Hitachi EX150-5 9146953 Swing Turntable Bearing for excavator slewing bearing

Hitachi EX150-5 9146953 Swing Turntable Bearing for excavator slewing bearing

The slewing ring (also known as a slewing bearing or turntable bearing) is a critical component in excavators, enabling 360-degree rotation between the upper structure (house) and the undercarriage. It supports axial, radial, and moment loads while ensuring smooth movement for digging, lifting, and material handling operations.

Basic Components

A slewing ring consists of four core elements:

1. Inner and Outer Rings

   • Forged from high-carbon chromium steel (e.g., 42CrMo4 or 50Mn) for durability.

   • Heat-treated to HRC 55-60 hardness.

   • Gear teeth may be machined onto the outer/inner ring for drive mechanisms.

2. Rolling Elements

   • Ball bearings: Used in lighter loads (common in mini excavators).

   • Roller bearings: Cylindrical or tapered rollers handle heavy axial/radial loads (e.g., large excavators).

3. Raceways

   • Precision-ground tracks for rolling elements.

   • Hardened surfaces resist brinelling and wear.

4. Seals and Lubrication

   • Rubber or polyurethane seals prevent debris/water ingress.

   • Grease channels for automatic lubrication systems.

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.