China Large Size Bearing/Turntable Bearing/Internal Gear Slewing Ring Bearing/Yrt Bearing/Cross Roller Bearing for Deck Crane, Wind Power and Machinery Construction with Good quality

Product Description

Large Size Bearing/Turntable Bearing/Internal Gear Slewing Ring Bearing/YRT bearing/cross roller bearing for Deck Crane, Wind Power and Machinery Construction

 

Product Description

ZYS slewing bearings can be divided into the following types according to their structures as single row 4 point contact ball slewing bearing, single row cross roller slewing bearing, double row different ball diameter slewing bearing, 3 row cylindrical roller slewing bearing and roller/ball combination slewing bearing. These types of bearings can be further divided into bearings without gears, bearings with external gears and bearings with internal gears.

Slewing bearing type

Single row 4 point contact ball slewing bearing
     This kind of slewing bearings can support high dynamic loads, transmitting axial and radial forces simultaneously as well as the resulting tilting moments. Applications of this kind of bearings are hoisting, mechanical handling and general mechanical engineering etc.

Single row cross roller slewing bearing
     This kind of bearings can support combinations of large radial force, medium axial force and tilting moment with small or zero clearance. Main applications of this kind of bearings are hoisting and mechanical handling and general mechanical engineering etc.

Double row different ball diameter slewing bearing
     This kind of bearings can support high static loads with simple structures. They are mainly used in situations with variational load position and direction and continuously rotating. Main applications of this kind of bearings are deck hoisting, mining and material handling etc.

Three row cylindrical roller slewing bearing
     This kind of bearings has high load carrying capacity. Under same loads, this kind of bearings has much smaller diameters which can make the installation much compact, as different kinds of loads are supported by different races and rollers. Main applications of this kind of bearings are hoisting, mechanical handling, mining and materials handling, offshore technology and general mechanical engineering etc.

Roller/ball combination slewing bearings
     This kind of bearings can support high axial load and low tilting moments. Usually they are large diameter slewing bearings. Applications of this kind of bearings are mining and materials handling etc.

Materials of slewing bearing 
1. Material of slewing ring: 42CrMo is generally used for CZPT slewing ring with surface quenching treatment of the raceway. Other kinds of surface quenched steel can also be used according to customer specification and operating conditions.
2. Material of rolling element: The material of rolling elements in CZPT bearing is GCr15 or GCr15SiMn steel.
3. Material of cage: Various types of cage are used in CZPT slewing bearing, which can be divided into integrated cage, segmented cage, spacer and etc. 20 steel or ZL102 cast aluminum alloy is used for integrated cage and segmented cage. For spacer,the material is polyamide 1571 resin, ZL102 aluminum bronze, QA110-3-1.5 aluminum bronze or GRPA66-25 nylon. 4. Material of sealing ring: The sealing ring is made of NBR.

 

Company Profile

About ZYS
HangZhou Bearing Research Institute Co., Ltd. is a hightech enterprise specializing in the development of “highrank, precise, advanced, unique,
special” bearing products for the key units in various fields of national economic construction. Its predecessor, HangZhou Bearing Research Institute, was established in 1958. It is the only state level comprehensive research institute in China’s bearing industry. In 1999, it entered China National Machinery Industry Group Co., Ltd. and transformed into a science and technology enterprise.
We focus on developing high performance bearing products for key units of national economic construction. We perform batch production of
various highrank bearing products and components with inner diameter of 0.6mm to outer diameter of 6.8m. We are mainly engaged in the research, development, production and sales of precision bearing, special bearing, highspeed machine tool spindle, bearing special equipment, bearing testing instruments, bearing testing machine and bearing special materials, which are widely used in the fields of machine tools, wind power generation, mine metallurgy, petrochemical, medical equipment, automobiles and rail transit, construction machinery, intelligent manufacturing services, etc.
We have total assets of 2.06 billion RMB, own 1 research and development center, 3 industrial bases and cover an area of more than 47
hectares. We have advanced bearing manufacturing equipments and world first class testing equipments and have solid strength in manufacturing, measuring and testing of bearing and related components with high precision and high reliability. We have more than 380 technical staff of bearing related disciplines, thus we maintain a leading position in the aspects of bearing design, basic theoretical research, lubrication technology, metallic and non-metallic materials, testing and industry standards.

