023.30.900 Double row variable diameter ball slewing bearing for Missile Launcher

Military engineering ensures the security of country .Military devices are used on land, water and in the air. That means, they must work reliably under extreme conditions and in all of the world’s climate zones.

Our bearings are used both in heavy devices, such as armoured vehicles, and in sensitive optical devices. They are marked by their robustness, precision and reliability. Our bearing concepts are based not only on military norms and quality standards, but also on our decades-long experience and consequent research and development. Upon request, we are happy to carry out special measurements and tests in our R&D centre.

LONGWEI  slewing bearing is committed to the construction of the military industry and is suitable for a variety of complex geographical and working environments. The products have passed tensile strength, yield strength testing, anti-oxidation testing  etc. to ensure safety and smoothly operating.

LONGWEI slewing bearing offers a variety of customized slewing bearings and relative precision gear assemblies to meet specific demands. LONGWEI slewing bearing provides customers with tailored designing and professional technical support.

With unique coating treatment technology, LONGWEI brand is aim to apply for areas which requiring excellent corrosion fields. Our technology has been proven in main military applications. ITP and QC procedures are in line with the relevant technical requirements of government procurement. The complete QMS &Auditing by TPI enables LONGWEI slewing bearings to be prestigious in the military industry.

Products Description
Model Number:023.30.900 Brand namelongwei
Production Experience Since 2004 Applicable Industries:Military,Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Construction works , Energy & Mining, Food & Beverage Shops
Specificationfrom 200-5000mmGear Options:Internal Gear Only
Material:50Mn/Customized Seals Type:NBR( Nitrile Rubber) or as requirement
Outside Diameter300 - 5000 mmCERTIFICATE:ISO9001:2008/SGS
Bore Diameter758 mmOutside Diameter1042mm
Operating tempereature: -30°C +70°CHardness: 55HRC-62HRC
Product Name:Double row variable diameter ball slewing bearing Service:OEM Service.Design Service
Net Weight : 250kgs Rolling element:steel ball & Spacer
Warranty Period 1 yearTestingIn house or third party
KEY WORDInternal gear double row ball SizeStandard OR Customized
Height 124 mmH.S. Code848210900
Packaging Details1.Filling with rust-proof oil
2.packing with protective layers
3.Fixed in the plywood4.Packaging terms:Plywood case/ Pallet/Steel frame

Double row contact ball slewing bearing has three rings, balls and spacer blocks can be arranged in the upper and lower rings directly, Install two rows different diameters balls according to the stress conditions.This kind of open assembly is very convenient, for the upper and lower raceway arc Angle of 90°, can bear large axial force and tilting moment.When the radial force is greater than 0.1 times of the axial force, special raceway design is required.This types slewing bearings have large axial and radial dimensions and strong structure, so it is especially suitable for middle diameter tower crane, truck loading crane and other loading and unloading machinery.



  • n1 is No. of lube holes, the user can specify the lube hole position.
  • n-φ can be changed to threading holes, hole diameter M, thread depth 2M.
  • There are standard products in the catalog, and the inner and outer diameters are random tolerances. If there is a locating requirement for slewing bearing, please indicate the site and tolerance.
  • It is standard type of our products, if you need more please contact with engineer.
Plane deviation of mounting bracket P (mm)
Raceway center diameterPlane deviation of mounting bracket P (mm)
DL(mm)single row four balldouble row ballcross roller

About Longwei

Provide you with customized industry solutions

longwei factory

More than ten years of production experience, strict quality control can be the guarantee of the best solution in the industry.
China’s leading supplier of slewing bearings, its products have passed ISO 9001 and CAPE certification, and has a number of product patents.

The flexibility of our dialogue and approach with our clients is combined with responsive design and development innovation to ensure exceptional delivery.


Do you have any questions about our slewing bearing? Maybe you can find the answer below. If the answer below does not solve your problem, please contact us and our engineer will answer it for you.

1. Where is your slewing bearing manufactured?
Our slewing bearings are all manufactured in China. We not only have the ability to design and produce slewing bearings but the quality can also be guaranteed. At the same time, our slewing-bearing price is more favorable.

2. I don’t know which slewing bearing to use, can you choose for me?
Yes, of course, Each model has a parameter list on the website. You can choose the suitable slewing bearing according to these parameter lists. If you don’t know how to choose, you can get in touch with us and our engineers will work with you to choose the suitable product. We can also design a new slewing bearing solution for you according to your equipment.

3. Can I get your product catalog?
You can get our product catalog in the download or contact us, we will send the product catalog to you by email or other ways.

4. Can you customize products?
Yes, we can. Our engineers have very rich experience in slewing bearing design. On the customized slewing bearing page, you can see some special customized products designed by our engineers. These design solutions meet the special needs of many customers. Our engineers can also work with you to design a new slewing bearing.

5. Can you provide accessories?
Yes, we can provide matching spare parts such as motors, hydraulic motors, and encoders that are compatible with slewing bearings.

6. Can you provide a 3D model?
Yes. All our slewing bearings have 3D models, you can contact us to get them. At the same time, we can also provide CAD files and PDF files.

7. How long is your slewing bearing warranty period?
Our slewing bearing warranty time is 12 months. When you install, use, and store the slewing bearing, please refer to the slewing bearing instruction manual.

8. Can you choose the color of your slewing bearing?
Yes. Our slewing bearing is available in many colors. If you have special requirements, please tell our sales engineers, we are happy to provide services for you.


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