Dingtai manufactures the Kobelco U-Yoke as a precision-forged structural steel connector, engineered to transfer high dynamic loads within Kobelco excavator undercarriage and linkage systems.
We operate as a factory-direct supplier, providing full OEM and replacement part production with direct engineering support for distributors and fleet maintenance teams worldwide.
This component resists bending, cracking, and fatigue failure under severe digging and travel impacts, reducing unplanned downtime and premature replacement costs.
Dingtai holds ISO9001 and SGS certified processes, supported by 20+ years of manufacturing experience serving mining, construction, and heavy equipment sectors.
We use 35MnB alloy steel with deep quenching, controlled tempering, and CNC machining to deliver accurate dimensions, optimal hardness, and long service life.
Core Selling Points
- Premium 35MnB Material: Forged from high-strength 35MnB alloy steel, providing superior yield strength and impact toughness for demanding Kobelco excavator applications.
- Deep Quenching/Heat Treatment: Uniform through-hardening and controlled quenching achieve consistent HRC values, improving wear resistance and minimizing fatigue cracking risk.
- 100% QC Inspection: Every U-Yoke receives dimensional, hardness, and ultrasonic inspection before shipment, ensuring repeatable part quality and zero-defect delivery.
- OEM Capabilities: We manufacture from OEM drawings or samples, supporting custom dimensions, hard-to-find model coverage, and neutral branding for global distributors.
Our catalog of Kobelco U-Yoke includes various specifications, fully compatible with Kobelco excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40CrMo / OEM specified |
| Hardness | HRC 28–34 (OEM range) |
| Heat Treatment | Deep quenching, tempering, stress relief |
| Manufacturing Process | Precision forging, CNC machining, boring |
| Certification | ISO9001:2015, SGS material report |
| Warranty | 12 months or 2,000 operating hours |
2. OEM & Customization
Submit OEM part numbers, drawings, or samples; Dingtai reverse-engineers exact dimensions, tolerances, and material grades. We support custom machining, branding, and neutral packaging.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavator | Kobelco | SK130, SK140LC, SK200, SK210LC, SK230SR, SK250, SK260 |
| Excavator | Kobelco | SK330LC, SK350LC, SK380, SK480LC, SK500 |
4. Delivery & Logistics
Factory-direct pricing, flexible MOQ, and reliable global shipping by sea, air, or express. Stock items ship fast; custom production follows mutually confirmed lead times.
Technical Features
Precision forging aligns steel grain flow along the U-Yoke profile, maximizing tensile strength and resistance to bending stress generated by excavator linkage loads.
Deep quenching and tempering creates a hardened wear surface while retaining a ductile core, preventing sudden fractures under impact and fatigue conditions.
CNC machining ensures concentric bore alignment and exact pin fit, reducing uneven load distribution that accelerates bushing and pin wear.
Applications
- Mining
- Road construction
- Quarrying and aggregate
- Demolition
- Heavy civil earthmoving
Frequently Asked Questions
Q: What material is used for the Kobelco U-Yoke?
A: 35MnB alloy steel is standard; 40CrMo or other OEM-specified steel is available upon request.
Q: What is the minimum order quantity?
A: One unit for stock items or sample approval; custom production may require a small batch quantity.
Q: How long is delivery?
A: Stock U-Yokes ship within 7–15 days. Custom production normally takes 25–35 days after drawing confirmation.
Q: How deep is the heat treatment?
A: Heat treatment depth follows OEM specifications. Standard quenching achieves specified hardness depth plus a tough core to resist fracture.
Q: What warranty do you provide?
A: 12 months or 2,000 operating hours against manufacturing defects under normal use.
Q: Can you match OEM part numbers?
A: Yes. Provide the OEM part number, drawing, or sample, and we cross-reference to manufacture an exact-fit replacement.
Q: Do you support custom dimensions or branding?
A: Yes, we support custom dimensions, machining, and neutral or private-label packaging for volume buyers.
Q: How do you ensure quality?
A: Every batch is checked for dimensional accuracy, hardness, and material certification before shipment.
Maintenance Guide
- Inspect bores, pin bosses, and weld zones for cracks or deformation every 500 operating hours.
- Check pin-to-bore clearance. Replace the yoke if clearances exceed OEM limits to prevent side load.
- Grease pivot points with approved lithium-based grease to reduce metal-to-metal contact and corrosion.
- During installation, align bores precisely before driving pins to avoid stress concentration and early failure.
- Store spare U-Yokes in a dry, covered area and apply rust preventive oil on machined surfaces.