QT450 Ductile Iron Gearbox Housing
Custom Iron Casting & Machining Service — From Your Drawing to Finished Parts
This Ductile Iron Gearbox Housing is a core structural component designed for Special-purpose vehicles transmission systems . It is manufactured by our in-house Sand Casting (Green Sand Molding) + CNC precision machining process to achieve high strength, precise bearing bore geometry, and reliable oil-tight sealing. The use of ductile iron QT450 provides an excellent balance of high tensile strength , superior elongation and impact toughness, and excellent fatigue resistance under cyclic loading — delivering a housing that resists cracking under heavy operational loads, maintains precise shaft alignment across bearing seats, and provides leak-free oil containment across wide temperature ranges.
Matech's one-stop approach, covering pattern making, green sand casting, annealing/ferritizing heat treatment, CNC machining (bearing bores, gasket faces, dowel holes, threaded holes), leak/pressure testing, surface treatment (anti-rust primer and finish coating), and engineered packing, ensures this gearbox housing offers excellent pressure tightness, tight dimensional tolerances on bearing bores and dowel locations,performing reliably in demanding heavy-duty transmission and powertrain environments.
design customization
Please fill out the form below to request a quote or to request more information about us. Please be sure to upload customized requirement documents or pictures, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Custom Sand Casting QT450 Iron Transmission Mechanical Gearbox Casting
| Specification | Details for This Case | Matech’s Capability / Notes |
| Alloy Grade | QT450 | We work with Gray Cast Iron(HT150, HT200, HT250, HT300),Ductile Cast Iron(QT400-18,QT500-7,QT600-3,QT700-2),Vermicular Graphite Cast Iron(RuT300,RuT400),Alloy Cast Iron(Heat-resistant,Corrosion-resistant grades),with material certification provided |
| Unit Weight | 25 kg | We can handle iron casting parts from 0.1 kg ~ 50 kg |
| Overall Dimensions | 350 × 300 × 250 mm | Maximum machining size approximately 1200 × 1000 × 600 mm, subject to drawing confirmation |
| Casting Tolerance | CT8-CT10 (GB/T 6414) | Achieved via our in-house precise tooling and stable assembly line production process |
| Machining Tolerance | H7-precision hole | Achieved by 3/4/5-axis CNC centers. Tighter tolerances can be discussed,with best achievable tolerance up to 0.005 mm |
| Surface Roughness | Ra 25 μm (unmachined surface) / Ra 1.6 µm (machined surface) | Typical machined surface roughness can reach Ra 0.8–3.2 μm (turning/milling); Ra 0.4–0.8 μm achievable after grinding |
| Min. Wall Thickness | 10mm | We specialize in thin-wall castings; min. 3.0 mm (for iron castings)feasible depending on geometry. |
| Heat Treatment | Artificial Aging Treatment (Stress-Relief Annealing) | Annealing, normalizing available for iron castings |
| Surface Treatment | No additional Surface Treatment | Options: Sandblasting / Shot Blasting, Painting (Spraying / Dipping),Dacromet Coating,Black Electrophoresis (ED-Coating),Anti-rust Oil etc. Corrosion resistance per your spec. |
| Application | Vehicles and machinery | We serve Mining, automotive, industry equipment, machinery, pump & valve, new energy, etc. |
| MOQ | 500 pcs | Flexible MOQ, starting from prototype/small batch quantities. |
| Sample Lead Time | 25-40 working days (with new tooling) | Defined upon drawing review. Expedite options available. |
| Production Lead Time | 30-45 working days | Based on order quantity and complexity, confirmed in contract. |
| Drawing Formats | STEP, IGES, X_T, DWG, PDF | We process all standard 2D/3D formats. |
| Customizable | Manufactured according to drawings or samples | Every aspect—material, geometry, tolerance, finish—is built to your design. |
| Certification | ROHS,ISO 9001:2015 | Material certificates, dimensional inspection reports, and PPAP Level 3 documentation available upon request for automotive and critical components |
| Packing | Custom PE foam + plywood crate | Engineered packing designed for your part’s specific fragile/critical areas. |
Customization Options
Every casting project starts with your unique design and requirements. Whether it's iron, steel, or aluminum, we tailor every aspect of the manufacturing process to your exact specifications. Below are the key dimensions you can customize with Matech — your drawing is our only standard.
