132.50.4500 three row roller Slewing Bearing with external gear for Shipboard Crane

The gantry crane, which like the loading and shipyard cranes also runs on railways, is indispensable for the loading of goods with very high requirements.

  •  On the portal of the upper part of the crane, the so-called trolley, which can transport heavy loads, crosses the direction of travel. Our products prove to be important construction and connecting elements for the loading of the heaviest of goods.

The port crane is a crane specially designed and manufactured according to the requirements of port loading and unloading operations. The slewing bearings used in port cranes are mainly heavy-duty slewing bearings, which are required to carry large axial forces and overturning moments. The main function is to support the upper mechanism and control the rotation of the upper mechanism.


The port crane is a crane specially designed and manufactured according to the requirements of port loading and unloading operations.

Classification of port cranes

The port portal crane is a portal crane with high working speed used for dock loading and unloading operations.

Crane with bucket door

Shore grab ship unloader (ship unloader) is a crane specially used for bulk cargo unloading operations with grab trolleys running along the bridge.


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.


The port wheel crane is a wheel crane that meets the special needs of port loading and unloading operations in terms of structure and performance.


The port pedestal crane is used for loading and unloading operations at the frontier wharfs of inland ports, and is a jib-type crane mounted on a fixed gantry.


Port floating crane is a floating crane used for port loading and unloading operations.


The dock barge crane is a jib crane fixed on the floating wharf (pump ship) of the inland port, and its structure and performance meet the special needs of port production.

The port haulage crane is used for loading and unloading operations at the frontier wharf of the inland port with a large water level difference. It is a light jib crane mounted on the cable car.



 Longwei Transmission is a professional manufacturer of slewing bearing , integrating R&D, design and production.

Our company has advanced induction quenching lathe, all the slewing bearings’ raceway are processed bny surface induction quenching.

The hardness will assure in the range of 55HRC ~ 62HRC, and can reach to enough depth for quenching.

We can make the integral quenching of teeth, it is better used for the excavator slewing bearing.

Now we also supply the slewing bearing to XCMG, SANY and any other big company in China and foreign.

For the large size diameter three row roller slewing bearing is special suitable for the heavy duty machinery such as wheeled excavator, ship crane, ladly turrets etc.

We also get ISO9001:2015, CCS, SGS, we accept the third party inspection, our quality stand the test.


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.


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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