Rongbao Enterprise delivers industrial-grade Bearing Cap Cast Iron Casting solutions engineered for demanding mechanical applications. Since 2003, we've specialized in precision casting and machining with proven capabilities across gravity casting, sand casting, and CNC finishing. Our bearing cap castings meet ISO 9001:2015, ISO 14001, and ISO 45001 standards, supporting equipment manufacturers in the United States, Europe, and Japan. With 14 utility model patents and National High-Tech Enterprise certification, we produce up to 5,000 pieces per order. Each product undergoes rigorous shot blasting and precision machining to deliver components weighing 2.3kg with tolerances critical for crankshaft support and rotating shaft alignment.

A bearing cap is a structural enclosure used to secure bearings to rotating shafts in engines and heavy machinery. Cast iron has a high carbon (2-4%) and silicon content that provide it excellent compressive strength and wear resistance.
The casting technique converts molten iron alloy into finely formed caps. They are poured into previously specified moulds and cooled in a controlled manner to provide parts with dimensional stability.
These caps help keep the shaft of your machines aligned. They reduce excessive friction and early wear in essential rotating assemblies.

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Parameter
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Details
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Material
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A356 aluminum alloy / Cast iron variants
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Weight
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2.3 kg
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Casting Process
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Gravity casting, Sand casting
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Machining
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CNC precision machining
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Surface Treatment
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Shot blasting
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Production Capacity
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5,000 pieces per batch
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Certification
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ISO 9001:2015, ISO 14001, ISO 45001
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Customization
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OEM/ODM available
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MOQ
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Approximately 100 pieces
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Lead Time
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20-30 working days (regular orders)
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Packaging
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Wooden box for secure transport
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Origin
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Xi'an, China
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Multi-Process Integration
Rongbao combines gravity casting and sand casting to achieve complex geometries. Our integrated workflow eliminates coordination delays:
Mold Development → Casting → CNC Machining → Shot Blasting → Quality Inspection → Packaging
This one-stop approach reduces your supplier management burden. You receive finished components ready for assembly.
Precision Machining Standards
CNC machining delivers the tight tolerances your assemblies demand. Line boring ensures bearing tunnels maintain perfect roundness.
Flatness, parallelism, and perpendicularity specifications meet engine-grade requirements. Our machining centers handle the complex splitting operations bearing caps require.
Quality Control Systems
Every Bearing Cap Cast Iron Casting passes through multi-stage inspection protocols. Dimensional verification confirms adherence to your technical drawings.
Material composition analysis guarantees consistent mechanical properties. Shot blasting removes surface irregularities while improving fatigue resistance.
Bearing cap castings support critical functions across multiple sectors:
· Automotive Engines: Crankshaft bearing support in combustion engines
· Industrial Machinery: Heavy-duty rotating shaft assemblies
· Power Generation Equipment: Turbine bearing housings
· Agricultural Machinery: Transmission and drivetrain components
· Mining Equipment: High-load bearing applications
Your application determines specific material grades and machining requirements. Our technical team recommends optimal specifications based on load conditions and operating environments.

Proven Experience in Global Supply
We export 70% of our production to foreign markets. We have experience in cross-border logistics, which will help your North American or European business.
Our supplier reliability was underlined by ABB's rigorous SSBM audit validation. On-time delivery performance has always kept client production delays at bay.
Flexibility to Fit You
Upload your CAD files, 3D models or technical specs. Our engineers customise casting techniques around your specific needs.
We can scale from 100 prototypes to 5,000-piece production runs to fit your project timetable. With ODM services, you can collaborate with us from the design to manufacture.
Patent Portfolio Technical
We possess 14 utility model patents, including proprietary techniques for sophisticated core preparation. These innovations target the challenges of complex casting geometries.
Defect rates are lowered and dimensional uniformity is improved via patented technology. You get parts designed with advanced manufacturing knowledge.

Q: What materials do you use for bearing cap castings?
A: We primarily work with A356 aluminum alloy and various cast iron grades. Material selection depends on your load requirements, operating temperature, and corrosion resistance needs. Our team recommends the optimal alloy after reviewing your application specifications.
Q: Can you match existing bearing cap designs?
A: Yes. Provide samples, technical drawings, or 3D models. Our reverse engineering capabilities replicate dimensions and mechanical properties. We'll produce prototypes for your approval before batch production begins.
Q: What tolerances can you achieve with CNC machining?
A: Our machining centers maintain tolerances within ±0.02mm for critical dimensions. Bearing tunnel roundness and bore alignment meet engine-grade specifications. Specific tolerance requirements should be noted in your technical drawings.
Q: How do you ensure consistent quality across production batches?
A: ISO 9001:2015 certification governs our quality management system. Each batch undergoes material composition analysis, dimensional inspection, and surface finish verification. We maintain traceability records linking raw materials to finished components.
Q: What is your typical lead time for custom orders?
A: Mold manufacturing requires 15-25 days. Batch production takes 7-20 days after mold approval. Total lead time for custom projects averages 20-30 working days. Rush orders may be accommodated depending on production schedule—contact us to discuss expedited timelines.
Q: Do you provide surface treatment options beyond shot blasting?
A: Yes. We offer painting, powder coating, anodizing, and other treatments based on your environmental exposure requirements. Shot blasting is standard for bearing caps to improve surface hardness and remove scale.
Ready to discuss your Bearing Cap Cast Iron Casting requirements? Email steve.zhou@263.net with your drawings or project details.
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