Excavators Slewing Bearing Ring Parts fit Kubota
Compact slewing bearing specially engineered for Kubota U-series and KX-series mini excavators. Built with forged steel raceways, CNC-machined gear teeth, and sealed for mud and moisture protection. Designed to deliver precise rotation and high durability for machines working in tight urban job sites or landscaping projects.
| Material | 50Mn/42CrMo |
|---|---|
| Surface Hardness | HRC58-62 |
Quick Quote Request
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 compact machines like the Kubota U30 or U50, the slewing bearing is the core component that allows the upper structure—boom, arm, and cabin—to rotate smoothly and safely over the undercarriage.
Whether trenching in residential zones, grading in parks, or digging in narrow alleys, the slewing bearing ensures:
- Accurate 360° movement under limited swing clearance
- Smooth load transition from upper frame to tracks
- Reliable performance even under uneven terrain or constant turning cycles
Reduced vibration and misalignment that could damage the hydraulic swing motor
Manufacturing Process
Our slewing bearings are built through a multi-stage process that ensures both strength and precision.
Product Features & Technical Details
- Material: 42CrMo (forged alloy steel)
- Gear Type: Internal gear, hardened to HRC 50–60
- Surface Tolerance: ±0.03mm runout for smooth swing operation
- Sealing System: Mud-resistant double seals for outdoor use
- Lubrication Ports: Compatible with standard grease fittings
- Pre-Shipment Testing: 100% rotation torque test and gear fit inspection
Forged Ring Pre-Machining
We begin with precision-forged 42CrMo alloy steel, cut and polished to shape the bearing’s inner and outer rings. All forgings are inspected for symmetry and grain consistency before machining.
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
Each bearing is coated in anti-corrosion oil, wrapped in plastic, and neatly packed in wooden crates—ready for container shipment. Every box is labeled with machine model and QC tracking code.
Model Compatibility – Kubota Excavator Fitment
We have slewing bearings that can match the following models.
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| KUBOTA | KX008-3 | KX016-4 | KX018-4 | KX021-3 | KX027-4 | KX030-4 | KX033-4 | KX035 |
| KX040-4 | KX057-4 | KX060-5 | KX080-3 | KX91-3 | KX121-3 | KX161-3 | U10-3 | |
| U15-3 | U17-3 | U20-3 | U25-3 | U27-4 | U35-4 | U48-4 | U55-4 | |
| U56-5 | U75-3 | RX101 | RX151 | RX202 | RX203 | RX303 | RX403 | |
| RX503 | RX504 | RX602 | RX703 | KH007 | KH014 | KH18 | KH28 | |
| KH41 | KH66 | KH90 | KH151 | KH191 | KH200 | KH230 | ||
Not sure which one fits? Just send us your serial number, part photo, or bearing dimensions, and we’ll identify the correct match in 12 hours or less.
Quality Inspection & Standards
Our bearings meet OEM-equivalent quality standards with the following tests:
- Tooth pitch and hardness check
- Bolt hole roundness & location tolerance inspection
- Raceway finish roughness measurement
- Simulated load rotation test
- Final visual QC and oil sealing before shipment
We ensure every bearing is ready for field installation upon arrival.
Export Packaging & Logistics
Each Kubota slewing bearing is:
- Oil-coated and sealed for anti-rust performance
- Wrapped in plastic and packed in export-grade wooden crates
- Crate-labeled for easy warehouse handling
- Available with neutral or branded packaging for resellers
We support both LCL and full container shipping, with fast global delivery options.
Frequently Asked Questions (FAQ)
Q1: How do I confirm if this slewing bearing fits my excavator?
A: Simply send us your machine model, serial number, or the casting code stamped on your old bearing. Our team will cross-check your specs and reply within 12 hours with the exact match.
Q2: Can I order just one slewing bearing, or is there a minimum quantity?
A: Yes, we support flexible order volumes, including MOQ = 1 unit for urgent replacements or sample testing. Bulk discounts apply for container orders.
Q3: Are these slewing bearings OEM quality?
A: Absolutely. We use forged 42CrMo or 50Mn steel, CNC gear machining, and induction hardening—all processes meet or exceed OEM dimensional and performance standards. Many of our bearings are used as direct OEM replacements by global dealers.
Q4: What if I can't find the part number?
A: No worries. Just provide a technical drawing, photos with key measurements, or the old bearing’s outer diameter, inner diameter, and bolt circle specs. We can assist with custom-matching.
Q5: How is the product packaged for export?
A: Every slewing bearing is coated with anti-rust oil, sealed in moisture-proof plastic, and packed in reinforced wooden crates. We also support OEM-branded, neutral, or custom packaging for resellers.
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.
Quick Quote Request
Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
