Why are small parts not recommended for iron casting?

Not recommended. We select the most stable, reasonable and cost-effective manufacturing process according to each part’s structure, size, technical requirement, order quantity and application to guarantee final assembly performance.

Common defects: porosity, sand holes, shrinkage cavities, cracks, deformation, slag inclusion and rough surface. These are unavoidable industrial limitations of casting technology.

Casting requires mold making, pouring, cooling, sandblasting, heat treatment, inspection and secondary finishing. CNC machining needs no molds, so production is much faster.

Casting is a thermal forming process. Cooling of the High-temperature molten metal causes shrinkage, deformation and dimensional tolerance deviation, which are inherent casting characteristics. CNC machining at room temperature achieves much higher accuracy, concentricity, flatness, and overall geometric consistency.

The minimum order quantity varies for different products. Regarding casting parts, in samples stage, 1pc for test is OK; for batch production, normally 100pcs is required. Regarding industrial chains, normally 50m is required.
Upon your request, customized machining and casting of metal parts can be done in small batches.
After receiving your product drawings, we will evaluate and let you know the MOQ accordingly.

We perform raw material incoming inspection, production process dimension inspection, and complete final inspection before shipment. Upon customer request, material certification and dimensional inspection reports can be provided; Key products can support third-party inspection.
If needed, the heat-treated components will undergo hardness testing; The chain will undergo a tensile test, and we will provide you with complete inspection report before shipment.