Excavators Heavy-Duty Track Chain for Hitachi EX120 Undercarriage
Our EX120 track chain is engineered to handle the wear and tear of intense excavation work. Made from high-grade forged steel, heat-treated for hardness, and assembled with precise pin and bushing tolerances, this chain ensures smooth operation and consistent track tension across a variety of terrains.
| Material | 35MnB/40Mn2 |
|---|---|
| Surface Hardness | HRC53-58 |
| Colors | Black or yellow or customized |
Quick Quote Request
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 track chain (also known as track link assembly) serves as the foundation of the EX120 excavator's entire undercarriage system. It connects directly with the track shoes, sprockets, idler wheels, and bottom/top rollers, forming a continuous loop that allows the machine to travel over uneven and demanding terrain.
More than just a structural component, the track chain is responsible for:
- Transmitting power from the drive sprocket to the ground, converting engine torque into smooth movement.
- Maintaining consistent track tension, preventing derailment or premature wear during sharp turns or steep climbs.
- Stabilizing the machine during digging or lifting, distributing the weight across the entire undercarriage evenly.
- Reducing vibration and impact, thereby protecting other undercarriage parts and improving operator comfort.
A well-engineered and properly maintained track chain helps your EX120 perform reliably in harsh environments—whether you're trenching in soft soil, grading on slopes, or operating in compact urban job sites.
Manufacturing Process & Material Highlights
Our EX120 chains undergo a multi-stage production process to ensure optimal strength and longevity:
- Forged Links: Manufactured from 35Mn or 40Mn2 alloy steel for superior toughness and crack resistance.
- Heat-Treated Pins & Bushings: Hardened to HRC 55±2 to resist abrasion and rotational wear.
- CNC Machining: Tight dimensional control ensures smooth pin insertion and minimal clearance.
- Preload Assembly: Every chain is tensioned under simulated operating stress to prevent loosening.
- Anti-Rust Coating: Surface treated with paint or black oxide to resist rust during storage and use.
We provide real photos and inspection videos before delivery so you can verify the quality and accuracy of your order.
Manufacturing Process & Surface Treatment
We follow a multi-step process to ensure the reliability of each track chain:
- Forging & Heat Treatment – Ensures high structural strength and surface hardness.
- CNC Precision Machining – Guarantees accurate pitch and smooth pin-bushing assembly.
- Assembly & Press Fitting – Ensures tight tolerances to avoid premature play.
- Rust Protection – Surface treated with black oxide or paint coating to protect against corrosion.
Flow Chart
To help you visualize the chain quality, we support real product media including:
Track Link Forging & Machining
The raw track links are forged into form, then machined to ensure uniform pitch and hole alignment. Precision is essential for proper sprocket and bushing engagement.
Pin and Bushing
Hardened pins are inserted between the links to create a flexible, load-bearing chain. The sealing system prevents grease leakage and contaminant ingress.
Painting & Surface Coating
After assembly, the entire chain is cleaned and painted with industrial-grade coatings to protect against rust, humidity, and chemical corrosion on job sites.
Final Inspection & Packaging
Before shipping, the chains undergo dimensional checks and torque verification. Chains are then packed securely on wooden pallets or steel frames to avoid deformation.
Pre-Shipment Inspection Support
We provide pre-delivery photos and videos of your actual product so you can:
- Confirm part dimensions and appearance
- Check surface coating and packaging method
- Ensure peace of mind before shipment leaves our factory
Our team will work with you to make sure your order matches exactly what your project requires.
Compatible Models & Fitment Guidance
The EX120 track chain fits:
- Hitachi EX120 / EX120-1 / EX120-2 / EX120-3 / EX120-5
Compatible with similar machines using 154mm or 171mm pitch (confirm before purchase)
Common OEM Part Numbers (for reference):
- 9093366, 9064734, 9064735, 9064791
If you are unsure, send us your machine's model and serial number—we’ll help confirm fitment.
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.
Why Choose Our EX120 Excavator Track Chain?
- Precision Fit – Fully matches EX120 undercarriage dimensions for hassle-free installation
- Long Wear Life – Forged and hardened for extreme durability
- Customizable Options – Choose from different pitches, bushing styles, or greased vs. dry chain
- OEM/ODM Branding – Custom logo engraving and packaging for bulk orders
- Fast Shipping – Popular models like EX120 are always in stock
- Pre-Shipment Inspection – Photo and video reports available upon request
Maintenance Recommendations
- Maintain proper track tension—avoid both overtightening and excessive slack
- Monitor sprocket wear and replace as needed to prevent misalignment
- Clean the chain regularly in muddy or sandy conditions to prevent abrasive buildup
- Greased or sealed chains can be requested based on jobsite demands
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.
Quick Quote Request
Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
