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- Luoxin Industrial Cluster, Luoyang City,Henan Province,China
The double-row ball slewing bearing transmits the load of the inner and outer rings through two rows of steel balls. Due to the two rows of rolling elements, it can more effectively distribute the axial, radial and overturning moments, thereby bearing a larger composite load than a single-row bearing. The presence of two rows of steel balls also enhances the overall stiffness of the bearing.
Good seals can effectively prevent dust, impurities and moisture from entering the bearing while retaining grease and extending the bearing life.
The double-row ball slewing bearing consists of an inner ring and an outer ring. The cage separates the two rows of steel balls and guides them to be evenly distributed, preventing the steel balls from contacting each other, reducing friction and increasing the bearing life.
Usually there are two sets of raceways, one for each row of balls. The raceway form can be a Gothic arch with four-point contact, or other forms according to specific needs.
This is its most important structural feature. It has two rows of steel balls with independent or shared raceways. These steel balls are usually of the same or different diameters and are arranged between the inner and outer rings.
Greater load capacity and better load distribution help reduce raceway and rolling element fatigue, thereby extending bearing life.
Due to its solid structure and excellent load-bearing capacity, double-row ball slewing bearings are particularly suitable for use in harsh working environments and where loads change frequently.
The contact angles of the two rows of raceways can be optimized for loads in different directions (axial force, radial force, overturning moment). For example, the arc angles of the upper and lower raceways are usually designed to be 90° to withstand large axial moments and overturning moments to the greatest extent.
Due to its strong load-bearing capacity, the double-row ball slewing bearing has a higher safety factor when carrying large loads, reducing the risk of failure.
The design of two rows of steel balls greatly increases the overall rigidity of the bearing, effectively resists deformation, and maintains the stability and precision of the mechanical system under heavy loads.
This is the most prominent advantage of the double-row ball slewing bearing. Compared with a single-row four-point contact ball slewing bearing of the same size, the double-row design can significantly increase the load-bearing capacity of axial, radial and especially overturning moments. This makes it very suitable for bearing heavy loads and harsh working conditions.