Material Selection
From aluminum alloy to grey/ductile iron to carbon steel/stainless steel — we pour the alloy your design demands. Custom compositions are welcome. Full material certification included.
Casting Process
Our engineers tailor the most suitable manufacturing process to your specific needs based on your part's geometry, volume, and performance requirements, ensuring the optimal balance between quality and cost.
Dimensional Accuracy & Machining
We machine to your exact tolerances. In-house 3/4/5-axis CNC with custom fixtures. Casting tolerance CT4-CT11, machining tolerance down to ±0.005mm.
Heat Treatment
MATECH provides a full range of heat treatment services, including: Annealing, Normalizing, Quenching, Tempering, Carburizing, Nitriding, Solution Treatment.
Surface Treatment & Coating
Matech support: Sandblasting / Shot Blasting, Chemical Degreasing, Pickling/Passivation, Mechanical Grinding / Polishing, Zinc Plating, Hard Chrome Plating, Electroless Nickel Plating, Anodizing,Dacromet, Powder Coating, Black Oxide, Stainless Steel Passivation.
Testing, Documentation & Packaging
From material certificates to complete customs clearance documents, and from custom pallets to packaging optimized for your product's specific characteristics. Your parts arrive fully documented, well-protected, and ready for immediate use.
Our Advantages
Technical Advantages
1
Pattern shop, shell molding & resin sand casting lines, CNC machining, heat treatment, and inspection lab — all centralized under one roof. No outsourcing. From base iron melting to finished and coated part, we maintain full control over lead time, quality consistency, and batch traceability.
2
Before pattern production begins, we provide a detailed DFM report covering solidification behavior, graphite morphology control, gating & riser design, core assembly strategy, and machining allowance optimization. We flag potential shrinkage areas and hard spots early, helping you refine the design for better castability and lower cost.
3
We specialize in geometrically demanding parts with complex internal cavities, multi-core assemblies sections — such as chasis brackets, valve bodies, gearboxes, engine blocks, and cylinder heads. Our shell molding process delivers superior surface finish and tight dimensional tolerances, while resin sand casting handles larger, heavier components with excellent core integrity. We pour a full range of grades — grey iron (HT150–HT350), ductile iron (QT400-18 to QT700-2)— with in-house heat treatment to tailor hardness, strength, and toughness to your specification.
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Service Advantages-总部接待区 1 拷贝
Material Advantages
1
We charge carefully proportioned pig iron, steel scrap, and ferroalloys (FeSi, FeMn, nodulizer) into our electric induction furnaces. Carbon equivalent, silicon content, and alloying elements are spectrometer-verified and adjusted in real time before tapping. Precise inoculation and nodulization practices ensure consistent graphite morphology and mechanical properties across every pour.
2
Every production batch is identified by a unique heat number. Chemical composition reports, mechanical test records (tensile strength, yield strength, elongation, hardness, and for ductile iron — impact toughness), metallographic analysis (graphite nodularity, matrix structure), and heat treatment charts are compiled into a traceable dossier — from furnace charge to finished casting.
3
We pour a comprehensive range of grey iron (HT150–HT350), ductile iron (QT400-18 to QT700-2), austempered ductile iron (ADI), Ni-resist, and high-Si-Mo ductile iron. Whether your application demands vibration damping, high strength with ductility, thermal resistance, or corrosion resistance, we match the grade and heat treatment to your requirements.
Service Advantages
A dedicated project manager oversees the entire process — from design review to final delivery — ensuring efficient communication at every stage.
Quotations are typically provided within 24–48 hours. Production progress is updated regularly through photos and production data, with continuous customer feedback collection throughout the project.
Full batch traceability and 24-hour response to quality-related issues ensure reliable post-delivery support.
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Contact Us
Contact us now! Our technical team and mechanical engineers are ready to provide one-stop support for your project from requirement review, quotation to delivery.
Send E-Mail If You Need Any HelpProfessional Manufacturer of Precision Metal Parts & Conveyor Chains
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E-mail: ma@matechin.com
Tel: 0086 21 56076732
Mobile Phone: 0086 13818971637
Address: 1st Floor, Building 8, No. 868 Xinge Road, Xinqiao Town, Songjiang District, Shanghai, China
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