A four point contact ball slewing ring is a type of slewing ring, a rotating rolling element bearing that usually supports a heavy but slowly turning or slowly oscillating load, usually a horizontal platform, such as a traditional crane, or the windward platform of a horizontal axis windmill . The single-row four point contact ball bearing slewing bearing is composed of two races, with compact structure, light weight, four point contact between the steel ball and the arc raceway, and can bear axial force, radial force and tipping moment at the same time.
The single-row four point contact ball slewing bearing is a large bearing that can bear axial load, radial load and overturning moment at the same time. It has the characteristics of compact structure, stable movement, high precision and strong bearing capacity, and is widely used in construction machinery , military equipment, entertainment facilities and other fields, it mainly transmits the load and motion through the point contact between the inner and outer rings and the rolling elements. Due to the large transmission load and the small contact area, the stress concentration in the contact area is very obvious.
Features of four point contact ball slewing bearing:
The four point contact ball bearing is a separable structure, and a single bearing can replace the angular contact ball bearing combined with the front or the back.
It can bear radial load and two-way axial load, and can limit the axial displacement in two directions, but it occupies less axial space than the double row angular contact ball bearing of the current specification.
Compared with other ball bearings, four point contact ball bearings have smaller axial clearance and higher limit speed when the radial clearance is the same.
four point contact ball bearings are suitable for bearing pure axial load or combined axial and radial loads mainly based on axial load. Because it is a double half inner ring (or outer ring), the number of balls is increased, and it has a larger bearing capacity.
Under normal working conditions, when this type of bearing bears an axial load in any direction, it can form a contact angle, and the steel ball contacts the inner and outer raceways at one point to avoid large sliding friction in the contact area. Therefore, the bearing should not bear mainly radial force and load.
The above is the "four point contact ball slewing bearing" for you. The single-row four point contact ball slewing bearing for construction machinery has superior technical performance and economy, and is a good choice. If you want to know more about For questions about Series HS Internal Gear slewing bearing, please contact Yantai Zhiyuan Machinery Co., Ltd., a professional manufacturer of Slewing Bearing, welcome your inquiry, thank you.