The slewing bearing is a kind of large bearing which can bear comprehensive load and can bear large axial load, radial load and overturning moment at the same time. Its function is to connect two parts of the machine to support the weight and work load of one part, and enable one part to rotate relatively to the other part. The products can be used in wind energy, medical equipment, heavy equipment, machinery industry, etc.
Single row four-point contact ball slewing bearing is composed of two seat rings. It is featured by compact structure, light weight and four-point contact between ball and arc raceway. It can bear axial force, radial force and overturning torque at the same time. This type of bearing is applicable to slewing conveyor, welding operating machine, and construction machinery like small-and-medium cranes and excavators.
Single row cross roller slewing bearing is composed of two seat rings. It is featured by compact structure, light weight, high manufacturing and assembly accuracy and small installation clearance. The roller is cross arranged with a ratio of 1:1. The bearings can withstand axial force, overturning moment and large radial force at the same time, and is widely used in hoisting and conveying machinery, engineering machinery and military products.
The double row ball slewing bearing has three seat rings. The balls and spacers can be directly arranged into the upper and lower raceways. According to the force condition, the balls with different diameters can be arranged in the upper and lower rows.
This kind of open assembly is very convenient. The bearing angle of the upper and lower arc raceways is 90℃. It can bear a great deal of axial force and overturning torque. When the radial force is greater than 0.1 times the axial force, the raceway needs special design. The axial and radial dimensions of the double row ball slewing bearing are relatively large and the structure is firm, which makes it especially suitable for loading and unloading machinery like above-medium-diameter tower crane and truck crane.
The three row roller slewing bearing has three seat rings. The upper and lower rollers and the radial raceways are separated, so that the load of each row of roller can be accurately determined, and can bear various loads at the same time. It is one of the four products with the largest bearing capacity. Its axle and radial dimensions are large and its structure is firm. It is especially suitable for heavy models requiring larger diameter, such as bucket wheel excavators, wheel lifting, port crane, molten steel table and large tonnage truck crane.