Wholesale Swing Ring Slewing Bearing fit Doosan Excavator
Heavy-duty slewing bearing designed for Doosan excavators such as DX220, DX300LC, and DH225. Forged from premium alloy steel and precision-machined for consistent 360° upper structure rotation under load. Features heat-treated internal gear teeth, hardened raceways, and anti-rust packaging—engineered for quarrying, demolition, and high-cycle construction work.
| Material | 50Mn/42CrMo |
|---|---|
| Surface Hardness | HRC58-62 |
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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.
In Doosan excavators, the slewing bearing connects the upper structure to the undercarriage, enabling full 360° rotation during digging, swinging, or dumping operations. It must withstand:
Axial and radial loads from lifting and digging
Tilting moments during offset excavation
High-frequency rotation with sudden directional changes
For machines like DX220LC or DH300, any failure in the swing bearing can lead to dangerous cabin vibration, loss of alignment, or drivetrain damage. That’s why proper fitment, heat treatment, and gear precision are essential for both performance and safety.
Manufacturing Process & Image Integration
Our Doosan slewing bearings are built through a multi-stage process that ensures both strength and precision.
Material & Technical Features
- Material: 42CrMo / 50Mn forged alloy steel
- Tooth Profile: Internal gear matched to Doosan OEM drive
- Hardness: Raceway and gear teeth hardened to HRC 50–60
- Tolerance: ±0.03mm on gear teeth and bolt holes
- Seal Type: High-durability rubber seal or labyrinth-style seal
- Greasing Port: Pre-drilled for easy field lubrication
All units are 100% pressure-tested for backlash, torque resistance, and raceway smoothness.
Forged Ring Pre-Machining
Our process begins with high-quality alloy steel rings (typically 42CrMo), forged and polished for flatness and crack-free integrity. These rings form the structural base of both inner and outer components.
Gear Cutting on Inner Ring
The internal ring is CNC-machined to form a precise gear tooth profile, then heat-treated to HRC 50–60. Each tooth is checked for spacing, profile accuracy, and alignment with Doosan swing motor pinions.
Final Packing & Storage
After inspection, the slewing bearings are coated with anti-rust oil, wrapped in plastic, and packed in strong wooden crates. Labels include model code, part number, and batch information for easy identification and shipping control.
Doosan Model Compatibility
This slewing bearing supports a wide range of Doosan excavators including:
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| DOOSAN | DH30 | DH35 | DH50 | DH55 | DH60 | DH60-7 | DH80 | DH130 |
| DH130-2 | DH150LC-7 | DH150W-7 | DH170 | DH180 | DH200W | DH210W-7 | DH220LC | |
| DH225LC | DH220LC-7 | DH225LC-7 | DH280LC | DH300-5 | DH300-7 | DH300LC-7 | DH320 | |
| DH370LC-7 | DH400LC-7 | DH450 | DX55 | DX60 | DX80 | DX140LC | DX160LC | |
| DX200A | DX225LC | DX260LC | DX300LCA | DX340LC | DX420LC | DX500LC | DX800LC | |
And other crawler excavators.
Still unsure about your model? Send us your machine serial number, old bearing casting, or technical drawing, and we’ll verify the correct fitment within 12 hours.
Quality Inspection Workflow
To ensure lasting performance, each bearing goes through:
- Gear profile inspection and clearance test
- Raceway hardness and surface finish testing
- Bolt hole layout and tolerance check
- Full rotation simulation with torque resistance
- Visual QC for welds, cracks, or debris
This guarantees low noise, stable rotation, and long service life in high-load environments.
Packaging & Export Ready
All Doosan swing bearings are:
- Coated with anti-corrosion oil
- Sealed in moisture-proof plastic
- Packed in palletized or crate-type wooden boxes
- Labeled with model and QC batch ID for tracking
We support OEM-branded packaging, barcode labeling, and special pallet arrangements for overseas distributors.
Why Choose Us
We offer more than just components—we offer confidence in every rotation.
- OEM-standard forging and gear processing using high-grade alloy steel
- Fast fitment confirmation—simply send us your Doosan model or dimensions
- Global shipping & inventory support, with strong packaging and tracking
- On-site support and technical advice for swing bearing wear or failure
- Flexible MOQ, allowing you to order one unit or full container loads
We’ve supported Doosan dealers and repair shops worldwide with slewing bearings that deliver durability, precision, and reliable field performance.
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.
