Excavator Undercarriage Parts Bottom Roller fit Hitachi EX300, ZX330, ZX350
Heavy-duty bottom roller built for Hitachi EX300, ZX330, and ZX350 series excavators. Precision-forged and heat-treated for high load-bearing capacity, stable track guidance, and long wear life under harsh working conditions like mining and deep excavation.
| Material | 50Mn/40MnB |
|---|---|
| Surface Hardness | HRC53-58,deepth: 8-12mm |
| Colors | Black or yellow or customized |
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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.
Product Function of Bottom Roller fit Hitachi EX300 / ZX330 / ZX350
This bottom roller supports the weight of the excavator while ensuring smooth and stable track movement. It guides the track chains and maintains proper track tension, which is critical for efficient operation and minimizing undercarriage wear. Engineered for heavy-duty use, it withstands high impact loads and harsh terrain conditions.
Materials and Heat Treatment Process for Hitachi Track Roller
Manufactured from high-grade 42CrMo alloy steel, the roller undergoes advanced forging and heat treatment processes. Surface hardening reaches HRC 52-58, providing superior abrasion resistance and durability. The bushings and shaft are also heat treated to maintain strength and load capacity.
Precision machining is performed using CNC equipment to achieve exact tolerances, resulting in secure sealing performance and flawless rotation. The robust construction guarantees that the roller can handle continuous operation in demanding environments without structural compromise.
How We Manufacture Track Roller
Our facility is equipped with automated quality checkpoints and sealing systems to guarantee durability, leak resistance, and long-term operational stability. Whether in high-impact environments or continuous-duty applications, the rollers we manufacture for Hitachi machines are built to last.
Heat Treatment
The roller body and shaft undergo high-frequency quenching and tempering to achieve a surface hardness of HRC 52–58, enhancing wear resistance and fatigue strength for long-term use in rough terrains.
Machining Process
CNC machining ensures precision on all critical surfaces, including shaft ends, bore diameters, and seal housings. This guarantees a perfect fit, concentric rotation, and smooth installation onto the undercarriage.
Assembly
All components—including shaft, seals, bushings, and O-rings—are assembled in a dust-free environment to prevent contamination and ensure optimal sealing performance under pressure and vibration.
Running Test
Each roller is subjected to a dynamic rotation test to verify concentricity, smoothness, and internal lubrication flow. Any noise, resistance, or oil leakage is checked and corrected before approval.
Paint Spraying
The surface is coated with anti-corrosion industrial paint, often in black or yellow, to protect the roller from rust and harsh environmental exposure during storage and field use.
Packing
Finished rollers are wrapped in anti-rust film and packed into pallets or fumigated wooden crates. Each package is labeled with model, size, and quantity for easy handling and identification.
OEM Undercarriage Parts for Hitachi
| 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.
Quality Assurance
Every PC200-6 track roller goes through rigorous inspection throughout the production cycle. We check dimensional tolerances, sealing performance, surface hardness, and dynamic stability to guarantee optimal performance. Our in-house testing systems include dynamic fatigue tests, oil sealing tests, and load-bearing assessments to ensure the product can endure real-world working conditions.
Compatible Hitachi Excavator Models
This bottom roller fits a wide range of excavator models, including but not limited to:
Hitachi EX270, EX280, EX300, EX310, EX330
Hitachi ZX270, ZX280, ZX330, ZX350
Other similar size excavators requiring the same bottom roller
This ensures flexibility and ease of replacement for excavators within this size and specification range.
Quality Control and Testing
Each roller is rigorously inspected for dimensional accuracy, hardness, and surface integrity. Our stringent QC ensures that all units meet or exceed OEM standards for strength, durability, and performance under tough operating conditions.
Maintenance Tips
- Regularly inspect for oil leaks and wear
- Replace rollers in pairs to ensure balanced wear
- Keep track chain tension within recommended range
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.
