Common faults and troubleshooting of mobile cranes slewing bearings

Mechanical failure
Crane slewing bearing plays the role of connecting the truck and chassis  parts in the rotary mechanism, and also supports the whole rotating part of  crane.If the steel ball in the swing bearings is damaged and the raceway  abrasion will affect the work of the rotary mechanism, in severe cases, the  rotary mechanism will be heavy and make noises, and the pressure of the  rotary hydraulic system will exceed the rated value.When hoisting and  unloading are carried out at the stop of rotation, the vibration amount of  the slewing bearings will be too large at the moment of falling and falling  together, indicating that the clearance amount of the slewing ring has  seriously exceeded the limit.At this point, the turntable bearings should  be repaired or replaced.

The general causes of mechanical failure are inadequate maintenance and  improper use.

Kaydon brand MT series slewing bearing MTE/STE-324T

The bearing section of MT series turntable bearings is rectangular, with dimensions ranging from 4 inches to 47 inches, 100 to 1,200 mm.This series of products is the most cost-effective.The internal structure of the bearing includes deep groove raceway and maximum size ball.This structure enables the series to withstand higher torque, thrust, and radial loads than typical four-point contact ball bearings.The bearing groove has a larger size of perfect seal and non-contact dust cover, which has certain effect on preventing pollutants.This design enables the series to perform well in many applications from light to heavy loads.

INA brand four-point contact ball slewing bearing VLU200544-N

Slewing ring is a kind of large bearing which can bear comprehensive load and can bear large axial, radial load and overturning moment at the same time.slewing bearing are generally equipped with mounting holes, internal or external gears, lubricating oil holes and sealing devices, which can make the design of the main engine compact, easy to guide and easy to maintain.

Turntable bearings in the real industrial application is very extensive, known as: "the machine is mainly should implement the joint", its use is widely used in: crane, rail crane, port cranes, deck cranes, metallurgical cranes, container cranes, excavators, filling machine, and CT machine standing wave therapy apparatus, navigation instrument, radar antenna, tanks and robots, and revolving restaurant, etc.

IMO flanged slewing bearing 91-200641-07132

Single row four-point contact ball flange slewing bearings which is consist of two seat, compact structure, light weight, rolls four point contact ball and circular arc, and can withstand the axial force and radial force and overturning moment.

Our products have high precision, long life, high quality and low price.The company's technical excellence, different customers to implement professional optimization design to meet the needs of customers.Our products are exported to Asia, Europe and America etc.more than 50 countries.

FRB Bearings supply excavators slewing bearings

Swing bearings(slewing rings,slewing ring gears,swing ring,turntable bearings) for Komatsu,Hitachi,Kobelco,Caterpillar,Volvo/Samsung,Deawoo/Doosan&Hyundai Excavators.

Slewing rings are usually used for low revolution while shaking and strained with an enormous axial force,moment and in some parts with radial force simultaneously.Consequently the requirements for loading are stricter than ordinary bearings.If the selection of the bearing has been wrong it will cause a great damage.Hence it is necessary to evaluate the exact forces acting on the slewing ring and to select the suitable slewing ring.