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Hydraulic Cylinder Casting Components – Aluminum Die Casting
Process: High Pressure Die Casting (HPDC)
Alloys: ADC12 / A380 / AlSi9Cu3 / AlSi12Fe
Locking Force: ≤800 tons | Component Weight: ≤10 kg
Product Description
Wuxi Hengzhihui Metal Materials Co., Ltd. manufactures precision aluminum die casting components for hydraulic cylinders, including end caps (cylinder heads), pistons (low‑pressure applications), guide rings, mounting brackets, valve blocks, and rod clevises. These components are produced using high pressure die casting on machines from 80 to 800 tons clamping force, with individual part weights below 10 kg.
While hydraulic cylinder barrels and high‑pressure internal components are typically made of steel or iron, many ancillary and non‑pressure‑bearing parts can be successfully converted to aluminum die casting to achieve weight reduction, lower cost, and faster production. Our components are widely used in agricultural machinery, construction equipment, material handling, industrial hydraulics, and mobile hydraulic systems where the operating pressure is moderate (≤160 bar) or where the component does not directly contain the pressurized fluid.
Typical Hydraulic Cylinder Components We Cast
| Component | Typical Weight | Recommended Alloy | Function & Features |
|---|---|---|---|
| Cylinder end cap (head / gland) | 0.5 – 5.0 kg | ADC12 / A380 | Seals the cylinder; incorporates rod seal groove and wiper. Pressure‑tight design with impregnation. |
| Piston (low‑pressure / pneumatic) | 0.3 – 4.5 kg | A380 / AlSi9Cu3 | Guides the piston rod; lightweight for reduced inertia. Not for >160 bar hydraulic service. |
| Guide ring / bearing carrier | 0.2 – 2.0 kg | ADC12 | Supports the rod; cast‑in lubrication grooves. |
| Mounting bracket (trunnion / clevis / foot) | 0.5 – 6.0 kg | AlSi12Fe (corrosion resistant) | Attaches cylinder to equipment; high static strength. |
| Valve block (manifold) | 0.8 – 7.0 kg | A380 / AlSi9Cu3 | Integrates cartridge valves; complex internal passages. |
| Piston rod end / clevis | 0.3 – 3.5 kg | ADC12 / A380 | Connects rod to machine linkage; high impact strength. |
| Lock nut / retainer | 0.1 – 1.0 kg | ADC12 | Secures piston to rod; cost‑effective alternative to steel for low‑load applications. |
Note: For components directly exposed to full hydraulic pressure (>160 bar), we recommend steel or ductile iron. Our aluminum castings are ideal for the low‑pressure side (return line), pneumatic cylinders, lubrication systems, and structural attachments.
Material Advantages – Why Aluminum Alloys for Cylinder Components?
| Alloy | Strength (UTS) | Elongation | Corrosion Resistance | Key Benefit for Cylinder Parts |
|---|---|---|---|---|
| ADC12 | ~320 MPa | ~3.5% | Good | General purpose, good machinability for seal grooves |
| A380 | ~330 MPa | ~3.0% | Very good | Higher strength, excellent pressure tightness (with impregnation) |
| AlSi9Cu3 | ~350 MPa | ~2.5% | Good | Best high‑temperature strength for continuous duty |
| AlSi12Fe | ~300 MPa | ~4.0% | Excellent | Superior corrosion resistance for agricultural/outdoor cylinders |
Production Capabilities for Hydraulic Components
| Parameter | Our Capability |
|---|---|
| Machine tonnage | 80T – 800T (matched to component size) |
| Max part weight | ≤10 kg (single piece) |
| Wall thickness | 2.5 – 8 mm typical (ribbed designs) |
| Dimensional tolerance | IT11 – IT13 (as cast); ±0.01 mm after CNC |
| Pressure tightness | Impregnation (porosity sealing) available – up to 100 bar leak‑tight |
| Surface roughness | Ra 3.2 – 6.3 μm as cast; Ra ≤1.6 μm after machining |
| Secondary operations | CNC turning (seal grooves, threads, bearing seats), CNC milling, drilling, tapping, deburring |
| Surface finishing | Shot blasting, vibratory finishing, anodizing (Type II or III), powder coating |
Key Quality Features for Hydraulic Applications
Pressure integrity – We offer vacuum assisted die casting and impregnation (porosity sealing using sodium silicate or acrylic resin) to ensure oil‑tight performance up to 100 bar for non‑structural hydraulic passages.
Seal groove precision – Critical grooves for O‑rings, rod seals, and wipers are machined on CNC lathes with surface finish Ra ≤1.6 μm and tolerance ±0.02 mm.
Threaded ports – Cast‑then‑machined NPT, BSPP, or metric threads for fittings and plugs.
Corrosion protection – Optional anodizing (clear or hard) or e‑coating for cylinders used in wet or salty environments (agriculture, marine).
Full inspection – ZEISS CMM for dimensional report; X‑ray for porosity check (on request); pressure decay test for leak‑tight parts.
Design Recommendations for Die Cast Hydraulic Components
Avoid high pressure chambers – Use aluminum castings only for caps, brackets, low‑pressure return passages, or pilot circuits.
Increase wall thickness at threaded areas – Minimum 5 mm of material around ports.
Use ribbing – To achieve stiffness similar to iron at lower weight.
Specify impregnation – For any component that must retain oil or hydraulic fluid under pressure.
We provide DFM (Design for Manufacturing) feedback to help you convert existing steel or iron parts into castable aluminum designs.
Typical Applications
Agricultural hydraulic cylinders (steering, lift, implement)
Construction equipment (small excavator cylinders, skid steer loader)
Material handling (forklift tilt cylinders, pallet jack)
Industrial hydraulics (punch press cylinders, clamping units)
Mobile hydraulics (dump truck hoist cylinders, log splitter)
Pneumatic cylinders (all components suitable for compressed air)
Why Choose Wuxi Hengzhihui?
✅ Focus on ✅ 800T max capacity – Sufficient for end caps and brackets up to 600 mm diameter.
✅ In‑house impregnation – Pressure tightness for oil/air applications.
✅ Precision machining – CNC turning and milling for seal grooves and threads.
✅ Alloys in stock – ADC12, A380, AlSi9Cu3, AlSi12Fe – ready for production.
✅ Fast prototype – Sample castings in 20‑30 days.
✅ Global export – We ship to Europe, North America, Asia, and Middle East.
Request a Quote
Please send your 2D drawing (PDF/DWG) and 3D model (STEP/IGS) with the following information:
Operating pressure (if fluid‑contacting)
Required surface treatment
Annual quantity
We will reply with a competitive price, tooling cost, and lead time.
Contact: Alice Yuan
Phone / WhatsApp: +86 15106174543
Email: yjhtrade@gmail.com
Websites: www.hzhmetals.com | www.wuxihengzhihui.com
Wuxi Hengzhihui Metal Materials Co., Ltd. – Precision aluminum die casting for hydraulic, pneumatic, and industrial components.
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