RK250-2 RK250-1 PH450-3 crane swing bearing slewing bearing crane

1,Single row four point contact ball slewing bearing
2,Single row cross roller slewing bearing
3,Double-row ball slewing bearing
4,Three-row roller slewing bearing
5,Roller/Ball Combination Slewing bearing.

Bearing Parts

Steel ball/Roller:carbon-chromium bearing steel GCr15SiMn or GCr15 for rolling Material

Cage: include integral cage, segment cage and spacer-type cage. 20# steel or copper for integral and segment cages, PA 1010 resin or QA110-3-105 albronze for spacer-type cages.

Seals:uses NBR or VITON, few felted wool.

Single row cross roller slewing bearing

Composed of two or three rings. compact structure, light weight, high manufacturing accuracy, small assembly gap and high requirement for installation accuracy. Rollers are 1:1 cross-arranged.
Can be bear axial force, overturning moment and large radial force at the same time,and widely used in lifting transportation, construction machinery

Three row roller slewing bearing

Three row roller bearing able to bear all kinds of loads at the same time, it is the largest one of the four structural products with large axle and radial dimensions and firm structure. Especially suitable for heavy machinery requiring larger diameter, such as bucket wheel stacker and reclaimer, wheel crane, marine crane, port crane, ladle turret,large tonnage truck crane,heavy machinery and so on.

Single row four point contact ball slewing bearing

Single row four point composed of two seat rings. has compact structure, light weight, and four-point contact between steel ball and arc raceway. It can bear axial force, radial force and overturning moment at the same time. The construction machinery of rotary conveyor, welding manipulator, small and medium-sized crane and excavator can be selected.