Industrial Robot Arm Body Castings Sand Casting For Industrial Robot Structures
This Industrial Robot Arm Body Castings is a core structural and load-bearing component designed for automated production line robotic arms. Weighing approximately 45 kg with overall dimensions of 1000 × 500 × 300 mm, it is manufactured by our in-house Sand Casting (Resin Sand Shell Molding) + CNC precision machining process to achieve high strength, precise joint interface geometry, and reliable structural rigidity. The use of ductile iron QT600-3 provides an excellent balance of high tensile strength (≥600 MPa), superior stiffness under cantilevered loads, and excellent vibration damping capacity .
Matech's one-stop approach, covering pattern making, resin sand shell molding casting, annealing heat treatment, CNC machining (joint mounting faces, bearing seats, dowel holes, internal cable routing channels, threaded interfaces), dimensional and geometric tolerance inspection, surface treatment (red anti-rust primer), and engineered packing, ensures this robot arm body offers excellent joint interface accuracy, tight dimensional tolerances on bearing seats and mounting faces, and a ready-to-assemble finish — performing reliably in demanding industrial automation and high-payload robotic 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 Large Structural Casting Sand Casting High-Stiffness Robot Arm Body— Matech
| Specification | Details for This Case | Matech’s Capability / Notes |
| Alloy Grade | QT600-3 | 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 | 45kg | We can handle iron casting parts from 0.1 kg ~ 50 kg |
| Overall Dimensions | 1000 × 500 × 300 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 | ±0.02mm | 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 | 5mm | 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 | Red Painting | Options: Sandblasting / Shot Blasting, Painting (Spraying / Dipping),Dacromet Coating,Black Electrophoresis (ED-Coating),Anti-rust Oil etc. Corrosion resistance per your spec. |
| Application | Industrial Robot Structures | We serve Mining, automotive, industry equipment, machinery, pump & valve, new energy, etc. |
| MOQ | 200 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 up 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
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.
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. For large structural castings like this 45 kg robot arm body, we pay special attention to wall thickness transitions and internal rib design to minimize shrinkage risk while preserving structural stiffness.
We specialize in geometrically demanding parts with complex internal cavities and multi-core assemblies — such as robot arm bodies, chassis brackets, valve bodies, gearboxes, and cylinder heads. Our shell molding process delivers superior surface finish and tight dimensional tolerances on joint mounting faces, while resin sand casting handles larger, heavier components like this 1000 mm-long arm body with excellent core integrity for internal cable channels. 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.
Service Advantages-总部接待区 1 拷贝
Material Advantages
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 — critical for maintaining uniform QT600-3 strength across a 45 kg structural casting.
Every production batch is identified by a unique heat number. Chemical composition reports, mechanical test records (tensile strength, yield strength, elongation, hardness, and impact toughness), metallographic analysis (graphite nodularity, matrix structure), and heat treatment charts are compiled into a traceable dossier — from furnace charge to finished casting.
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 for precision motion, high strength with ductility for load-bearing structures, or thermal resistance for demanding environments, 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 and a single point of contact for all technical and commercial matters.
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. For large structural castings, we provide first-article inspection reports before batch production begins.
Full batch traceability and 24-hour response to quality-related issues ensure reliable post-delivery support. MOQ starting from 200 pieces for this product category, with flexible ramp-up options for pilot orders.
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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.
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