RKS.23.0741 Slewing bearing with flange 848*634*56mm for cargo
RKS.23.0741 Slewing ring with flange belongs to light series
four-point contact ball slewing bearings without a gear, It consist
of inner ring outer ring and ball parts.we had the bearing
RKS.23.0741 to our Europe customer.
The RKS.23.0741 Slewing bearing details as following:
|Ball brand||LYC brand|
|structure||Four point contact ball|
|SEAL material||Rubber Sealed On Both Sides|
For the RKS.23.Bearing product list as following:
|Bearing type||Outer diameter(mm)||Inner diameter(mm)||Height(mm)||weight(KGS)|
|RKS.23 0941||1 048||834||56||54|
|RKS.23 1091||1 198||984||56||62|
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
The blanks of bearing rings are mainly made of rods and tubes,
while the forging process is only applicable to rods. However,
forgings are the most used blank materials in bearing
manufacturing, and are suitable for large and medium-sized
bearings. Forging can be divided into hot forging, cold forging and
warm forging. Hot forging refers to processing above the
re-crystallization temperature of the billet metal, warm forging is
forging at a temperature not exceeding the re-crystallization
temperature, and cold forging refers to forging at normal
The purpose of ferrule forging: 1. Through forging, obtain a blank
with a size similar to the product, improve the utilization of
metal materials, reduce the amount of machining, and reduce costs.
2. Forging can eliminate the internal defects of the metal, improve
the structure, and thus increase the service life of the bearing.
General process of forging:
Bar material ,inspection, heating, blanking, secondary heating,
forging, rolling,cooling, annealing, cleaning
Rough turning: Rough turning is performed according to the drawing
of the turning process, and the cutting speed and cutting amount
are strictly implemented according to the technical regulations
(the general cutting speed is 5 rpm. The cutting amount is 10mm ~
2.2 Rough turning aging: After the rough turning of bearing parts
is completed, three-point support and flat laying is not allowed
(stacking is not allowed), and the precision turning processing can
be performed after the aging time is not less than 48 hours.
2.3 Fine turning bearing parts When finishing turning, the cutting
speed is 6 to 8 revolutions per minute, and the cutting amount is
0.3 to 0.5 mm.
2.4 Precision turning: In order to prevent the parts from deforming
when the bearing parts are finally finished, the parts must be
loosened to make the parts in a non-stressed state. The turning
speed is 8 revolutions per minute and the cutting amount is 0.2 mm.
2.5 Cross and three-row roller slewing bearing inner ring special
process: To prevent cross and three-row roller slewing bearing
inner ring from deforming after heat treatment. The turning process
must be performed in pairs, that is, the raceway is back-to-back
processing. No cutting is performed before heat treatment, and
cutting is performed after heating.
2.6 Finished car after heating: After the inner and outer rings of
the bearing are heat-treated, the finished car turning process is
carried out, and the technical procedures are the same as 2.3 and
3.1 Raceway surface quenching: The bearing raceway surface is
quenched at medium frequency, the hardness is not less than 55HRC,
the depth of the hardened layer is not less than 4mm, the width of
the soft belt is less than 50mm, and the "S" mark is marked
accordingly. (Sometimes customers can request carburizing,
nitriding, carbonitriding, etc.)
3.2 Tempering after heat treatment: After the intermediate
frequency quenching of the inner and outer rings of the bearing, it
is required to be exposed to 200C degrees for 48 hours before being
baked. To ensure that internal stresses disappear.
Rolling and milling processing—4.1 For turntable bearings with
internal and external teeth, the grinding and milling teeth must be
carried out before the grinding process, and they must be processed
in strict accordance with the technological requirements, with an
accuracy level of 8 or more.
5.1 Scribing: After measuring the external dimensions of the part,
carry out the scribing and positioning procedures according to the
dimensions specified in the drawing. The holes should not differ
from each other by more than 3%.
5.2 Drilling: Check the scribe line size according to the drawing,
and then perform the drilling process after ensuring that the
dimensions are correct. The inner sleeve turntable bearing mounting
holes should be combined and processed, and the error between the
holes at 180C degrees between the soft belts should not be greater
6.1 Coarse grinding: Use medium corundum and soft three-grained
granularity of 36 degrees and atmospheric hole resin grinding
wheels for grinding. The line speed is controlled at 1500 rpm to
prevent raceway burns. The maximum grinding depth must not exceed 1
6.2 Fine grinding: Use resin wheel grinding with a granularity of
46 degrees or 60 degrees, the grinding amount should be less than
that of rough grinding, and the finish must reach the level
specified in the drawing