Excavators Arm Linkage Link Rod Used on Hitachi EX120
Heavy-duty link rod engineered for Hitachi EX120 excavators, built from high-strength forged structural steel. CNC-machined for precise pin fitment and balanced force transfer, with corrosion-resistant coating for extended service life. Ensures smooth bucket articulation and reliable performance in demanding excavation and trenching environments.
| 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 the Link Rod Does in EX120
In the Hitachi EX120, the link rod serves as a central structural connector between the bucket and the bucket cylinder, transferring force to control digging, lifting, and tilting actions. It acts as both a load-bearing member and a motion stabilizer, especially when operating in confined spaces or working along trench walls.
Given the EX120's high usage frequency in municipal construction, rural infrastructure, and foundation trenching, the link rod must reliably withstand cyclic loading, sudden shocks, and abrasive site conditions. When this part wears down or warps, it not only affects bucket control but can also cause excessive wear to the hydraulic cylinder and arm pivot.
Material Strength and Structural Integrity
This link rod is manufactured using Q345B or Q235B structural steel, both of which offer excellent mechanical strength and impact resistance. Q345B is especially suited for more demanding applications with higher stress exposure, while Q235B provides stable performance at a more economical cost.
The steel is formed through closed-die forging, which enhances the material’s grain flow and structural uniformity, reducing the risk of internal voids or sudden fracture under bending force. This forged construction gives the EX120 link rod the necessary toughness to endure years of operation in rough conditions.
After forging, the link rod undergoes high-precision CNC machining, especially at the pin holes and contact surfaces. These areas are vital for accurate assembly and smooth articulation with the bucket and arm.
To protect against rust, moisture, and corrosive substances found on work sites, the finished part is shot-blasted and treated with either a primer coat or electrophoretic coating (e-coating), offering long-lasting surface protection.
Pre-Machining Storage
After forging and rough shaping, each link rod is properly stored in preparation for precision machining and heat treatment. These solid, semi-finished parts are neatly arranged in batches — showcasing both our forging strength and our ability to manage stable, large-scale production.
Export-Ready Packaging
After completing all machining, quality checks, and anti-corrosion treatment, each finished link rod is carefully packed using reinforced pallets or wooden crates. This ensures safe handling and long-distance transport. Every package is clearly labeled for easy tracking, and logo or barcode customization is available upon request.
Compatible Models
This link rod is fully compatible with Hitachi EX120 series excavators and its direct variants, including:
EX120 / EX120-1 / EX120-3 / EX120-5 / EX120LC/ZX120 series
Not sure of your model or part number? Send us your machine 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.
Designed for Real Job Site Demands
The EX120 is a versatile mid-size excavator used in both urban construction and light civil engineering. These applications often involve repetitive motion, side-load forces, and fast directional changes. The link rod must remain rigid and precisely aligned throughout the full range of motion—even under uneven terrain or when lifting obliquely. Its resistance to bending, twisting, and pin elongation makes it a reliable upgrade or replacement part for owners seeking long service life and fewer maintenance intervals.
Maintenance Tips for Optimal Performance
To extend the life of your EX120 link rod and reduce wear on related components:
- Grease pin joints regularly to prevent dry metal contact
- Inspect the rod for signs of bending or elongation after every 800–1,000 hours
- Always replace pins and bushings when installing a new rod
- Avoid overloading the bucket or using it to pry against large objects
Proper maintenance ensures smoother operation, better fuel efficiency, and reduced machine downtime.
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.
