5 |
| Spindle speed (S) | 2500 rpm | 4140 rpm |
| Table feed (F) | 4900 mm/min | 3620 mm/min |
Parameter insight: The D125 configuration achieved a cutting speed of 980 m/min with a feed rate of 4900 mm/min — speeds that demonstrate the high-temperature stability advantage of ceramic inserts. Conventional carbide inserts would experience rapid wear at these cutting speeds on cast iron materials.
The field cutting verification successfully demonstrated that the SNGN120412S02020-HLS05 ceramic inserts can serve as a domestic replacement for imported brand ceramic inserts. The key findings were:
| Evaluation Metric | Result |
|---|---|
| Tool life comparison | Comparable to imported ceramic inserts under identical conditions |
| Cost performance | Significant cost advantage over imported products |
| Machining quality | Stable, consistent with production requirements |
| Domestic replacement status | Successfully completed |
Bottom line: Under identical machining conditions on the same Heller H5000 machine, our ceramic inserts delivered tool life comparable to the imported brand — while providing a significant cost advantage that improves the overall cost-performance ratio for cast iron milling operations.
Our SNGN120412S02020-HLS05 ceramic inserts are engineered for high-speed milling of ductile iron and gray iron in automotive, machinery, and energy equipment manufacturing. Field-verified on Heller H5000 equipment with cutting speeds up to 980 m/min, these inserts have proven their ability to replace imported ceramic inserts with comparable tool life and superior cost performance. Whether you are machining engine blocks, gearbox housings, brake discs, or pump bodies, our ceramic inserts deliver the high-temperature stability, wear resistance, and machining consistency your cast iron production demands. Contact us to discuss your specific workpiece material and machining parameters.
Cast iron materials — particularly ductile iron and gray iron — are common in automotive and industrial component manufacturing. While these materials are machinable with carbide inserts, high-volume production environments demand higher cutting speeds and longer tool life to achieve acceptable cost per workpiece.
Ceramic inserts offer two key advantages for cast iron machining:
| Advantage | How It Benefits Cast Iron Machining |
|---|---|
| High-temperature hardness | Maintains cutting performance at elevated temperatures generated during high-speed milling |
| Wear resistance | Extends tool life in batch production, reducing insert changes and machine downtime |
In this case study, cutting speeds of 650–980 m/min were achieved — levels that would cause rapid wear in conventional carbide inserts. For high-volume cast iron production, the combination of higher machining efficiency and longer tool life often results in lower cost per workpiece, despite the higher per-insert cost of ceramic tooling.
For many Chinese and international manufacturers, imported ceramic inserts have been the default choice for high-speed cast iron machining. However, long lead times, supply chain volatility, and premium pricing create ongoing operational and cost challenges.
This case study demonstrates that a properly engineered domestic ceramic insert can deliver:
By successfully completing the domestic replacement of imported ceramic inserts, this case provides a proven, reliable, and cost-effective alternative for manufacturers seeking to optimize their cast iron machining tooling strategy.
If you are currently using imported ceramic inserts for ductile iron or gray iron machining and want to evaluate a domestic alternative, our SNGN120412S02020-HLS05 ceramic inserts offer a field-verified solution. Send us your workpiece material, current insert model, cutting parameters, and machine tool information. Our technical team will evaluate your application conditions and recommend the appropriate ceramic insert solution — with the confidence of a proven field replacement case behind it.
This case study documents a successful field cutting verification of SNGN120412S02020-HLS05 ceramic inserts for high-speed milling of ductile iron and gray iron. Tested on a Heller H5000 machine with HSK100 tool holders, the inserts achieved cutting speeds up to 980 m/min and feed rates up to 4900 mm/min — while delivering tool life comparable to imported brand ceramic inserts under identical conditions.
The result: a successful domestic replacement that provides cast iron component manufacturers with a reliable, high-performance, and cost-effective ceramic insert solution for high-speed milling of ductile iron and gray iron.
Yes. Ceramic inserts are well-suited for high-speed milling of ductile iron and gray iron. In this case study, SNGN120412S02020-HLS05 ceramic inserts achieved a cutting speed of 980 m/min and feed rate of 4900 mm/min on ductile iron using a D125 milling cutter on a Heller H5000 machine. Ceramic inserts maintain hardness at elevated temperatures, enabling cutting speeds that conventional carbide inserts cannot achieve on cast iron materials.
Two parameter sets were used. For the D125 milling cutter: cutting speed Vc=980 m/min, feed per tooth Fz=0.15 mm/tooth, 13 teeth, spindle speed S=2500 rpm, feed rate F=4900 mm/min. For the D50 milling cutter: cutting speed Vc=650 m/min, feed per tooth Fz=0.17 mm/tooth, 5 teeth, spindle speed S=4140 rpm, feed rate F=3620 mm/min.
The SNGN120412S02020-HLS05 is a ceramic cutting insert designed for high-speed milling of cast iron materials, including ductile iron and gray iron. In this case study, it was tested on a Heller H5000 machine with HSK100 tool holder and successfully achieved domestic replacement of imported ceramic inserts, delivering comparable tool life under identical machining conditions while providing superior cost performance.
Yes. This case study demonstrates that the SNGN120412S02020-HLS05 ceramic insert achieved successful domestic replacement of imported ceramic inserts. Under identical machining conditions on a Heller H5000 machine, tool life was comparable to the imported product, while delivering a significant cost advantage that improves the overall cost-performance ratio for cast iron milling operations.
Ceramic inserts offer higher hardness and better high-temperature stability than carbide, enabling significantly higher cutting speeds for cast iron machining. In this case study, cutting speeds of 650-980 m/min were achieved — speeds that would cause rapid wear in conventional carbide inserts. For high-volume cast iron production such as automotive components, the higher machining efficiency and longer tool life of ceramic inserts often result in lower cost per workpiece despite the higher per-insert cost.
