021.30.1120 doublerow variable dismeterwith external gear Container lifting spreader beam

The operation sites for crossbars are very different. These include production halls, factory premises, logistics centers and container terminals, amongst others. Resilient and powerful components are needed to transport the relevant goods. We offer specially designed slewing bearings and rings for different requirements. In addition, we also deliver reliable and cheap standard models suitable for several deployment scenarios.

Quayside container crane (quayside container crane) is a container crane that is located at the front of the container terminal and can move along the shore to align with the cargo position of the ship for loading and unloading operations.
021.25.800 Double row different diametrer ball Caterpiller 816F Landfill compactor

The double-row four-point contact ball slewing bearing structure is similar to the single-row ball slewing bearing, except that it uses two rows of steel balls as rolling elements, the two rows of steel balls have the same size, and a single isolation block is set between the steel balls. The inner and outer rings are integral, and the steel balls are inserted by plugging the holes. It is the first choice for the main engine with heavy load and limited radial structure size.


If you need heavy duty slewing bearing, we recommend you our Double-row ball slewing bearing.

They could bear huge axial loading and radial loading. It is especially suitable for heavy machinery requiring larger diameters.

Such as bucket wheel excavators and wheels type cranes, ship cranes, port cranes, molten steel running platforms and large-tonnage truck cranes and other machinery.



The double-row reducing ball double-row ball slewing bearing has three races. The steel balls and spacers can be directly discharged into the upper and lower raceways. According to the stress conditions, two rows of steel balls with different diameters are arranged. This kind of open assembly is very convenient. The load-bearing angle of the upper and lower arc raceways is 90°, which can bear great axial force and tilting moment. When the radial force is greater than 0.1 times the axial force, the raceway must be specially designed. The axial and radial dimensions of the double-row reducing ball slewing ring are relatively large and the structure is tight. It is especially suitable for loading and unloading machinery such as tower cranes and truck cranes that require medium or larger diameters. 


There are many forms of slewing bearing, but their structure composition is basically the same. Outer ring (toothed or toothless),. Sealing belt,. Rolling element (ball or roller), oil nozzle, plug, plug pin, inner ring (toothed or toothless), spacer or cage, mounting hole (threaded or smooth).

Turntable bearing, also known as slewing bearing, is a kind of large bearing which can bear large axial load, radial load and overturning moment at the same time. Turntable bearings are usually equipped with mounting holes, internal or external gears, lubricating oil holes and sealing devices, so that the main engine structure design is compact, the guide is reliable and the maintenance is convenient.



Our factory, longwei slewing bearing co.,ltd can produce both standard and non-standard products.

As meeting customers’ demand is our service principle.

We provide spot, generation processing, drawing processing, sample processing, free design and other services.

Slewing ring is a new type of mechanical parts that has gradually emerged in the world in the past 40 years. It consists of inner and outer rings, rolling elements, etc. At present, the slewing ring produced in my country is mainly designated by the Ministry of Machinery Industry in the early 1980s.

Small slewing ring bearing could be used in many area. Such as small turntables, small machine, and so on.

slewing bearing shown on the exhibition
products picture


1: How to order?

Please refer to the help under the single payment.
2.What are the shipping methods?
Ocean shipment to the port close to your city; Air shipment to the airport close to your company; Door to door service by international express.
3.When can I get the price?
We usually quote within 12 hours after we get your inquiry. If urgent to get the price, please call us or tell us by email , we will regard your inquiry priority.
4.You are a trader or a manufacturer?

We are an industry and trade integration business, our factory located on Xuzhou City.
5.How about the payment terms?
We usually accept T/T or L/Cat sight . other terms also could be negotiated.
6.What is your minimum order?

It depends on what you are buying. Normally, our minimum order is 1pcs.
7.What is your delivery time?
If there are any parts in stock , our delivery time is only 3-7 days. If our standard model,the delivery time is around 25 days,if non-standard model,the delivery time is 38~45 days.



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