Compact Excavator Undercarriage Parts Carrier Roller for Hitachi EX55
This upper carrier roller is specially built for the Hitachi EX55 mini excavator. Though compact in size, it plays a critical role in guiding the track, reducing sag, and ensuring smooth operation in tight construction environments. Precision-built, it meets OEM standards and performs reliably under frequent directional shifts and vibrations.
| 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.
What Does the Carrier Roller Do on a Hitachi EX55?
On a compact excavator like the EX55, the carrier roller (also known as the upper roller) is mounted on the top of the undercarriage frame. Its purpose is to:
- Support the upper section of the track chain
- Prevent track sagging, especially during forward and reverse travel
- Improve alignment and reduce vibration
- Extend track and undercarriage life
While the bottom track rollers carry the weight, the upper rollers like this one maintain track shape and stability — especially vital for mini excavators that operate in confined or rough terrain.
Suitable for Hitachi EX55 and Related Models
This carrier roller is designed for full compatibility with the following:
Hitachi EX55 / EX55UR / EX55-2 / EX55-3
In some cases, compatible with ZX55UR series (please confirm specs)
We can assist with matching if you provide machine serial number or original part dimensions.
Compact but Durable – Materials & Craftsmanship
Strong Materials, Optimized for Mini Machines
Despite its smaller profile, this carrier roller uses high-grade components:
- Body: Forged 50Mn or 40Mn steel
- Shaft: 40Cr with heat-treated surface (HRC 52–58)
- Sealing: High-performance floating seal + dust rings
- Grease Chamber: Fully enclosed to prevent contamination
These materials ensure durability in high-vibration environments like urban trenching and landscaping.
Factory-Controlled Production
We use CNC machining, strict heat-treatment processes, and 100% inspection protocols to ensure every carrier roller is balanced, durable, and leak-free.
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.
Why Choose Our EX55 Carrier Roller?
Our carrier roller offers the following key advantages:
- OEM-compliant structure for direct replacement
- Smooth rotation with reduced resistance
- Perfect for high-cycle jobs in compact areas
- Anti-rust painted finish for outdoor environments
- Supports customization for branding or coating color
Compared to aftermarket options, our product ensures better internal sealing and concentricity — critical for long-term performance on mini excavators.
Maintenance Tips to Extend the Service Life of Upper Rollers
To prolong the service life of your upper roller:
- Keep it free from excess mud or debris buildup
- Check for grease leaks or irregular rotation
- Replace seals if any wear or oil film is visible
- Grease during scheduled maintenance cycles
Even in mini excavators, failure of upper rollers can lead to uneven track wear and reduced job site efficiency.
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.
