Custom cast iron end cover
Our custom cast iron end covers are precision sand-cast and machined for electric motors, centrifugal pumps, gearboxes, and industrial rotating equipment. Each end cover is manufactured to your exact drawing, with CNC-machined mating faces, bolt hole patterns, bearing seat bores, and shaft seal housings held to tight dimensional tolerances. Grey iron and ductile iron options are available, with OEM and ODM support and sample production available before mass order commitment.
*Provide your application requirements—such as stress conditions, materials, size range, and even product name. We are always available for customization, so please contact us directly.
Introduction
Why Choose Our Cast Iron End Covers?
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Precision Machined Mating Faces — All critical sealing and mating surfaces are CNC-machined to your specified flatness and surface finish requirements, ensuring leak-free assembly and accurate bearing alignment in motor and pump applications.
Custom Bolt Hole Pattern & Bearing Seat — Bolt circle diameter, hole count, bearing seat bore, and shaft seal groove dimensions are all machined to your drawing, ensuring direct drop-in compatibility with your existing motor or pump housing.
Grey Iron & Ductile Iron Options — Grey iron provides excellent vibration dampening and machinability for standard motor end covers, while ductile iron offers superior impact resistance and tensile strength for high-pressure pump and gearbox applications.
Sand Casting for Complex Geometries — The sand casting process allows accurate reproduction of complex internal profiles, including volute chambers, reinforcing ribs, and multi-port configurations seen in centrifugal pump end covers.
Full Dimensional Inspection Report — Each sample and production batch is accompanied by a dimensional inspection report covering all critical features, ensuring consistent quality across large OEM production runs.
Specifications
Category Specifications & Technical Details Product Name Custom cast iron end cover Scope of Services • Custom Casting & Manufacturing (OEM/ODM)
• High-Precision CNC Machining
• Prototype Design & Batch Production
• Sealing Solution Engineering
• Reverse Engineering based on samples or drawingsMaterials • Grey Cast Iron (HT200, HT250, HT300 / GG20, GG25, GG30)
• Ductile/Nodular Iron (QT400, QT450, QT500 / GGG40, GGG50)
• Alloyed Cast Iron for specialized thermal or mechanical stress
• High-Damping Iron for vibration reductionMachining Processes • CNC Precision Turning & Milling
• High-Accuracy Boring for bearing seats (IT6-IT7 tolerances)
• Surface Facing & Grinding for perfect sealing flatness
• Multi-axis Drilling & Tapping for mounting patterns
• Heat Treatment (Stress Relief Annealing)Target Industries • Electric Motors & Industrial Generators
• Centrifugal & Industrial Pumps
• Gearboxes & Mechanical Power Transmissions
• Air & Gas Compressors
• Hydraulic & Pneumatic Cylinders
• Automotive Engines & TransmissionsSurface Treatment • Industrial Anti-rust Primer & Painting (Custom colors)
• Epoxy Powder Coating for chemical resistance
• Phosphating & Black Oxide for corrosion protection
• Shot Peening & Sandblasting for surface uniformity
• Precision Oiling for transit protectionInspection Facilities • Pressure/Leak Testing (Hydrostatic/Pneumatic for sealing integrity)
• CMM (Coordinate Measuring Machine) for geometric tolerances
• Spectrometer for material grade certification
• Roughness Tester (Ensuring sealing surface finish)
• Hardness Tester & Ultrasonic Flaw DetectionOur Advantages 1. Leak-Free Assurance: 100% leak testing ensures reliable containment of lubricants/fluids.
2. Precise Concentricity: High-accuracy boring ensures optimal bearing alignment and life.
3. Superior Heat Dissipation: Material grades chosen for optimal thermal management.
4. Zero Porosity: Advanced casting processes ensure vacuum-tight integrity.
5. Cost Efficiency: Optimized vertical management from casting to finish machining.
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Let’s talk about your next project !
I don't have complete drawings, can I send inquiry?
Yes, we can help you analyze based on your description, samples and photos.
I am not sure if you can do my parts?
Most of our customers come to us because “others say they can’t do it”.
Are you a factory or a trader?
We are a factory and have a project management team that can handle the technology, cost and delivery at the same time.
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