As a factory-direct manufacturer, we deliver full OEM services with consistent quality, competitive pricing, and reliable global logistics.
Our high-wear-resistant undercarriage parts minimize premature failure and unplanned downtime, solving frequent breakage issues in abrasive conditions.
With over 20 years of specialized manufacturing, we hold ISO9001 and SGS certifications, proving consistent quality and engineering reliability.
We use 35MnB alloy steel and deep medium-frequency quenching to achieve HRC 52–58 surface hardness, ensuring superior wear performance.
Why Our Undercarriage Parts Stand Up
- Global Brand Compatibility: Our parts are engineered to exact Komatsu OEM specifications, fitting PC200, PC300, D20, D31, and many other models without modification.
- Premium 35MnB Material: Track rollers, idlers, and sprockets are forged from 35MnB steel, delivering high tensile strength and exceptional wear resistance.
- Deep Quenching/Heat Treatment: Medium-frequency deep quenching creates a hardened case up to 10 mm deep, achieving surface hardness of HRC 52–58 for extended life.
- ISO9001/SGS Certified: Produced under ISO9001:2015 quality systems and verified by SGS, ensuring every batch meets rigorous international standards.
Our catalog of Komatsu excavator undercarriage parts includes various specifications, fully compatible with Komatsu excavators and bulldozers from PC60 to PC800 and D20 to D375.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB alloy steel (forged/cast) |
| Surface Hardness | HRC 52–58 (roller shell, idler tread, sprocket teeth) |
| Core Hardness | HRC 30–36 |
| Hardened Case Depth | 6–10 mm |
| Heat Treatment Process | Medium-frequency deep quenching + tempering |
| Certification | ISO9001:2015, SGS material reports |
| Warranty | 12 months or 2,000 working hours |
OEM & Customization
We match original Komatsu drawings, custom dimensions, and strict OEM standards for precise fit and long service life.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavators | Komatsu | PC60-7, PC120-6, PC200-7/8, PC220-7, PC300-7/8, PC400-5/7, PC450-7, PC600-8, PC800-8 |
| Bulldozers | Komatsu | D20A/P, D31E/EX/P, D37E/EX, D41E/P, D65E/EX/P, D85, D155, D275, D375 |
Delivery & Logistics
We offer factory-direct pricing, flexible MOQ, and reliable sea/air freight to US ports, ensuring on-time delivery.
Engineering That Outlasts
Floating seals in our track rollers create a permanent lubrication chamber, preventing dirt ingress and extending service intervals dramatically.
35MnB steel with controlled deep quenching yields a hardened case depth of 6–10 mm, resisting surface wear and impact fatigue under maximum load.
Precision-machined idler brackets and sprocket teeth ensure exact pitch alignment, reducing track chain stretch and link breakage on rugged terrain.
Demanding Environments Where Our Parts Excel
- Mining
- Quarrying
- Heavy Road Construction
- Forestry
- Demolition
- Landfill & Waste Handling
Frequently Asked Questions
- What is your minimum order quantity (MOQ)?
- Our standard MOQ is 4 pieces per part number, but we can accommodate trial orders for new clients.
- How deep is the heat treatment hardening layer?
- Track roller shells achieve a hardened depth of 6–10 mm after medium-frequency quenching, ensuring long wear life.
- Can you match OEM part numbers?
- Yes, we produce parts to original Komatsu part numbers; please provide the number for a quotation.
- What warranty do you offer?
- All undercarriage parts carry a 12-month or 2,000-hour warranty against manufacturing defects.
- Do you provide material certificates?
- We supply 35MnB mill test reports and SGS inspection certificates upon request.
- How long is the delivery time?
- Standard parts ship within 15–20 days; custom orders take 25–30 days after drawing confirmation.
- Are your parts compatible with grey-market Komatsu excavators?
- Absolutely, we manufacture components for both official and parallel-import Komatsu models.
- Can you provide sample parts for testing?
- Free samples of standard rollers or idlers can be sent for evaluation; freight is at your cost.
- What payment terms do you accept?
- We accept T/T (30% advance, 70% before shipment) or L/C for larger orders.
- How do I confirm part compatibility?
- Send us the machine model and serial number, and we will verify the correct part number from our database.
Quick Maintenance Guide for Komatsu Undercarriage Parts
- Inspect rollers daily for oil leaks and flange wear; replace when flange thickness falls below 50% of original.
- Maintain correct track tension—over-tightening causes excessive pin and bushing wear and increases fuel consumption.
- Replace sprockets when tooth wear exceeds 25% to prevent accelerated wear on new track chains and rollers.
- Grease idler bearings per Komatsu schedule using lithium EP2 grease to withstand high impact loads and contamination.