Heavy-Duty Carrier Roller Excavator Upper Roller Used on Hitachi ZX330
Premium Hitachi ZX330 Carrier roller and compatible models. Reinforced structure, precise machining, and wear-resistant materials ensure long service life and optimal track guidance under extreme working conditions.
| 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.
The carrier roller (also known as the upper roller) is mounted on the top frame of the undercarriage and supports the upper section of the track chain, guiding the track and maintaining tension during machine operation. Unlike the bottom track rollers that bear the machine’s weight, the carrier roller prevents sagging and misalignment of the track.
In powerful machines like the Hitachi ZX330, with their large size and long track frames, upper rollers are especially important for reducing vibration, improving machine stability, and extending the lifespan of the entire undercarriage system.
Compatibility with Hitachi ZX330 and Related Models
Our ZX330 carrier rollers are manufactured according to OEM specifications and tested to ensure accurate fitting and consistent performance. This model is compatible with:
Hitachi ZX330 / ZX330-3 / ZX330-5G
Also applicable to ZX350 series (in some configurations)
Confirm dimensions before ordering to ensure perfect fit.
High-Strength Materials & Precision Manufacturing
High-Strength Materials & Precision Manufacturing
- Roller Shell: Forged from alloy steel (50Mn or 40Mn2), delivering superior toughness and resistance to deformation.
- Central Shaft: Induction-hardened 40Cr or 45# steel, offering surface hardness of HRC52–58.
- Sealing System: Fitted with floating seals and heat-resistant O-rings to prevent grease leakage and contamination.
Precision Process Flow
Our production process combines automated CNC turning with strict quality checks to ensure every roller maintains correct concentricity and mounting fit:
Forging → CNC Machining → Induction Hardening
Seal Assembly → Final Testing → Anti-Rust Coating → Packaging
This ensures smooth operation, low noise, and high endurance — even under high-speed travel or in abrasive terrains.
Heat Treatment
Machining Process
CNC turning and milling ensure dimensional accuracy
Packing
Secure wooden crate packaging for safe delivery
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.
Benefits of Using Premium Carrier Rollers on ZX330
Our ZX330 upper rollers offer multiple advantages that contribute to overall machine efficiency:
- Maintain proper track tension and reduce sag
- Improve operator comfort by reducing vibration
- Decrease wear on sprockets, idlers, and track chains
- Minimize downtime with extended service intervals
- Perfect replacement for OEM parts with competitive pricing
These rollers are especially valuable in high-load and long-duration operations like quarrying and heavy earthmoving.
Ideal Working Conditions for ZX330 Carrier Rollers
These carrier rollers are designed to perform in challenging and diverse work environments, including:
- Mining and Quarrying Sites
- Road and Dam Construction
- Urban Demolition Projects
- Pipeline and Foundation Excavation
Built for harsh weather, dust, water, and shock resistance, they ensure continuous operation with minimal undercarriage stress.
Maintenance Guidelines for Long-Term Performance
Maintaining your ZX330 carrier roller properly will maximize its lifespan and operational value:
- Remove debris from the upper track area daily
- Check roller rotation and grease levels during routine inspections
- Replace immediately if wobbling or seal leakage is detected
- Follow OEM greasing schedules for optimal sealing
A well-maintained carrier roller reduces strain on the entire undercarriage system.
Frequently Asked Questions (FAQ)
Can this roller be used on ZX350 models?
Some configurations of ZX350 use the same dimensions, but it’s best to verify part numbers and mounting specs to ensure compatibility.
What’s the difference between carrier roller and bottom roller?
The carrier roller supports the upper track, while the bottom roller (track roller) supports the machine weight. Both are essential but serve different purposes.
Do you offer OEM branding or customized packaging?
Yes. We support OEM branding, laser marking, and customized packaging for bulk orders.
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.
