OEM Excavator EX300 H-link Parts for Hitachi
Precision-forged H-link bracket for Hitachi EX300 series excavators. Engineered for stability and durability under heavy-duty digging, lifting, and loading operations. CNC-machined and anti-corrosion treated for long-lasting performance in demanding job sites.
| Colors | Black or yellow or customized |
|---|---|
| Surface Hardness | HRC52-58 |
| Material | Q235B, Q345B |
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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.
What Is the Function of the SK60 H-Link?
The H-link—or boom-arm connecting bracket—is a pivotal structural joint that links the bucket and stick (arm) on your EX300 excavator. It guides the motion of the front working group while absorbing immense pressure during digging and material handling.In medium-to-large class excavators like the Hitachi EX300, the H-link faces frequent lateral shock, rotational force, and vertical compression during rock excavation, trenching, and bulk material transfer. Maintaining a perfectly aligned, wear-resistant H-link is key to preserving the integrity of both hydraulic and structural systems.
A deteriorated H-link can cause uneven load transfer, premature pin and bushing wear, or even cylinder side-load issues. That’s why a reliable, OEM-standard H-link isn’t just a replacement—it’s a critical upgrade to protect your machine’s core functions.
Built to Withstand Pressure: Materials & Manufacturing
Our EX300 H-links are manufactured using Q345B or Q235B structural steel, with forging as the primary shaping method to ensure strength and internal integrity. After forging, CNC machining is applied to critical surfaces to ensure alignment and accurate fitment at the pin holes and joint faces.
Where necessary, localized heat treatment reinforces fatigue-prone areas. The entire part is then shot-blasted and coated with an anti-corrosion primer or electrophoretic coating, depending on the your preference. These protective layers guard the surface against moisture, abrasive particles, and long-term exposure to harsh environments.
Each component passes a comprehensive inspection stage—including dimensional accuracy checks, pinhole tolerance verification, and surface treatment validation—ensuring every H-link meets OEM-level performance.
Pre-Machining Storage
Before final processing, each H-link is carefully stored after forging and initial shaping. You can see the robust raw units neatly stacked and ready for CNC machining and heat treatment — a testament to our in-house forging capability and batch processing control.
Export-Ready Packaging
Once machining, inspection, and anti-rust treatment are complete, the finished H-links are securely packed in palletized crates or wooden boxes, ensuring safe transport over long distances. All packages are labeled for easy identification and can be customized with your logo or barcode if required.
Compatibility and OEM Reference Numbers
This H-link is designed to fit Hitachi EX300 and its compatible variants, including:
- EX300-1 / EX300-2 / EX300-3 / EX300-5 / EX300LC
If you’re unsure of the specific part number, send us your serial number, casting code, or dimensional drawing—we’ll confirm compatibility within 12 hours.
OEM Undercarriage Parts for Hitachi Excavator
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| HITACHI-EX/ZAX/ZX | EX30 | EX40 | EX55 | EX60 | EX60-2 | EX60-3 | EX60-5 | EX70 |
| EX75 | EX100 | EX100-3 | EX100-5 | EX120 | EX120-1 | EX120-3 | EX120-5 | |
| EX130-1 | EX200-1 | EX200-2 | EX200-3 | EX200-5 | EX200LC-1 | EX200LC-2 | EX200LC-3 | |
| EX200LC-5 | EX220-3 | EX220-5 | EX270 | EX270-1 | EX270-2 | EX270-5 | EX270LC-1 | |
| EX270LC-2 | EX270LC-5 | EX300 | EX300-1 | EX300-2 | EX300-3 | EX300-5 | EX300A | |
| EX300LC-1 | EX300LC-2 | EX300LC-3 | EX300LC-5 | EX330 | EX370 | EX400-1 | EX400-2 | |
| EX400-3 | EX400-5 | EX400LC-1 | EX400LC-2 | EX400LC-3 | EX400LC-5 | EX450 | EX450-1 | |
| EX450-2 | EX450-3 | EX450-5 | EX450LC-1 | EX450LC-2 | EX450LC-3 | EX450LC-5 | UH07-7 | |
| ZAX30 | ZAX55 | ZAX200 | ZAX200-2 | ZAX330 | ZAX450-1 | ZAX450-3 | ZAX450-5 | |
| ZX30 | ZX33 | ZX38U | ZX40 | ZX55 | ZX60 | ZX70 | ZX75US | |
| ZX120 | ZX130 | ZX160LC | ZX200 | ZX210 | ZX240 | ZX270 | ZX330 | |
| ZX360 | ZX400 | ZX450 | ZX470 | ZX500 | ZX650 | ZX850 | ZX870 | |
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Performance in Harsh Conditions
Hitachi EX300 excavators are frequently deployed in high-demand conditions—quarrying, road foundation construction, pipeline excavation, and heavy lifting. In these environments, the H-link must remain structurally rigid while still allowing smooth articulation between the boom and stick.
This upgraded H-link is built to endure the vibration, impact, and debris abrasion that come with long-term field use. Whether you’re trenching in rocky terrain or lifting heavy slabs, it maintains reliable alignment across thousands of cycles, extending the lifespan of connected parts such as link rods, cylinders, and main frame joints.
Final Inspection & Quality Control
Before shipping, each EX300 H-link is subjected to strict quality assurance protocols. Coordinate measuring machines (CMM) confirm geometric accuracy, while go/no-go gauges test pinhole dimensions. Ultrasonic flaw detection is performed on high-stress zones to eliminate internal voids or defects caused during forging.
Surface coating thickness and adhesion are also inspected to ensure corrosion protection will hold up in real-world conditions.
Maintenance Tips for Longevity
Proper care can significantly extend the lifespan of your H-link assembly:
- Apply grease to all pin joints at regular intervals
- Conduct visual inspections for cracking or surface deformation after 1,000 hours of operation
- Replace pins and bushings together with the H-link if signs of elongation or metal fatigue are detected
- Avoid excessive side-load operation that causes off-center joint stress
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.
