Wholesale Hydraulic Boom Cylinder fit Hyundai Excavators
Heavy-duty boom cylinder designed for Hyundai excavators. Made from forged alloy steel with a honed barrel, induction-hardened piston rod, and high-pressure seal kits to provide stable lifting, shock absorption, and long-term durability under extreme working loads.
| 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 boom cylinder is the primary lifting actuator of the excavator, responsible for raising and lowering the entire boom-arm-bucket assembly. It plays a vital role in:
- Lifting heavy materials and breaking ground
- Absorbing downward and side forces during swing or dump cycles
- Maintaining stability on uneven or sloped ground
In machines like Hyundai R210LC, R220LC-9, or R335LC-9, the boom cylinder endures the largest vertical loads and pivot stress, particularly when lifting boulders, digging at full reach, or working on inclines.
Material Quality and Structural Design
To meet Hyundai OEM strength and reliability standards, each boom cylinder is constructed with:
- Barrel: Made from Q345B, ST52, or 27SiMn seamless tube, with precision honing < Ra 0.2μm
- Rod: Forged from 42CrMo steel and chrome-plated (≥25μm) for wear resistance
- End caps & pistons: CNC-machined and robot-welded for absolute alignment
Key Design Features
- Thickened barrel wall to resist internal pressure deformation
- Extra-wide rod diameters to reduce flex during lift
- Welded clevis or eye-type mounts to support heavy load pivoting
- Bushings with grease grooves available upon request for enhanced longevity
Cylinder Manufacturing Process
Each Hyundai boom cylinder follows a rigorous process to ensure top-tier performance:
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 cylinder is tested to withstand 1.5× working pressure and checked for leaks, stroke alignment, and valve performance. Final products are sealed and packed in export-grade wooden crates.
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.
Compatibility with Hyundai Excavators
This boom cylinder is compatible with a wide range of Hyundai models, including:
- R210LC-7 / R215-9 / R220LC-9 / R225LC-7
- R260LC-9 / R290LC-7A / R305LC-9 / R335LC-9 / R360LC-7
Not sure which cylinder fits your machine? Just send us your model number, cylinder drawing, or OEM casting code, and we’ll verify the correct match within 12 hours.
Maintenance & Replacement Tips
- Regularly check for rod straightness and chrome wear
- Reapply grease to pivot ends and inspect bushing conditions
- Replace seal kits every 1,200–1,500 working hours or upon leakage
- Avoid overextension or sudden full-stroke retraction under load
Frequently Asked Questions (FAQ)
Q1: Can this boom cylinder handle rock lifting applications?
A: Yes. Our Hyundai boom cylinders are engineered for high-load lifting cycles, including boulder lifting, quarry loading, and demolition work.
Q2: Are seal kits included with the cylinder?
A: Yes, all cylinders come assembled with new seals installed. We also provide standalone kits.
Q3: What’s the difference between this and the arm cylinder?
A: The boom cylinder controls vertical lift, while the arm cylinder controls horizontal reach and digging depth.
Q4: Do you support private labeling or OEM stamping?
A: Absolutely. We can add your logo, batch number, or casting mark based on order quantity.
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.
