Mini Excavator PC20-3 Track Bottom Roller fit Komatsu Undercarriage Parts
The Komatsu PC20-3 track roller is a high-strength undercarriage component engineered to support the excavator’s track system with stability and precision. Manufactured with premium alloy steel, advanced heat treatment, and reliable sealing, it ensures long-lasting durability, reduced maintenance, and smooth operation in diverse 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 track roller, often called the bottom roller, is a fundamental part of the Komatsu PC20-3 excavator undercarriage. Its primary role is to carry the machine’s weight and guide the track chain as the excavator moves. By maintaining continuous contact between the track links and the ground, the roller helps distribute loads evenly and reduces wear across the entire track system. A high-quality roller is essential for ensuring machine stability, minimizing vibration, and extending the service life of both tracks and other undercarriage components.
Material and Construction
To withstand the heavy-duty demands of earthmoving operations, the PC20-3 track roller is produced from high-grade alloy steel. The body of the roller undergoes precision forging and CNC machining, ensuring strength and dimensional accuracy. Key components such as shafts and bushings are crafted from hardened steel, while the roller surface is subjected to deep induction hardening, achieving a hardness of HRC 52–58. This combination of a tough outer surface and a resilient core provides excellent resistance against abrasion, cracking, and impact loads, even under severe conditions like rocky or muddy terrains.
Manufacturing Process
The PC20-3 track roller is manufactured under a strict production workflow designed to ensure durability and consistency:
Heat Treatment
The track roller undergoes a controlled heat treatment process to enhance the hardness and toughness of the steel. This step ensures that the roller surface achieves the ideal balance between wear resistance and impact strength. With precise temperature control and quenching methods, the roller achieves a hardness of HRC 52–58, allowing it to withstand harsh working conditions such as rocky terrain and heavy excavation tasks.
Machining Process
After heat treatment, the roller body enters the precision machining stage. Using CNC lathes and grinding equipment, each roller is processed to meet exact dimensional tolerances. This guarantees a perfect fit with the shaft and sealing components. Machining also ensures smooth surface finishes, which reduce friction during operation and contribute to longer service life.
Assembly
During assembly, the roller shell, shaft, bushings, and seals are carefully fitted together. The use of high-quality seals prevents oil leakage and protects the roller from dust, mud, and water intrusion. Strict assembly procedures ensure that each component works harmoniously, resulting in a roller that operates smoothly and consistently in tough working environments.
Running Test
Before leaving the production line, each track roller undergoes a dynamic running test. This test simulates real working conditions by rotating the roller under load, checking for abnormal noise, resistance, or vibration. It ensures the roller is well-lubricated, properly sealed, and capable of delivering reliable performance once installed on the excavator.
Paint Spraying
Once the mechanical testing is complete, the roller is coated with anti-rust primer and durable paint. This not only gives the roller a clean and professional finish but also protects it against corrosion and harsh weather exposure. The paint coating extends the service life of the roller, especially in humid or muddy working environments.
Packing
The final step is secure packing to ensure safe transportation. Rollers are individually wrapped or palletized in wooden crates, with protective layers to prevent scratches or rust during long-distance shipping. Each package is clearly labeled with product information, making it easier for customers to identify and install the correct part.
Quality Assurance
All Komatsu PC20-3 track rollers are tested against OEM specifications to ensure proper fit and function. Quality checks include dimensional inspection, hardness testing, sealing verification, and load-bearing trials. Only rollers that meet these strict standards are approved for delivery. This ensures that end-users receive components with stable performance and reliable service life.
Compatibility & OEM Fitment
This track roller is designed for Komatsu PC20-3 mini excavators but is also compatible with similar small and mid-size Komatsu machines. Fitment includes:
- Komatsu PC20 / PC20-3
- Komatsu PC15 models with similar undercarriage specifications
- Komatsu PC25 compact excavators
OEM Reference Numbers: Available upon request. Customers may confirm compatibility with part codes or casting numbers before placing an order.
| 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 | |||||
Application Scenarios
The PC20-3 track roller is suitable for a wide range of working environments:
- Construction sites – Provides stability on soil, gravel, and sand.
- Landscaping projects – Ensures smooth track movement when maneuvering in confined spaces.
- Roadwork & trenching – Withstands frequent short-distance travel and load shifts.
- Muddy & wet conditions – Sealed design keeps mud, water, and debris out of internal components.
- Its durability makes it a cost-effective choice for contractors who require reliable performance in varied and often challenging job sites.
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.
