Doosan DX800 Swing Slewing Bearing Wholesale
The DX800 slewing bearing is a high-capacity swing ring engineered to deliver reliable rotation, structural stability, and long service life for Doosan’s large-class mining excavators.
| 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.
The Doosan DX800 is built for high-production environments such as open-pit mining, quarrying, and large-scale earthmoving. In this class of machine, the slewing bearing does far more than allow the upper structure to rotate—it carries massive vertical loads, absorbs side forces from digging, and keeps the entire upper frame aligned with the undercarriage.
This DX800 slewing bearing is engineered to meet those demands, providing the mechanical foundation that allows the excavator to swing smoothly, accurately, and safely even when handling extremely heavy material.
Engineered for Large-Scale Excavation Forces
When the DX800 is digging in hard rock or loading heavy haul trucks, the slewing bearing is constantly exposed to a combination of axial load, radial force, and overturning moment. The raceway geometry is designed to distribute these loads evenly across the rolling elements, preventing stress concentration in any single area.
This balanced load path helps protect the upper structure and swing drive system from distortion, which is especially important for machines operating long hours in high-impact conditions.
Optimized Gear Interface for Smooth Swinging
For DX800 units with an integrated ring gear, the tooth profile is designed for quiet, efficient engagement with the swing motor pinions. Proper gear geometry reduces backlash, improves power transfer, and helps extend the service life of the swing drive components.
This results in smoother acceleration and deceleration when swinging the upper structure, which is especially noticeable during truck loading and fine positioning.
High-Strength Rings and Precision Raceway Design
The bearing rings are manufactured from high-grade alloy steel chosen for its fatigue resistance and structural stability. After machining, the raceways are heat treated to achieve a hardened surface that resists rolling wear while maintaining a tough core that can withstand shock loads from sudden digging resistance or swinging with a full bucket.
Precision machining ensures smooth contact between the rolling elements and the raceways, reducing friction and keeping rotation stable even under heavy load.
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.
Stable Rotation and Structural Integrity
A well-built slewing bearing contributes directly to the overall stiffness of the machine. By keeping the upper structure aligned and rotating smoothly, it reduces unwanted movement in the boom base and swing platform. This stability improves digging accuracy, reduces vibration, and helps maintain predictable machine behavior during heavy lifting and slewing operations.
Installation Accuracy and Long-Term Reliability
Dimensional accuracy and flatness of the mounting surfaces are tightly controlled to ensure proper installation on the DX800 swing platform and carbody. Correct fitment allows the bearing to achieve the intended preload, which is essential for uniform load distribution and long-term reliability.
A properly installed slewing bearing also minimizes uneven bolt stress and helps avoid premature fatigue of the mounting hardware.
Maintenance Considerations
Regular lubrication is the key to extending the service life of the DX800 slewing bearing. Greasing keeps the rolling elements protected and helps flush contaminants away from the raceways. Periodic checks for abnormal noise, vibration, or increased backlash can identify early signs of wear before they develop into serious problems.
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.
