Kobelco excavator undercarriage parts form the mobile base, distributing machine weight and enabling stable travel over rugged terrain. Track rollers, idlers, sprockets and chains work together.
As a factory-direct manufacturer, we supply complete OEM undercarriage solutions without intermediaries. This ensures direct engineering support and consistent quality from raw material to finished component.
Precision-forged rollers and induction-hardened links resist premature wear and catastrophic breakage. Our components eliminate unscheduled downtime caused by inferior aftermarket parts that fail under high-impact loads.
With over 20 years of specialized manufacturing, Dingtai holds ISO9001:2015 and SGS certifications. Every shipment reflects our commitment to repeatable quality and heavy-duty reliability.
We utilize premium 35MnB alloy steel, processed through deep quenching and tempering. This yields a wear-resistant case and a tough core that withstands constant shock loading in demanding conditions.
Core Selling Points
- 20+ Years Experience – Two decades of undercarriage engineering guarantee dimensionally accurate parts that match OEM specifications and deliver consistent field performance.
- Premium 35MnB Material – High-strength 35MnB alloy steel provides exceptional hardenability and impact toughness, significantly extending service life over standard carbon steels.
- Deep Quenching/Heat Treatment – Through-hardening to HRC 48‑55 with a hardened layer depth of ≥8 mm ensures maximum wear resistance and structural integrity under heavy loads.
- 100% QC Inspection – Every component undergoes dimensional, hardness and ultrasonic testing before dispatch, eliminating latent defects and ensuring zero field failures.
Our catalog of Kobelco Excavator undercarriage parts includes various specifications, fully compatible with Kobelco excavators and crawler dozers.
Why Choose Dingtai for Kobelco Excavator Undercarriage Parts?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40Mn2 alloy steel |
| Hardness (Roller/Idler) | HRC 48‑55 (tread & flange) |
| Heat Treatment | Deep induction quenching & tempering |
| Process | Hot forging, CNC machining, friction welding |
| Certification | ISO9001:2015, SGS material report |
| Warranty | 12 months or 2,000 working hours |
2. OEM & Customization
We match original drawings or samples precisely, fabricating custom dimensions, bolt patterns and seal interfaces. Strict adherence to OEM standards guarantees perfect fit and interchangeable assembly.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Excavator (Mini) | Kobelco | SK55SR, SK75SR, SK135SR |
| Crawler Excavator (Medium) | Kobelco | SK200‑8, SK210LC‑9, SK250‑8, SK260 |
| Crawler Excavator (Large) | Kobelco | SK350LC‑9, SK480‑8, SK850LC |
| Crawler Dozer | Kobelco | D50, D75, D155 series |
4. Delivery & Logistics
Factory-direct pricing and flexible MOQ (one set per model) reduce inventory cost. We ship via reliable sea/air freight with full export packing and real-time container tracking.
Technical Features
Track rollers incorporate double-cone floating seals that prevent oil leakage and block abrasive dust entry. This sealed lubrication system extends bearing life dramatically.
Idlers feature forged rims and induction-hardened treads to resist deformation and pitting under extreme side loads. The hub design ensures perfect alignment during reversing.
Sprockets are CNC-machined after heat-treatment to achieve exact tooth profile, reducing chain peak loads and maintaining smooth engagement even after extensive wear accumulation.
Applications
- Heavy earthmoving and mining extraction
- Road and highway construction
- Quarrying and aggregate processing
- Demolition and site clearance
- Forestry and land reclamation
- Pipeline and utility trenching
Frequently Asked Questions
Q: What’s the MOQ for Kobelco undercarriage parts?
A: One full set per model or individual components. We support trial orders and mixed containers.
Q: How long does delivery take?
A: Standard production 15–25 days, plus shipping. Express air freight available for urgent orders.
Q: What heat treatment depth can you guarantee?
A: Tread hardness depth ≥8 mm after induction quenching, verified by cross-sectional hardness mapping.
Q: What warranty do you offer?
A: 12 months or 2,000 working hours, covering material and manufacturing defects under normal use.
Q: Can you match OEM part numbers exactly?
A: Yes, we cross-reference Kobelco OEM numbers and produce dimensionally identical replacements.
Q: Do you provide material certifications?
A: Each shipment includes SGS-test reports and an ISO9001 certificate of conformity.
Maintenance Guide
- Check track sag daily and adjust tension to manufacturer specification to avoid accelerated bushing wear.
- Inspect rollers and idlers weekly for oil leakage or seal damage; replace immediately if floating seals fail.
- Monitor sprocket tooth profile – replace when worn to a sharp point to prevent chain elongation and pitch mismatch.
- Remove packed debris from the undercarriage after each shift to minimize abrasive wear on links and rollers.
- Measure link pitch every 500 hours; replace the chain when elongation exceeds 3% of original pitch.