Heavy-Duty H-Link Assembly for Kobelco SK350 Excavators
Rugged H-link assembly tailored for Kobelco SK350-class excavators. Designed to ensure stable boom-to-arm articulation under high-impact and heavy-duty excavation. Precision-forged and CNC-machined for enhanced durability and long-term reliability.
| Colors | Black or yellow or customized |
|---|---|
| Surface Hardness | HRC52-58 |
| Material | Q235B, Q345B |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
What Is the Function of the SK60 H-Link?
In large-scale hydraulic excavators like the Kobelco SK350, the H-link serves as the primary mechanical connection between the boom and arm, guiding load transfer and articulation during digging, lifting, and breakout tasks. Unlike smaller machines, SK350 units operate in high-pressure environments such as mining, heavy demolition, and deep foundation work, where each component must handle extreme axial forces and repetitive shock.
A high-quality H-link ensures that movement between the boom and arm remains stable and precisely aligned, preventing abnormal stress transfer to the boom cylinder and bucket linkages. Any distortion, wear, or misalignment in this part can lead to accelerated bushing damage, loss of hydraulic efficiency, and even structural failure under load.
Material Specifications and Surface Treatment
To match the demands of large excavator applications, our SK350 H-link is forged from Q345B or Q235B structural steel, with Q345B preferred for its superior yield strength and impact resistance. After forging, the component is CNC-machined with tight tolerances, ensuring precise hole geometry and seamless integration with the surrounding structure.
Critical load areas may undergo selective heat treatment to improve fatigue resistance, especially where high-stress cycling is expected. The finished surface is shot-blasted and coated with either industrial-grade primer or electrophoretic coating, providing long-term protection from rust, mud, and abrasive environments.
Every unit is inspected for dimensional accuracy, pin-hole clearance, surface integrity, and weld soundness prior to shipment.
Pre-Machining Storage
Before final processing, each H-link is carefully stored after forging and initial shaping. You can see the robust raw units neatly stacked and ready for CNC machining and heat treatment — a testament to our in-house forging capability and batch processing control.
Export-Ready Packaging
Once machining, inspection, and anti-rust treatment are complete, the finished H-links are securely packed in palletized crates or wooden boxes, ensuring safe transport over long distances. All packages are labeled for easy identification and can be customized with your logo or barcode if required.
Compatibility & OEM Reference Numbers
This H-link is a direct replacement for Kobelco SK350-series excavators and variants with the same linkage interface, including:
- SK350-8 / SK350LC / SK350D
- Other models sharing compatible boom-arm geometry
If you're unsure of your exact model or casting code, just send us your serial number, measurement sheet, or technical drawing — our team will verify compatibility within 12 hours.
OEM Undercarriage Parts for Kobelco Excavator
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| KOBELCO | SK30 | SK35 | SK40 | SK45 | SK55 | SK60 | SK60-8 | SK60-10 |
| SK75 | SK100 | SK120 | SK120-5 | SK120-6 | SK130 | SK135 | SK135SR | |
| SK135SR-2 | SK140 | SK140SR | SK200 | SK200-3 | SK200-5 | SK200-6 | SK200-8 | |
| SK200-10 | SK210 | SK210-8 | SK210LC | SK220 | SK230 | SK230LC | SK250 | |
| SK250-8 | SK260 | SK260LC | SK270 | SK300 | SK300-6 | SK300-8 | SK320 | |
| SK330 | SK330-6 | SK350 | SK350-8 | SK350LC | SK380 | SK400 | SK450 | |
| SK480 | SK480-8 | SK485 | SK500 | SK500LC | SK850 | SK850LC | ||
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Built for Tough Operating Conditions
The SK350 is commonly used in harsh environments where conventional components often fail. Whether you're working in rock excavation, deep trenching, or heavy demolition, this H-link is designed to handle intense vertical loads and dynamic lateral forces without distortion or cracking.
Its robust design ensures it holds alignment across thousands of cycles, helping protect the boom, stick, and cylinder components from cumulative stress. By preserving structural balance in extreme jobs, this H-link plays a silent yet vital role in extending the life of your machine.
Inspection & Quality Assurance
Every H-link undergoes rigorous quality checks before shipment:
- 3D dimensional inspection using coordinate measuring machines (CMM)
- Go/No-Go pin test to validate pin hole tolerances
- Ultrasonic flaw detection for internal defects
- Batch hardness testing to ensure consistency across forged units
Our QC system ensures your replacement part arrives ready for immediate, hassle-free installation.
Installation & Maintenance Tips for Longevity
To maximize the working life of your SK350 H-link:
- Grease pin interfaces every 100–200 hours depending on jobsite dust levels
- Inspect pin holes regularly for signs of elongation or bushing wear
- Avoid overloading the boom-arm assembly in one-sided or high-leverage operations
- Replace both the link rod and H-link together if wear is present on both sides
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
