Dingtai manufactures Kobelco track rollers as critical undercarriage components that support excavator weight, guide track chain movement, and maintain stable ground contact under load.
We are a factory-direct manufacturer offering complete OEM production, custom dimensions, and direct pricing for global distributors, rental fleets, and equipment owners.
Our rollers resist premature wear, reduce track derailment risk, and prevent unscheduled downtime in demanding earthmoving and excavation applications.
With over 20 years of engineering experience and ISO9001/SGS-certified processes, Dingtai delivers repeatable quality, documented traceability, and measurable service life.
Rollers use 35MnB alloy steel, deep quenching, and sealed lubrication systems to withstand heavy loads, side impacts, and abrasive working environments.
Core Selling Points
- Premium 35MnB Material: Forged from 35MnB alloy steel for high tensile strength, impact resistance, and extended wear life under heavy equipment loads.
- Deep Quenching/Heat Treatment: Tread and flange surfaces are deep quenched to 48–56 HRC, delivering consistent hardness without core brittleness or early cracking.
- Global Brand Compatibility: Precision-engineered to replace Kobelco SK-series OEM part numbers with exact dimensional matching, bore sizing, and mounting fit.
- ISO9001/SGS Certified: Every production batch follows ISO9001 quality systems and SGS material inspection, ensuring certified reliability and full material traceability.
Our catalog of Kobelco Track Roller includes various specifications, fully compatible with Kobelco excavators and crawler equipment.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 50Mn alloy steel |
| Tread Hardness | 48–56 HRC |
| Hardened Depth | 8–12 mm |
| Process | Forging, CNC machining, heat treatment, precision grinding, assembly |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 months / 2,000 working hours |
2. OEM & Customization
Dingtai matches OEM drawings, part numbers, and custom dimensions. We produce rollers to exact Kobelco specifications, including flange profiles, bore sizes, and tread geometry.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Hydraulic Excavator | Kobelco | SK200-8, SK210LC-8, SK230, SK250, SK260 |
| Large Excavator | Kobelco | SK330, SK350, SK480 |
4. Delivery & Logistics
Factory-direct pricing with flexible MOQ. We ship globally via sea, rail, or air with standard export packaging and reliable production lead times.
Technical Features
Floating seal design prevents lubricant loss and contamination ingress, extending roller service life in wet, abrasive, and high-load operating conditions.
Forged 35MnB steel shells provide high tensile strength. Deep quenching creates a wear-resistant tread while retaining a tough, impact-absorbing core.
Precision-machined shafts and bimetal bushings ensure smooth rotation, reduce friction heat, and maintain dimensional stability under continuous side loads.
Applications
- Open-pit mining
- Quarrying and aggregate extraction
- Road construction and earthmoving
- Demolition and site preparation
- Heavy civil infrastructure projects
Frequently Asked Questions
What is the MOQ for Kobelco track rollers?
Standard MOQ is 4 pieces per part number. Sample orders can be arranged for first-time evaluation and fitting confirmation.
How long is delivery time?
Regular models ship in 15–25 days after order confirmation. Custom OEM production typically requires 30–45 days depending on quantity.
What heat treatment depth do you apply?
Tread and flange surfaces are deep quenched to 48–56 HRC with a hardened depth of 8–12 mm depending on the part number.
What warranty do you provide?
Warranty is 12 months or 2,000 working hours against manufacturing defects under normal operating conditions.
Can you match Kobelco OEM part numbers?
Yes. Supply the OEM part number or drawing, and we confirm dimensional compatibility before production begins.
Do you provide samples before bulk order?
Yes, sample orders or pre-production samples can be supplied for fitting confirmation and quality approval.
What certifications do your rollers have?
Products follow ISO9001:2015 quality systems and can be supplied with SGS material test reports for full traceability.
Maintenance Guide
- Inspect track rollers weekly for oil leakage, flange wear, and abnormal lateral play.
- Check track tension regularly; improper tension accelerates roller, sprocket, and chain wear.
- Clean debris from the undercarriage to prevent abrasive material packing around roller seals.
- Replace rollers when tread wear exceeds 30% or flange grooving becomes deep and uneven.
- Use OEM-specified torque when mounting bolts; re-check torque after the first 50 operating hours.