Our Advantages

Many scientific research centers, laboratory and service agencies are set in our company, including National Bearing Quality Supervision and
Inspection Center, National Bearing Accreditation Laboratory, Industrial (Rolling Bearing) Product Quality Control and Technical Evaluation
Laboratory, National Rolling Bearing Standardization Technical Committee, ISO/TC4 Domestic Technology Responsible Unit, China Bearing
Industry Association Technical Committee, Machinery Industry Occupational Skill Identification Bearing Industry Subcenter, National Rolling Bearing Industry Technology Innovation Strategic Alliance, High end Bearing Tribology Technology and Application NationalLocal Joint Engineering Laboratory, State Key Laboratory of Shield Machine and Boring Technology (Bearing), Machinery Industry Highspeed Precision Bearing Engineering Research Center, ZheJiang Province Machine Tool Spindle Unit Engineering Research Center, ZheJiang Province High Performance Bearing Technology Key Laboratory, National Postdoctoral Research Workstation, ZheJiang Province Bearing Generic Technology Academician Workstation, State Intellectual Property Office Patent Exchange Station and so on. We have so far achieved 908 major scientific research achievements, among which there are 31 awards of National Invention Awards and National Science and Technology Progress Awards, and 234 awards of provincial scientific and technological achievement awards.We have attained 792 granted patents, among which there are 277 patents for inventions. In addition, we established and revised the bearing industry technical standards for over 670 times, and also issued 457 volumes of “Bearing” magazine.

Glory
Top 200 most promising companies of China in Forbes
Top 500 in China Machinery Industry
Excellent Enterprise with China Well-know Trademark
High-performance Bearings Laboratory
State Quality Supervision and Testing Center for Bearing
ISO/TC4 China Secretariat
The Research Center for High-speed Precision Bearing Engineering in Machinery Industry…

ZYS MANUFACTURING CAPACITY

Certifications

Application

 

ZYS bearing products

 

Packaging & Shipping

FAQ

Q: Are you trading company or manufacturer?
A: CZPT is bearing manufacturer, the only first-class comprehensive research institute in China bearing industry.

Q: How do you control quality of bearing?
A: CZPT has established quality control systems for each kind of bearing and spindle. All products and services passed ISO9001-2008 Quality Certificate.

Q: What is the MOQ?
A: It depends on the bearing type. You can send inquiry or send e-mail  for more information.

Q: How about the package?
A: Industrial packing in general condition (Plastic tube+ carton+ pallet). Accept design package when OEM.

Q: How long is the delivery time?
A: It will take about 10 to 40 days, depends on the model and quantity.

Q: How about the shipping?
A: We can arrange the shipment or you may have the forwarder.

Q: Is sample avaiable?
A: Yes, sample order is acceptable.

Q: Can we use our own LOGO or design on bearings?
A: Yes. OEM is acceptable. We can design the bearing with your requirements and use your own LOGO and package design.

US $50-70
/ Piece
|
1 Piece

(Min. Order)

###

Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: 1250mm
Material: Stainless Steel
Spherical: Non-Aligning Bearings
Load Direction: Axial and Radial Load

###

Customization:
US $50-70
/ Piece
|
1 Piece

(Min. Order)

###

Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: 1250mm
Material: Stainless Steel
Spherical: Non-Aligning Bearings
Load Direction: Axial and Radial Load

###

Customization:

How to Replace a Bearing

If you want to select a bearing for a specific application, you should know a few basics. This article will give you an overview of ball, angular contact, and sliding-contact bearings. You can choose a bearing according to the application based on the characteristics of its material and preload. If you are not sure how to choose a bearing, try experimenting with it. The next step is to understand the Z-axis, which is the axes along which the bearing moves.

Z axis

When it comes to replacing your Z axis bearing, there are several things you must know. First, you need to make sure that the bearings are seated correctly. Then, you should check the tension and rotation of each one. To ensure that both bearings are equally tensioned, you should flex the Core to the desired angle. This will keep the Z axis perpendicular to the work surface. To do this, first remove the Z axis bearing from its housing and insert it into the Z axis motor plate. Next, insert the flanged bearing into the Z axis motor plate and secure it with two M5x8mm button head cap screws.
Make sure that the bearing plate and the Z Coupler part are flush and have equal spacing. The spacing between the two parts is important, as too much spacing will cause the leadscrew to become tight. The screws should be very loose, with the exception of the ones that engage the nylocks. After installing the bearing, the next step is to start the Z axis. Once this is done, you’ll be able to move it around with a stepper.

Angular contact

bearing
Ball bearings are made with angular contacts that result in an angle between the bearing’s races. While the axial load moves in one direction through the bearing, the radial load follows a curved path, tending to separate the races axially. In order to minimize this frictional effect, angular contact bearings are designed with the same contact angle on the inner and outer races. The contact angle must be chosen to match the relative proportions of the axial and radial loads. Generally, a larger contact angle supports a higher axial load, while reducing radial load.
Ball bearings are the most common type of angular contact bearings. Angular contact ball bearings are used in many applications, but their primary purpose is in the spindle of a machine tool. These bearings are suitable for high-speed, precision rotation. Their radial load capacity is proportional to the angular contact angle, so larger contact angles tend to enlarge with speed. Angular contact ball bearings are available in single and double-row configurations.
Angular contact ball bearings are a great choice for applications that involve axial loads and complex shapes. These bearings have raceways on the inner and outer rings and mutual displacement along the axial axis. Their axial load bearing capacity increases as the contact Angle a rises. Angular contact ball bearings can withstand loads up to five times their initial weight! For those who are new to bearings, there are many resources online dedicated to the subject.
Despite their complexity, angular contact ball bearings are highly versatile and can be used in a wide range of applications. Their angular contact enables them to withstand moderate radial and thrust loads. Unlike some other bearings, angular contact ball bearings can be positioned in tandem to reduce friction. They also feature a preload mechanism that removes excess play while the bearing is in use.
Angular contact ball bearings are made with different lubricants and cage materials. Standard cages for angular contact ball bearings correspond to Table 1. Some are machined synthetic resins while others are molded polyamide. These cage materials are used to further enhance the bearing’s axial load capacity. Further, angular contact ball bearings can withstand high speeds and radial loads. Compared to radial contact ball bearings, angular contact ball bearings offer the greatest flexibility.

