Kobelco track link assemblies form the core flexible track chain, connecting track shoes and transferring machine weight through the undercarriage.
As a factory-direct manufacturer, Dingtai provides full OEM production for global distributors, equipment dealers, and construction fleet owners.
Our track link assemblies resist elongation and breakage, reducing unplanned downtime and protecting idlers, sprockets, and drive motors.
Dingtai has supplied heavy machinery components for over 20 years, with ISO9001 and SGS certification verifying consistent quality management.
We use 35MnB steel and deep induction quenching on link contact surfaces to deliver long service life under high-impact loads.
Core Selling Points
- Premium 35MnB Material: Forged link bodies made from high-tensile 35MnB steel provide excellent impact toughness and resistance to cracking under heavy loads.
- Deep Quenching/Heat Treatment: Induction hardening on rail surfaces creates 52–58 HRC hardness, minimizing wear and extending track chain service intervals.
- Global Brand Compatibility: Precision pitch and pin/bushing dimensions ensure direct fitment on Kobelco SK series excavators and other common models.
- ISO9001/SGS Certified: Every batch follows ISO9001 quality procedures and SGS material verification, ensuring repeatable performance for demanding jobsites.
Our catalog of Kobelco Track Link Assembly includes various specifications, fully compatible with Kobelco excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Link Body Material | 35MnB high-tensile alloy steel |
| Pin Material | 40Cr with induction hardening |
| Bushing Material | 20CrMnTi carburized steel |
| Surface Hardness | HRC 52–58 |
| Manufacturing Process | Precision forging, CNC machining, induction quenching |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 months or 2,000 working hours |
2. OEM & Customization
We match customer drawings and Kobelco OEM part numbers, producing exact replacement link assemblies with strict tolerance control.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Mini Excavator | Kobelco | SK30, SK35, SK50, SK55 |
| Medium Excavator | Kobelco | SK75, SK135, SK140, SK210, SK230 |
| Large Excavator | Kobelco | SK260, SK330, SK350, SK480, SK850 |
4. Delivery & Logistics
We ship from Quanzhou with export-grade packing, factory-direct pricing, and flexible order quantities from sample sets to full container loads.
Technical Features
Track link assemblies operate as a continuous load-bearing chain. Precision-forged links maintain consistent pitch, preventing uneven sprocket wear and vibration.
Induction-hardened pins and carburized bushings create a tight joint. This reduces internal friction and extends service intervals under abrasive conditions.
Deep quenching on link contact surfaces achieves HRC 52–58, resisting deformation and wear where the chain contacts rollers and idlers.
Applications
- Mining and quarrying
- Road construction
- Demolition and recycling
- Forestry operations
- Heavy civil engineering
Frequently Asked Questions
Q: What is the minimum order quantity for Kobelco track link assemblies?
A: Standard MOQ is one set, including left and right track chains. Mixed model orders are accepted.
Q: How long is delivery?
A: Standard models ship within 15–25 days. Custom OEM production requires 30–45 days depending on quantity.
Q: What heat treatment depth do the track links have?
A: Induction hardening depth is typically 4–8 mm on link contact surfaces, with hardness of HRC 52–58.
Q: What warranty policy is provided?
A: We provide a 12-month or 2,000-working-hour warranty against manufacturing and material defects.
Q: Can Dingtai match Kobelco OEM part numbers?
A: Yes. Send the OEM part number or drawing, and we cross-reference the correct track link assembly specification.
Q: Are these track link assemblies direct-fit for original Kobelco machines?
A: Yes. Pitch, pin diameter, and bushing dimensions are machined to OEM tolerance for direct bolt-on installation.
Maintenance Guide
- Regular Inspection: Check link height, bushing wear, and pin clearance every 250 operating hours to catch elongation early.
- Track Tension Adjustment: Maintain the correct track sag specified by Kobelco; over-tightening accelerates pin and bushing wear.
- Wear Limit Replacement: Replace link assemblies if link height wear exceeds 25% or if bushings show cracking or loose fit.
- Bolted Joint Torque: Use calibrated torque values when installing track shoe bolts to prevent joint loosening during operation.
- Pin/Bushing Rotation: Rotate or replace pins and bushings at half service life to extend overall undercarriage life and reduce cost.