Ball Bearings, Thrust Ball Bearings, Spherical Roller Thrust Bearings, Slewing Bearings and other Non-standard types according to customers’ demands.Especially Slewing Bearings,they are used in a wide range of applications,including metallurgy, petroleum, chemical industry, general machinery, cement, paper making, industrial machine tools, mining and other industries. Slewing bearing has been developed as a new machine part in recent 30 years. It is first used in excavator and crane, and then applied to other machines. Slewing bearing is almost the same as oversize ball and roller bearing.It shows double-row ball Slewing bearing’s structure and how Slewing bearing is used in Caterpillar Crane. It connects the upper and lower parts of the machine, bearing the weight and working load of the upper part, and makes the upper slew relatively. Slewing bearing, like common bearing, has roller and rolling ring with raceway. But, compared with common roller bearing, it has many special features. They can be summarized in the following points: The size of Slewing bearing is great; its diameter is generally between 0.4m~10m, some even is up to 40m. Slewing bearing usually bears load from different parts. It doesn’t only bear the axial force, radial force, but also tipping moment simultaneously. Therefore, a set of Slewing bearing often completes the functions of many sets of common roller bearing. The speed of Slewing bearing is fairly low, usually below 10 r/min. Moreover, on most occasions, Slewing bearing doesn slew continually,but only slew back and force in a certain angle like the so called Swing Bearing. Slewing bearing differs greatly from roller bearing in process techniques, material and heat treatment. Generally, Slewing bearing has gear ring as driving device and Seal Device to pretend dust. Unlike the common bearing fixed on the central pivot in the bearing box, Slewing ring bearing has big size and is attached to upper and lower plates by bolts.