Ball bearings

bearing
Ball bearings are circular structures with two separate rings. The smaller ring is mounted on a shaft. The inner ring has a groove on the outer diameter that acts as a path for the balls. Both the inner and outer ring surfaces are finished with very high precision and tolerance. The outer ring is the circular structure with the rolling elements. These elements can take many forms. The inner and outer races are generally made of steel or ceramic.
Silicon nitride ceramic balls have good corrosion resistance and lightweight, but are more expensive than aluminum oxide balls. They also exhibit an insulating effect and are self-lubricating. Silicon nitride is also suitable for high-temperature environments. However, this type of material has the disadvantage of wearing out rapidly and is prone to cracking and shattering, as is the case with bearing steel and glass. It’s also less resistant to heat than aluminum oxide, so it’s best to buy aluminum nitride or ceramic ball bearings for applications that are subjected to extremely high temperatures.
Another type of ball bearings is the thrust bearing. It has a special design that accommodates forces in both axial and radial directions. It is also called a bidirectional bearing because its races are side-by-side. Axial ball bearings use a side-by-side design, and axial balls are used when the loads are transmitted through the wheel. However, they have poor axial support and are prone to separating during heavy radial loads.
The basic idea behind ball bearings is to reduce friction. By reducing friction, you’ll be able to transfer more energy, have less erosion, and improve the life of your machine. With today’s advances in technology, ball bearings can perform better than ever before. From iron to steel to plastics, the materials used in bearings have improved dramatically. Bearings may also incorporate an electromagnetic field. So, it’s best to select the right one for your machine.
The life expectancy of ball bearings depends on many factors, including the operating speed, lubrication, and temperature. A single million-rpm ball bearing can handle between one and five million rotations. As long as its surface contact area is as small as possible, it’s likely to be serviceable for at least one million rotations. However, the average lifespan of ball bearings depends on the application and operating conditions. Fortunately, most bearings can handle a million or more rotations before they start showing signs of fatigue.

Sliding-contact bearings

bearing
The basic principle behind sliding-contact bearings is that two surfaces move in contact with one another. This type of bearing works best in situations where the surfaces are made of dissimilar materials. For instance, a steel shaft shouldn’t run in a bronze-lined bore, or vice versa. Instead, one element should be harder than the other, since wear would concentrate in that area. In addition, abrasive particles tend to force themselves into the softer surface, causing a groove to wear in that part.
Sliding-contact bearings have low coefficients of friction and are commonly used in low-speed applications. Unlike ball and roller bearings, sliding contact bearings have to be lubricated on both sides of the contacting surfaces to minimize wear and tear. Sliding-contact bearings generally are made of ceramics, brass, and polymers. Because of their lower friction, they are less accurate than rolling-element bearings.
Sliding-contact bearings are also known as plain or sleeve bearings. They have a sliding motion between their two surfaces, which is reduced by lubrication. This type of bearing is often used in rotary applications and as guide mechanisms. In addition to providing sliding action, sliding-contact bearings are self-lubricating and have high load-carrying capacities. They are typically available in two different types: plain bearings and thrust bearings.
Sliding-contact linear bearing systems consist of a moving structure (called the carriage or slide) and the surfaces on which the two elements slide. The surfaces on which the bearing and journal move are called rails, ways, or guides. A bore hole is a complex geometry, and a minimum oil film thickness h0 is usually used at the line of centers. It is possible to have a sliding-contact bearing in a pillow block.
Because these bearings are porous, they can absorb 15 to 30% of the lubrication oil. This material is commonly used in automobile and machine tools. Many non-metallic materials are used as bearings. One example is rubber, which offers excellent shock absorbency and embeddability. While rubber has poor strength and thermal conductivity, it is commonly used in deep-well pumps and centrifugal pumps. This material has high impact strength, but is not as rigid as steel.

China Large Size Bearing/Turntable Bearing/Internal Gear Slewing Ring Bearing/Yrt Bearing/Cross Roller Bearing for Deck Crane, Wind Power and Machinery Construction     with Good qualityChina Large Size Bearing/Turntable Bearing/Internal Gear Slewing Ring Bearing/Yrt Bearing/Cross Roller Bearing for Deck Crane, Wind Power and Machinery Construction     with Good quality
editor by czh 2022-12-01

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