What'S The Slewing Bearing? Slewing Bearing Structure

 Slewing rings are sealed on both sides, lubricated with a high quality
grease, can be relubricated via lubrication nipples and are particularly
easy to fit. The bearing rings are supplied without gear teeth or,
in order to achieve simple drive solutions, are available with external
or internal gear teeth.
  slewing rings are designed as:
■ four point contact bearings
– these slewing rings without preload are robust and proven
under very demanding operation; they place only slight demands
on the flatness and perpendicularity of the adjacent construction
– they are suitable for applications with low requirements for
accuracy and rigidity of the bearing arrangement, for example in
simple metalworking machines, wind power equipment and
construction machinery
■ crossed roller bearings
– these preloaded slewing rings can support higher loads than
four point contact bearings. They have proved themselves
particularly where bearings are subjected to high radial forces
and moderate axial and tilting moment loads
– they are suitable for applications with uniform running free from
stick-slip, low rotational resistance and high requirements for axial
and radial runout accuracy and rigidity, for example in robots,
handling systems and machine tools. 

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. We use 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 four point contact ball slewing bearing.
It is composed of two seat rings. It 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.

Single row cross roller slewing bearing
It is composed of two or three rings. It has compact structure, light weight, high manufacturing accuracy, small assembly gap and high requirement for installation accuracy. Rollers are 1:1 cross-arranged. It can bear axial force, overturning moment and large radial force at the same time. It is widely used in lifting transportation, construction machinery and military products

Three row roller slewing bearing
It have three seat rings, the upper and lower raceways and the radial raceways are separated, so that the load of each row of roller can be determined accurately. Being 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. It is especially suitable for heavy machinery requiring larger diameter, such as bucket wheel stacker and reclaimer, wheel crane, marine crane, port crane, ladle turret and large tonnage truck crane. Heavy machinery and so on.