OEM Excavators Parts Slewing Bearing for Caterpillar CAT
Heavy-duty slewing bearing for Caterpillar excavators, engineered to handle high-impact rotary motion across digging, lifting, and loading operations. Built from forged 42CrMo steel and CNC-machined to match OEM swing system geometry. Internal gear teeth are heat-treated and precision-profiled for reliable performance in CAT models such as E200B, 320D, 330C, and 336D.
| 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 Caterpillar excavators, the slewing bearing is the core rotary connection between the upper carriage and lower undercarriage. It transmits vertical and radial loads from the boom and bucket while allowing smooth 360-degree movement of the entire upper body.
From urban trenching to quarry operations, CAT machines like the 320D or 336DL rely on a well-built swing bearing to:
- Maintain stable rotation under shifting loads
- Prevent misalignment between cab and frame
- Absorb shock loads from uneven or rocky terrain
- Ensure precise operation of the swing motor and gearbox
If the slewing bearing becomes loose, noisy, or uneven, it can lead to structural wear, reduced cycle times, and unsafe machine behavior.
Slewing Bearing Production Process
Our slewing bearings are built through a multi-stage process that ensures both strength and precision.
Product Features & Technical Details
- Material: 42CrMo (forged), with HRC 50–60 surface hardness
- Gear Type: Internal gear, optimized for CAT swing motors
- Runout Precision: Maintained within ±0.03mm
- Surface Treatment: Anti-corrosion coating for extended shelf life
- Seal Type: Double-lip seal for protection in dusty or wet conditions
- Lubrication: Grease ports pre-installed for field servicing
- Noise Level: Low-friction design for reduced operational sound
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 inner ring undergoes CNC gear milling to create a tooth profile that precisely matches Volvo swing pinions. After cutting, teeth are quenched and tempered to resist wear and deformation during high-load engagement.
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.
Model Fitment – CAT Swing Bearing Applications
We have slewing bearings that can match the following models.
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| CATERPILLAR-CAT | CAT55 | CAT225 | CAT245 | CAT311 | CAT312 | CAT312B | CAT315 | CAT320 |
| CAT320B | CAT320C | CAT320D | CAT320L | CAT322 | CAT324 | CAT325 | CAT325B | |
| CAT325BL | CAT330 | CAT330B | CAT330BL | CAT330C | CAT330D | CAT345 | CAT345B | |
| CAT973 | E55 | E70 | E70B | E120 | E120-1 | E120B | E140 | |
| E200B | E200-5 | E215 | E240 | E300B | E300L | E311 | E312 | |
| E312B | E320 | E320BL | E320C | E320D | E320DL | E320L | E320S | |
| E322B | E322C | E324 | E324D | E324DL | E325 | E325B | E325L | |
| E329DL | E330 | E330B | E330C | E330D | E330DL | E345 | E345B | |
| E450 | CAT301.5 | CAT302.5 | CAT303.5 | CAT305 | CAT307 | CAT308 | CAT313 | |
| CAT316 | CAT318 | CAT320E | CAT320GC | CAT323 | CAT326 | CAT329 | CAT336 | |
| CAT340 | CAT349 | CAT350 | CAT365 | CAT374 | CAT375 | CAT385 | CAT385CL | |
| CAT390 | CAT390D | CAT390DL | CAT390FL | CAT395 | CAT6015 | CAT6015B | CAT6015D | |
| CAT6020 | CAT6020B | CAT6030 | CAT6030B | CAT6030D | CAT6040 | CAT6040B | ||
Still not sure about your part number? Send us the machine serial number, casting code, or technical sketch, and we’ll verify compatibility within 12 hours.
Testing & Inspection Process
Every slewing bearing undergoes the following inspections:
- Raceway hardness testing
- Gear profile runout and backlash check
- Bolt hole and bore dimension inspection
- Full 360° rotation test under simulated load
- Surface visual inspection and protective coating validation
Only after passing every stage is the bearing cleared for shipment.
Export-Ready Packaging
Our slewing bearings are designed for international logistics:
- Protective anti-rust coating
- Shrink-wrap film and sealed crate packing
- Stackable wooden boxes labeled for model and order tracking
- Optional OEM-branded or neutral cartons for resale partners
We ensure safe delivery whether you need one unit or a full container.
Why Choose Us
We specialize in precision undercarriage and rotary systems for global excavator fleets. For your Caterpillar slewing bearing needs, we offer:
- 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
When it comes to long-lasting swing performance, we help you turn with confidence.
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.
