Active Member
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[China]
Contact name:Jean Yang
JinHang Precision Bearing Co.,Limited |
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VSI 200744 N swivel bearing 816x648x56mm for floating crane cargo equipment
| Description | VSI 200744 N slewing ball bearing |
| Dimension(ODXIDXH) | 816x648x56mm |
| Outer diameter(OD) | 816 mm |
| Inner diameter(ID) | 648 mm |
| Width/Height/(H) | 56 mm |
| weight | 58kgs |
| Material | 42CrMo, 50Mn |
| Rolling | LYC ball |
| Teeth data | |
| do | 660mm |
| m | 6 |
| Teeth number | 110 |
| Package | Inside package: plastic film + kraft paper + blue tape; Outside package: standard export free-fumigation wooden case. |
| The delivery time | 20-30 days |
| Service | Technology communicate with engineer, and if you need the assembly drawing,we can send to you |
slewing bearing structure type list as following:
| Boundary size(mm)(dxDxH) | Teeth data | |||||
| slewing bearing type | Outer diameter(mm) | Inner diameter(mm) | Height(mm) | d 0 | m | z |
| VSI 200414 N | 486 | 325 | 56 | 335 | 5 | 67 |
| VSI 200544 N | 616 | 444 | 56 | 456 | 6 | 76 |
| VSI 200644 N | 716 | 546 | 56 | 558 | 6 | 93 |
| VSI 200744 N | 816 | 648 | 56 | 660 | 6 | 110 |
| VSI 200844 N | 916 | 736 | 56 | 752 | 8 | 94 |
| VSI 200944 N | 1016 | 840 | 56 | 856 | 8 | 107 |
| VSI 201094 N | 1166 | 984 | 56 | 1000 | 8 | 125 |
Slewing bearing surface treatment :
1.polishing treatment
2.galvanizing processing
3.phosphating treatment
4.Coating treatment
We have 70 employees, with 10 experienced engineers and
professional technicists. The most of Engineer from LYC and ZWZ
brand factory, they had owned produce and design and after sales
experienced to design the bearing.We can also design the drawing
according to the bearing work condition to meet the customer
requirement.
Manufacturing ability:
Equipped with advanced manufacturing CNC Machine and test
instruments to insure the accurate tolerance , all bearings are of
uniform marking and packing with superior quality, reasonable
prices and perfect services. Meanwhile we can make the module to
test the mounting hole.
Quality control:
All the bearing from the forging to assembly process,It will need
to inspect step.For the bearing forging we will need to test the
size and hardness and surface, for the lathe process and grinding
process,first it will need to check by the worker ,and then the
professional inspector will checking the size and accurate,The last
step the monitor will inspect the size. It can insure zero defect.
Forging process:
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
temperature.
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 ~
12mm).
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
2.43)
Slewing bearings VLA 200844 N perform extremely well in a
variety of applications such as:
• access platforms
• bucket wheel excavators
• conveyor booms
• cranes of all types
• small, medium and large excavators
• indexing tables
• ladle turrets
• offshore applications
• robots
• railway bogies
• rotary platforms
• stackers
• solar mirrors
• tunnel boring machines
• wind turbines
Main Types:
Single row ball slewing ring bearings
Double row ball slewing ring bearings
Crossed roller slewing ring bearing
Three row cylindrical roller slewing bearings
BALL & ROLLER combined slewing bearings
Flanged slewing ring bearing
Gear Type:
Slewing bearings with external gear
Slewing bearings with internal gear
Slew bearings without gear
Flange type:
Slewing bearings with external flange and internal gear
Slew rings with internal flange and external gear
Slew bearings with external and internal flange
