The double-row ball slewing bearing has three races. The steel balls and spacers can be directly discharged into the upper and lower raceways. 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 ball slewing bearing 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.
Double row ball slewing bearing ring is mainly made of 50Mn, 42CrMo .
The two row ball slewing ring has been widely used in many applications:
Fire truck
- Pump truck
- Some bigger tower cranes
- Truck mounted crane
| Products discription | |||
|---|---|---|---|
| Model Number: | 071.20.752 | Brand name | longwei |
| Production Experience | Since 2004 | Applicable Industries: | Building Material Shops, Machinery Repair Shops, Construction works |
| Feature: | THREE ROW ROLLER | Gear Options: | Internal Gear |
| Material: | 50Mn/42CrMo/Customized | Seals Type: | exterior sealing OR As requirement |
| Keywords: | Slewing bearing/slewing ring/slew ring/slew bearing/slew gear | CERTIFICATE: | ISO9001:2008/SGS |
| Bore Diameter | 758 mm | Outside Diameter | 1042mm |
| Operating tempereature: | -30°C +70°C | Hardness: | 55-62HRC |
| Product Name: | Double Row Ball Tooth hardening Slewing bearing bearing for Excavator | Service: | OEM Service.Design Service |
| Net Weight : | 250kgs | Gear Options: | External Gear |
| Application | Rotating Machine, all types crane | Testing | In house or third party |
| MOQ | 1 SET | Size | Standard OR Customized |
| Height | 124 mm | H.S. Code | 848210900 |
| Packaging Details | 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 | Product Type: | Precision Four Point Contact Bearing |
| Plane deviation of mounting bracket P (mm) | ||||
|---|---|---|---|---|
| Raceway center diameter | Plane deviation of mounting bracket P (mm) | |||
| DL(mm) | single row four ball | double row ball | cross roller | |
| ~1000 | 0.15 | 0.2 | 0.1 | |
| >1000~1500 | 0.19 | 0.25 | 0.12 | |
| >1500~2000 | 0.22 | 0.3 | 0.15 | |
| >2000~2500 | 0.25 | 0.35 | 0.17 | |
| >2500~4000 | 0.3 | 0.4 | 0.2 | |
| >4000~6000 | 0.4 | 0.5 | 0.3 | |
| >6000~8000 | 0.5 | 0.6 | 0.4 | |
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:
Advantages:
1. The double row ball slewing bearing has high load-bearing capacity and can withstand large axial and radial loads.
2. The double row ball slewing bearing 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.
Purpose:
1. Double row 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.
You can contact us if you have any problem for heavy duty slewing ring bearing.
FAQ :
1 LW Slewing Bearing Heat Treatment
Heat Gear Slewing Bearings are in the majority of cases supplied with spur tooth. Stub teeth also is ok.There are two kinds of tooth hardening. They are normalizing and tempering, According to the different applications, there are two ways of quenching. They’re whole tooth quenching and single-tooth quenching. Single-tooth quenching can be divided into tooth surface & root quenching and tooth surface quenching.
2 . The Calculation of Slewing Bearing.
Static load capacity
The determined loads must be multiplied with a factor fstat allocated to the application. The product Fa’ or Mk’ must be below the static critical load curve of the selected bearing.
With regard to radial loads in load combinations
Fa = axial load
Fr = radial load
Mr = tilting moment
3 Protection Against Corrosion
We make Protection Against Corrosion on surface of bearing,and make couple of packing paper.
4.Customize.
Yes,we have professional technical terms.
5.Warranty:
General 1 year.
6.Reliable reputation.
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