Hydraulic Bucket Cylinder for Hyundai Excavators
High-performance bucket cylinder engineered for Hyundai crawler excavators. Manufactured with chrome-plated piston rods, honed steel barrels, and OEM-grade seal kits to deliver smooth, controlled bucket movement under harsh digging conditions.
| Cylinder Tube | Q345 / ST52 / 27SiMn / 20# Steel |
|---|---|
| Piston Rod | 45# / 40Cr / 42CrMo (Hard Chrome Plated) |
| Piston | Ductile Iron / Forged Steel (45# / 20Cr) |
| Cylinder Head | Q345 / 45# Steel / Cast Steel |
| Seals | Polyurethane (PU), NBR, FKM |
| Guide Bush | Bronze Alloy / Composite Materials |
| Ports & Fittings | Zinc-Plated Carbon Steel / Stainless Steel |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
The bucket cylinder is responsible for controlling the rotation and digging force of the bucket—making it one of the most heavily used hydraulic components on any excavator.
In Hyundai models such as the R210LC-7, R220LC-9, R290LC-7A, and R335LC-9, the bucket cylinder must withstand repetitive high-force cycles, abrasive soil conditions, and frequent impacts. This requires a cylinder that not only provides high pressure resistance, but also maintains seal integrity, rod straightness, and structural stability under dynamic working loads.
Material Quality and Structural Design
To handle such heavy-duty applications, each bucket cylinder is crafted using premium alloy steels such as:
- 42CrMo for the piston rod: offers excellent yield strength, fatigue resistance, and ductility
- Q345B or ST52 steel for the barrel: balances strength and machinability
Key Construction Features
- Chrome-plated rod surface (HRC ≥ 60, thickness ≥ 25μm) for corrosion resistance
- Honed barrel inner wall (< Ra 0.2μm) to reduce seal wear and extend cylinder life
- Fully CNC-machined ports and ends to ensure precise alignment with excavator mounts
- Welded or bolted end caps for secure structural integrity
Internal Cross-Sectional Diagram
This diagram helps visualize how the rod, piston, barrel, and seals interact under pressure, showing key wear zones and sealing points for effective maintenance planning.
Cylinder Manufacturing Process
Our production process is built for performance and reliability, and is supported by visual proof of quality:
Rod Polishing & Surface Prep
The piston rod is ground and polished to achieve a mirror-smooth surface, ready for hard chrome plating. This step reduces wear on seals and ensures long-lasting hydraulic performance.
Assembly & Sealing
In a cleanroom assembly area, the barrel, piston, rod, and end caps are fitted and torqued to spec. Seal kits are carefully installed to prevent fluid loss and contamination.
Pressure Testing & Export Packaging
Each unit is pressure tested to 150–200 bar or above, based on model class. Finished cylinders are oil-treated, sealed with protective caps, and packed in durable wooden crates for global delivery.
OEM Undercarriage Parts for Hyundai Excavator
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| HYUNDAI | R55 | R55-3 | R55-7 | R60 | R60-7 | R60CR-9 | R75-7 | R80 |
| R80-7 | R80CR-9 | R130-5 | R130-7 | R140LC-9 | R145LCR-9 | R150 | R150LC-7 | |
| R160LC-3 | R180LC-3 | R200 | R200-5 | R210 | R210-3 | R210LC-3 | R210LC-7 | |
| R215-7 | R220-5 | R220LC-9 | R225-7 | R235LCR-9 | R250LC-3 | R260-5 | R260LC-9 | |
| R265 | R275 | R290 | R290LC-3 | R290LC-7 | R300 | R300-5 | R300LC-9 | |
| R305 | R320 | R320LC-9 | R330LC-9 | R360 | R360LC-9 | R380LC-9 | R385 | |
| R420 | R450-3 | R450-5 | R450LC-7 | R480LC-9 | R500LC-7A | R520LC-9 | R800LC-7A | |
| HX90A | HX1000L | HX130A LCR | HX145LCR | HX220L | HX235LCR | HX260L | HX300L | |
| HX330L | HX380L | HX480L | HX520L | HX800L | HW100A | HW140 | HW180 | |
| HW210 | ||||||||
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Hyundai Excavator Compatibility
This bucket cylinder is compatible with the following Hyundai models:
- R210LC-7 / R215-7 / R220LC-9
- R290LC-7A / R305LC-7 / R335LC-9 / R360LC-7
Custom cylinder sizes or OEM variants also available upon request
Not sure which cylinder fits your machine? Just send us your machine model, casting code, or technical drawing, and our engineers will confirm compatibility within 12 hours.
Maintenance Tips for Bucket Cylinder Longevity
- Keep rod surfaces clean and well-lubricated
- Avoid full-stroke impact under heavy loads
- Replace seal kits every 1,000–1,500 hours for optimal pressure retention
- Regularly inspect for rod scoring or weld fatigue at mounting points
Frequently Asked Questions (FAQ)
Q1: Will this cylinder fit my R220LC-9?
A: Yes. Please send us your OEM number or cylinder dimensions—we'll verify the fitment within 12 hours.
Q2: Can I replace just the seals instead of the full cylinder?
A: If the barrel and rod are undamaged, you can replace only the seal kit. We also offer standalone seal kits upon request.
Q3: Do you offer OEM or aftermarket versions?
A: Both. We manufacture cylinders to match OEM specifications, and also offer performance-enhanced versions upon request.
Q4: Can I order the cylinder with bushings and pins included?
A: Absolutely. We can provide a full mounting set including bushings, pins, grease seals, and lock rings.
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
