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- Luoxin Industrial Cluster, Luoyang City,Henan Province,China
Single-row four-point contact ball slewing bearings is a kind of slewing bearing with sophisticated design and superior performance. It can effectively handle a variety of loads and provide reliable rotational motion. It plays a key role in many applications with high requirements on space, weight and load capacity.
The inner ring has a precision-machined raceway that contacts the steel balls. Similar to the inner ring, the outer ring also has a precision-machined raceway that contacts the steel balls.
As rolling elements, they are arranged between the raceways of the inner and outer rings. The diameter and number of the balls depend on the size and load-carrying capacity required of the bearing.
These components are located between the steel balls and their main function is to evenly space the steel balls, prevent them from rubbing against each other, and ensure that the steel balls roll smoothly in the raceways.
In order to prevent dust, moisture and other contaminants from entering the bearing while retaining the grease inside, slewing bearings are usually equipped with seals between the inner and outer rings. These seals can be lip seals or labyrinth seals, etc. Used to regularly inject grease to ensure good lubrication inside the bearing, reduce friction and wear, and extend service life.
Typically equipped with integral sealing to prevent external dust, impurities and moisture from entering the bearing while preventing internal grease from leaking out, thereby extending the service life of the bearing and reducing maintenance requirements.
Slewing bearings usually operate at low speeds, and in many cases even intermittent rotation or limited angle swing. Single-row four-point contact ball slewing bearings are very suitable for these conditions and can withstand the resulting impact loads.
As rolling elements, steel balls have relatively low friction resistance, which enables the bearing to maintain smooth and accurate rotation even under low speed or swinging motion conditions, and the starting torque is also small. This is essential for equipment that requires high-precision positioning or smooth operation.
Usually, the inner and outer rings are equipped with standardized or customized mounting holes, which are convenient for direct bolt connection with the upper and lower support structures of the equipment. Some models can also integrate gears (external or internal), simplifying the design and installation of the drive mechanism and reducing the overall manufacturing cost and assembly time.
Compared with multi-row or crossed roller slewing bearings, single-row four-point contact ball slewing bearings usually have thinner sections and more compact structures. This helps to achieve lightweight and miniaturization of mechanical equipment, especially for applications with strict space restrictions.
This is its most notable feature. The raceway is usually designed in a Gothic arch (or V-shaped) shape, so that the steel ball forms two contact points with the inner and outer raceways in both the radial and axial directions, for a total of four contact points. This design enables the bearing to withstand multiple loads at the same time and simplifies the mechanical structure.
