023.40.1400 double row varilable diameter ball slewing bearing for RUD Flexible ship loader

Ship loaders and ship unloaders are important in ensuring the effective, material-saving and dust-free transportation of bulk goods on the shipping route. Coal, ores, phosphate, sulphur and fertilisers, but also food, such as grains, are fed onto continuously operational conveyor belts, and transported on a cantilever by means of the ship’s open loading hatch. From there, the goods get to the ship’s cargo space either in free fall, via a downpipe, or a slide.

For the ship to be optimally filled, it has to be moved under the cantilever. Elaborate manoeuvring can, however, be avoided if the cantilever’s unloading system is movable. This is where slewing bearings made by LONGWEI  come into play.

In port operations, handling and shipyard cranes are an essential support in transporting products, goods, and parts. These cranes are often rail-bound and characterized by their reliable technology and high durability. Since our bearings can withstand even the highest demands and loads, they have already been used around the world for several years.

Selecting a slewing bearing with an appropriate structure can effectively increase the bearing capacity, have a longer service life, and ensure the smooth and efficient operation of the equipment.

The motor or reducer drives the pinion to rotate, and the pinion drives the slewing bearing to rotate, so that the upper mechanism connected to it rotates accordingly.


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.

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.


Double row ball slewing bearing is a type of slewing bearing, which has the following advantages and uses:



  1. The Double row varilable diameter ball slewing bearings has high load-bearing capacity and can withstand large axial and radial loads.
  2. The Double row varilable diameter ball slewing bearings rotates smoothly, has a small friction coefficient, and operates smoothly and reliably.
  3. The installation method of the double row ball slewing bearing is flexible, and it can be fastened with bolts or connected with flanges.
  4. The double row ball slewing bearing has a longer lifespan and can work stably in harsh environments.



  1. Double row varilable diameter ball slewing bearings are widely used in fields such as engineering machinery, metallurgical equipment, and light industry machinery.
  2. Double row ball slewing bearings are also commonly used in equipment such as cranes, rotating platforms, and machine tools.
  3. Double row ball slewing bearings can also be used for equipment such as turntables, cranes, and anchor chain machines in ships and marine engineering.

Longwe Transmission  slewing bearing team is committed to keep the spirit of continuous improvement and focus our strategy of strict quality control standards, quick response, prompt delivery and low price.We look forward to working on all of our customers’ growing demands. Our ability to optimize the bearing design for your specific needs is unparalleled and we will assist you throughout the design, manufacturing and implementation process.

Products type

1.single – row four – point contact ball
2.single – row Cross roller
3.double row of different diameter ball
4.Three – row roller
5.double row ball
For Non-gear, External Gear, Internal Gear

Special services

1.slewing bearing design
2.Produce by your drawing
3.OEM service

Business type

manufacturer,trading company


1.ISO 9001:2008 certificate,12 years experience2.High qualified material,low MOQ,excellent quality,competitive prices,
professional advice
3. Standard and non standard are all acceptable
4. OEM available
5.Stronger loading capacity, Larger radial and axial force bearing ability
6.Independent R&D team
7.Strict quality control management
8.Exquisite technological standard
9.Sufficient stock
10.Excellent after sales service


50Mn/42CrMo or as your requirements


1.First lubricated, Second circled with plastic film,kraft paper,blue belt,then packaged inwooden case,last gathered in Wooden pallet.2 According to your requirements

Delivery time

1.For general product , our delivery time need only 5 days is enough (goods in stock).2.If you have special technical requirements or need additional processing,we first rder need only 45 ys, if that is roller continuous order, our delivery time only need 35 ys.

Application fields

Mine machine, port hoisting machine, port oil transfer equipment onshore and offshorecrane,excavator,concrete machine,paper machine, plastic and rubber machine, weavemachine, steel plant, electronic power plant, wind power generator, other construction

and industry machines or equipment.

We supplied high quality product & good service to every end user and valued distributors all over the world. We’ve enjoyed a very good reputation up to now.

Our manufacturing standard is according to machinery standard JB/T2300-2011, we also has been found the efficient Quality Management Systems(QMS) of ISO 9001:2015 and GB/T19001-2008. We devote ourselves to the R &D of customized slewing bearing with high precision,special purpose and requirements and has acquired certificate of China Classification Society .

If you have any questions, pls do not hesitate to contact us.

slewing bearing flexibility test
slewing bearing shown on the exhibition


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.


There are no reviews yet.

Be the first to review “023.40.1400 double row varilable diameter ball slewing bearing for RUD Flexible ship loader”

Your email address will not be published. Required fields are marked *

Xuzhou Longwei Transmission Machinery Co., Ltd

Follow Us

We're Ready, Let's Talk.

Scroll to Top

Submit Your Request

Contact us for the latest product catalog and quotation