Excavator Bottom Track Roller Undercarriage Parts fit Komatsu PC300-6
Heavy-duty track roller for Komatsu PC300-6 excavators. Manufactured with high-strength steel and precision engineering to ensure long wear life, stable operation, and OEM compatibility.
| 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 PC300-6 track roller—also known as Komatsu PC300-6 bottom roller—is a critical component of the excavator undercarriage system. It supports the full weight of the machine while maintaining continuous contact between the track chain and the ground, making it an essential part of excavator undercarriage parts for stable operation. This component plays a crucial role in stabilizing movement, especially during complex construction tasks and when operating on rough or uneven terrain, where reliable track roller for Komatsu PC300-6 performance is required.
A properly functioning track roller reduces vibration, minimizes stress on other undercarriage components, and helps prevent premature wear. By choosing a high-quality excavator track roller PC300-6, operators can significantly improve machine efficiency, extend service life, and reduce maintenance costs over time.
Track Roller Materials Used and Manufacturing Craftsmanship
The PC300-6 track roller is built using high-quality alloy steels such as 50Mn or 40MnB, known for their wear resistance and structural strength. Each roller undergoes precision forging, followed by advanced quenching to create a hard-wearing outer layer and a durable core.
CNC machining ensures dimensional precision and sealing performance, while a strict surface treatment process adds corrosion resistance. This multi-step process ensures the roller withstands heavy loads and harsh working environments for an extended operational life.
Track Roller Manufacturing Process
To ensure consistency and performance, each Komatsu PC300-6 track roller undergoes a step-by-step manufacturing process: standards. This ensures dependable performance in high-load excavation environments.
Heat Treatment
Heat treatment is a critical step that directly determines the hardness and service life of the track roller. The roller shell is subjected to quenching and tempering processes to achieve an optimal balance between surface hardness and internal toughness.
Through this process, the surface hardness typically reaches HRC52–58, providing excellent resistance to abrasion, while maintaining a strong core structure to prevent cracking under heavy loads.
Machining Process
After heat treatment, the components undergo precision machining. CNC machines are used to control key dimensions such as the bore diameter, sealing grooves, and shaft fitting areas.
This step ensures tight tolerances and smooth surface finishes, which are essential for proper seal installation and bearing alignment, ultimately improving the roller’s operational stability and lifespan.
Assembly
During assembly, all internal components—including shafts, bushings, seals, and floating seal groups—are carefully installed.
Special attention is given to the sealing system to ensure proper compression and alignment, preventing oil leakage and contamination ingress. Each unit is assembled under strict quality control standards to guarantee consistency.
Running Test
Every assembled track roller undergoes a running test before leaving the factory. This simulation process checks rotation smoothness, sealing performance, and abnormal noise.
It ensures that the roller operates reliably under simulated working conditions and meets OEM-level performance requirements.
Paint Spraying
Once the product passes inspection, it proceeds to surface treatment. Anti-rust primer and high-quality topcoat are applied to protect the roller from corrosion and environmental damage.
The coating also improves the product’s appearance and provides an additional layer of durability during storage and transportation.
Packing
Finally, the finished track rollers are carefully packed to prevent damage during shipping. Depending on customer requirements, packaging may include wooden pallets, crates, or customized solutions.
Proper labeling and protective measures are applied to ensure safe delivery and easy identification upon arrival.
OEM Undercarriage Parts for Komatsu
We also sell spare parts for the following Komatsu excavator models.
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| KOMATSU-PC | PC20 | PC30-5 | PC30-6 | PC30-7 | PC30-8 | PC35 | PC40 | PC45 |
| PC50 | PC55 | PC40-5 | PC40-6 | PC40-7 | PC50 | PC55 | PC60-1 | |
| PC60-3 | PC60-5 | PC60-6 | PC60-7 | PC75 | PC100-1 | PC100-3 | PC100-5 | |
| PC100-6 | PC100-7 | PC120-3 | PC120-5 | PC120-6 | PC120-7 | PC150 | PC200-1 | |
| PC200-3 | PC200-5 | PC200-6 | PC200-7 | PC200-8 | PC220-1 | PC220-3 | PC220-5 | |
| PC220-6 | PC220-7 | PC220-8 | PC200LC-3 | PC200LC-5 | PC200LC-6 | PC200LC-7 | PC200LC-8 | |
| PC240 | PC300-1 | PC300-5 | PC300-6 | PC300-7 | PC300LC | PC300LC-5 | PC300LC-6 | |
| PC300LC-7 | PC360-5 | PC360-6 | PC360-7 | PC360LC-5 | PC360LC-6 | PC360LC-7 | PC360LC-8 | |
| PC400-1 | PC400-3 | PC400-5 | PC400-6 | PC400-7 | PC400LC-1 | PC400LC-3 | PC400LC-5 | |
| PC400LC-6 | PC400LC-7 | PC450-5 | PC450-6 | PC450-7 | PC450LC-5 | PC450LC-6 | PC450LC-7 | |
| PC650 | PC750 | PC800 | PC350 | |||||
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Komatsu PC300-6 Undercarriage Compatibility
This heavy-duty track roller is designed specifically for Komatsu PC300-6 excavators, delivering reliable performance across demanding terrain. It supports both standard and export configurations and is ideal for equipment rebuilds or OEM replacement projects.
OEM Reference Numbers
PC300 Class : 207-30-07300
PC300-7 : 207-30-00651
Compatibility Highlights:
- Fits Komatsu PC300-6 and compatible variants
- Fully interchangeable with original undercarriage components
- Designed for global construction and mining environments
- Custom sizes and sealing options available
Whether you're replacing a single roller or outfitting an entire fleet, this component ensures reliable fitment, long service life, and smooth undercarriage operation.
Maintenance Tips
- Regularly check for oil leakage and replace worn seals promptly
- Maintain proper track tension to reduce roller and chain wear
- Clean the undercarriage regularly to avoid premature corrosion or jamming
- Replace rollers in pairs to ensure balanced track movement
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.
