Excavators Slewing Bearing Ring Parts Supplier Compatible with Kobelco
Heavy-duty slewing bearing designed for Kobelco SK series excavators, including SK200, SK210, and SK250 models. Built with forged alloy steel, precision-machined raceways, and hardened internal gear teeth, this swing ring ensures smooth 360° upper-body rotation under demanding site conditions.
| 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 Kobelco machines such as the SK210 and SK250, the slewing bearing supports the rotation of the entire upper structure—boom, arm, and cabin—across continuous digging, swinging, and dumping operations. It handles a combination of:
- Vertical pressure from lifting loads
- Axial torque during directional swings
- Radial forces from boom shifts and sudden braking
A high-quality slewing ring maintains tight backlash control, ensuring efficient swing motor performance and structural balance, especially when the machine operates on uneven or sloped terrain.
Manufacturing Process
Our slewing bearings are built through a multi-stage process that ensures both strength and precision.
Product Features & Technical Details
- Material: Forged 42CrMo alloy steel
- Gear Type: Internal gear (induction-hardened)
- Raceway Hardness: HRC 50–58
- Precision Tolerance: ±0.03mm runout
- Sealing: Water & mud-resistant double-ring seals
- Tested Rotation: Each unit tested under load before packing
- Greasing: Pre-installed lube ports for fast maintenance
Forged Ring Pre-Machining
Forged Steel Ring (Pre-machining)
Each bearing starts with a heat-treated 42CrMo steel ring, forged to withstand stress fatigue. Surface polishing ensures flatness before gear cutting.
Gear Cutting on Inner Ring
Using high-precision CNC gear cutters, we machine internal teeth on the inner ring. Tooth profiles are optimized to match Sumitomo’s swing motor pinion and then induction hardened to resist shear and wear.
Final Packing & Storage
Finished Product Packaging
After passing final inspections, the slewing bearing is grease-coated and rust-proof wrapped, then packed in labeled wooden crates with part tracking, ready for global shipment.
Compatible Kobelco Excavator Models
We have slewing bearings that can match the following models.
| 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 | ||
If your part number or serial is unclear, just send us your machine model, bearing drawing, or key dimensions—we’ll verify compatibility in under 12 hours.
Quality Assurance & Testing
Every Kobelco slewing bearing undergoes a 5-step QC process:
- Ring flaw detection (UT) & material check
- Raceway surface roughness test (<Ra 0.4μm)
- Backlash and gear tooth accuracy test
- Full-circle rotational torque inspection
- Final visual QC, rust-proofing, and labeling
Only fully compliant products are released for export.
Export-Ready Packaging
- Anti-rust oil and vacuum-sealed plastic wrap
- Strong wooden crates with inner cushioning
- Labeling includes model, part code, and batch traceability
- OEM or neutral packaging available for dealers
- We support small MOQ, OEM rebranding, and full container export.
Frequently Asked Questions (FAQ)
Q: How do I know this fits my Kobelco machine?
A: Share your machine model, part code, or bearing photo—our team will confirm within 12 hours.
Q: Can I buy one piece?
A: Yes. We accept single-unit orders for replacements or urgent repair needs.
Q: Is this bearing interchangeable with OEM?
A: Our slewing bearings match OEM specs in gear profile, tolerance, and mounting hole alignment. Perfect for direct replacement.
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.
