E349E swing bearing 333-3044 slew bearing for excavator spare parts

E349E swing bearing 333-3044 slew bearing for excavator spare parts

The excavator slewing ring (also called swing bearing) is a core component that connects the upper structure (cab, engine, etc.) with the undercarriage (track frame), enabling 360° unlimited rotation. Manufactured from high-strength alloy steel, it withstands enormous axial, radial, and moment loads.

2. Working Principle & Structure

Working Principle:
A hydraulic motor drives the pinion gear to engage with the internal gear ring, facilitating rotation. Double-row ball or roller bearings inside minimize friction.

Main Components:

• Outer ring (fixed part): Connects to undercarriage

• Inner ring (rotating part): Connects to upper structure

• Rolling elements: Steel balls/rollers (load-bearing core)

• Sealing system: Prevents contamination

• Gear ring: Meshes with swing motor pinion

• Grease fittings: Lubrication channels

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Our advantages

1.Strong part number database.
If you can provide the right model and part number, we can supply the right product.
2.Professional and experienced salesperson.
Our founder has been into this field for more than 7 years, with rich experiences.
3.Strict and complete company rules.
We will try our best to meet customer’s delivery time. Before delivery, we must verify the part number or pictures of products one by one, to make sure that customers can receive high-quality and right-quantity goods.
4.Good management system.
No matter how big or small order, as long as customers place the order, we will provide exporting service free for charge.
5.Good service attitude.
If the customer has any questions about the product, In our receiving and knowing the situation, we will help the customer to solve the problem in the first place. As long as customers’ requirements are reasonable, we will endeavour to make them satisfied.

FAQ:

1. If I only know the excavator model, but can not offer parts No., what should I do ?
If possible, you can send us pictures of old products, nameplate or the size for reference.
2. What is the warranty of the parts after I purchased?
The warranty is 6/12 Months based on the item details.
3. How can I pay the order?
We can receive payment through T/T, Paypal(for small amount),Alibaba trade assurance.
4. When will get the items after I place order?
Once your payment is confirmed, we will arrange the goods within 24 hours; if not in stock , we will inform you before placing the order.
5. How can I do if there is something wrong with the items?
First of all , I have confidence in the quality of our products ,if you really found something wrong ,pls provide pictures for us and we will check. After it is confirmed, pls return to us , we will offer the correct item.
6. What is your main products ?
We are specialized in the excavator spare parts, such as travel motor gearbox/ass’y/parts, swing gearbox/ass’y/motor/parts, hydraulic pump assy/parts and gear parts. If you need other excavator parts, we also can supply as your requirements.