Top Carrier Roller for Doosan DH300 Excavator
This upper carrier roller is designed for the Doosan DH300 excavator to provide robust support to the upper portion of the track chain. Built with precision-forged steel and advanced heat treatment, it delivers reliable performance even under the extreme conditions of mining, road construction, and heavy 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.
Why the Carrier Roller Matters in DH300 Undercarriage Systems
The carrier roller in a DH300 excavator supports the top part of the track, guiding its path and preventing slack. Unlike the bottom rollers that carry the machine's full weight, the upper roller ensures smooth track operation, reduces lateral swing, and protects other undercarriage parts from misalignment and premature wear. In a powerful model like DH300, which often operates in harsh terrain and under high torque, the stability provided by a strong upper roller is essential for long-term performance.
Premium Material & Construction for Longer Service Life
Premium Materials
Roller Body: High-strength alloy steel (50Mn, 40Mn2), forged and quenched for superior toughness.
Shaft: Precision-machined 40Cr steel, surface-hardened to HRC52–58 for excellent wear resistance.
Seals: High-quality floating seals with anti-dust rings to prevent oil leakage and extend service life.
These construction standards ensure high durability, resistance to surface cracking, and minimal maintenance during the roller’s life cycle.
Manufacturing Process
The manufacturing process follows a strict quality workflow, supported by both automated and manual inspections:
Heat Treatment
Machining Process
CNC turning and milling ensure dimensional accuracy
Packing
OEM Undercarriage Parts for Doosan
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| DOOSAN | DH30 | DH35 | DH50 | DH55 | DH60 | DH60-7 | DH80 | DH130 |
| DH130-2 | DH150LC-7 | DH150W-7 | DH170 | DH180 | DH200W | DH210W-7 | DH220LC | |
| DH225LC | DH280LC | DH300LC-7 | DH320 | DH450 | DX60 | DX80 | DX225LC | |
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
OEM Compatibility and Mounting Specifications
This carrier roller is fully compatible with Doosan DH300 crawler excavators and conforms to OEM reference standards . The roller features proper mounting hole positioning, shaft size, and bushing tolerances for direct replacement without modification. Customization with logo engraving or specific measurements is also available for OEM clients
Application Scenarios – Designed for Demanding Job Sites
The DH300 carrier roller is suitable for a wide range of heavy-duty applications, including:
- Mining operations
- Large-scale earthmoving
- Roadbed and foundation construction
- River and slope reinforcement projects
By supporting the track's upper section and reducing oscillation, the roller helps stabilize the whole undercarriage system, especially in complex and sloped terrains.
Maintenance Tips for Long-Term Performance
Although carrier rollers endure less abrasion than bottom rollers, they still need periodic inspection. To extend their working life:
- Clean the roller area regularly to avoid debris buildup
- Monitor for grease leaks and abnormal noises
- Rotate the roller manually to check for resistance
- Replace rollers in pairs for balance when necessary
These steps will ensure stable performance of your Doosan DH300 excavator on all terrains.
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.
