Product Description

1. Company introduction 

HangZhou King Slewing Bearing Technology Co.,Ltd.is a professional manufacturer and exporter of excavator slewing rings, its factory is located in HangZhou city, ZheJiang Province,very close to ZheJiang Port, goods can be easily transported all over the world.

Our main product is excavator slewing rings, we can now produce more than 1000 part numbers to match with many famous excavator brands, such as CATERPILLAR, KOMATSU, HITACHI, KOBELCO, HYUNDAI, VOLVO, DOOSAN, LIEBHERR, DAEWOO, JCB,CASE, SUMITOMO, KATO,etc. 

Our engineers have more than 20 years rich experience in studying excavator slewing rings and we have professional measuring team can go to customers ‘ workplace  to measure the old or broken slewing rings, then to produce the same replacements. We have our own factory with latest CNC machines , such as vertical lathes, gear hobbing machines, gear shaping machines, hole drilling mahines, quenching machines, vertical grinding machines, turning machines,etc. to meet customers’ quick delivery requirements. 

We will adhere to the “quality first, credibility first” business philosophy and continually provide our clients with superior quality products and services. We warmly welcome customers from all over the world to visit us and together to build a better future !

2. Our slewing rings can match with more than 1000 excavator models. 

3. Our excavator part numbers as below:

Doosan Slewing Ring Replacement 
Excavator model number Part number Excavator model number Part number
S140LC-V  109-00165  255lc-v  145719-00043
SOLAR55-VPLUS 109-00149 300-v   109-00157
DH220LC  145719-00048A DX300LCA   145719-0571
DX225 109-00162 Dx300LCA   145719-0571A 
DX225LC   109-00162A S340  145719-00038
DX225LC  109-00162 S340LC-V 145719-00038
DX225LCA 109-00162A S340LC-V  2109-1059A                  (New Part Number)
DX225LCA 145719-00048 S400LC-3 2109-9047A
S225NLC-V 145719-00045 DOOSAN 420  145719-00039
SL220LC-V  109-00052 S420LC-V  109-00161
225NLC-V 109-00052B DX420LC  K15719
225NLC-V 145719-00045 DX420LC    109-00046
255LC-V 109-00030B DX420LC   145719-00007A
255LC-V   180-5717D3 470 109-00159
255lc-v  145719-00042 SOLAR 500LC-V   145719-00040

4. Our excavator slewing ring pictures

5. Our slewing bearing packaging pictures 

6. Transportation way: By sea/ air/ rail/ road/ TNT/DHL/UPS/Fedex,ect. 

7. Contact information
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Standard or Nonstandard: Standard
Feature: Short Delivery Time
Sealing Gland: We Use Seal Rings
Rolling-Element Number: Single Row, Three Row for Huge Slewing Bearing
Roller Type: Four Point Contact
Material: Alloy Steel
Samples:
US$ 2100/Set
1 Set(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

slewing bearing

What Role do Seals and Enclosures Play in Protecting Slewing Bearings from Contaminants?

Seals and enclosures play a crucial role in safeguarding slewing bearings from contaminants, moisture, and other external factors that can lead to premature wear and damage. Here’s how seals and enclosures contribute to the protection of slewing bearings:

  • Contaminant Exclusion:

Seals and enclosures create a physical barrier that prevents contaminants like dust, dirt, sand, and particles from entering the bearing’s internal components. This exclusion minimizes abrasive wear and preserves the integrity of the rolling elements and raceways.

  • Moisture and Corrosion Prevention:

Seals and enclosures provide a shield against moisture and water ingress, crucial in preventing corrosion and rust formation on bearing surfaces. Corrosion-resistant seals are particularly valuable in marine and humid environments.

  • Chemical and Chemical Vapor Resistance:

Specialized seals and enclosures can offer resistance to chemicals, acids, and corrosive substances that might be present in the operating environment. This protection prevents chemical damage to the bearing’s components.

  • Lubrication Retention:

Seals and enclosures help retain the lubricant within the bearing, preventing it from leaking out and ensuring consistent lubrication for smooth operation. This is essential for reducing friction and wear.

  • Prevention of Solid Particle Contamination:

Seals and enclosures block solid particles from entering the bearing chamber, reducing the risk of particle-induced wear, surface damage, and premature failure.

  • Temperature Regulation:

Some seals and enclosures offer thermal insulation, which helps regulate the operating temperature of the bearing. This can be crucial in applications with extreme temperature variations.

  • Enhanced Longevity:

By protecting the bearing from contaminants and adverse environmental conditions, seals and enclosures contribute to the extension of the bearing’s operational life, reducing the need for frequent replacements.

  • Sealing Types:

Seals can come in various types, including lip seals, labyrinth seals, and specialized designs. The choice of seal depends on the application’s requirements and the level of protection needed.

  • Proper Installation and Maintenance:

Proper installation and regular inspection of seals and enclosures are essential to ensure their effectiveness. Damaged or worn seals should be promptly replaced to maintain protection.

In summary, seals and enclosures serve as a critical defense mechanism for slewing bearings against contaminants, moisture, and harmful substances. They contribute to the bearing’s reliability, performance, and overall longevity in various operating environments.

slewing bearing

How does Preload Affect the Performance and Stability of Slewing Bearings?

Preload is a critical factor that can significantly impact the performance and stability of slewing bearings. It involves applying a controlled axial force to the bearing components before assembly. Here’s how preload affects slewing bearings:

  • Reduced Internal Clearance:

Applying preload reduces the internal clearance between the rolling elements and raceways. This minimizes play or clearance in the bearing, enhancing its rigidity and reducing the potential for rolling element skidding during operation.

  • Improved Stiffness:

Preloaded slewing bearings exhibit higher stiffness due to the elimination of internal clearance. This improved stiffness is crucial in applications requiring precise positioning, such as robotics and high-precision machinery.

  • Enhanced Load Distribution:

Preload improves the load distribution among rolling elements, minimizing stress concentrations and promoting uniform load sharing. This is especially important in applications with varying loads and forces.

  • Reduced Vibrations:

By eliminating internal clearance and minimizing rolling element movements, preloaded bearings experience reduced vibrations during operation. This contributes to smoother and more stable equipment performance.

  • Precise Positioning:

Preload ensures minimal movement within the bearing during rotational changes, making it suitable for applications where precise positioning and accurate motion control are essential.

  • Resistance to External Loads:

Preloaded bearings are better equipped to handle external forces and shocks without significant deformation or misalignment, maintaining consistent performance even under varying conditions.

  • Reduced Wear:

With reduced internal clearance and controlled movement, preloaded bearings experience less wear and fatigue. This extends their service life and reduces the frequency of maintenance.

  • Limitations:

However, excessive preload can lead to increased friction, heat generation, and potential damage. It’s essential to apply the right amount of preload according to manufacturer recommendations and application requirements.

In summary, preload in slewing bearings enhances rigidity, load distribution, and stability, making them suitable for applications that demand precise movement and control. Properly applied preload ensures optimal performance and extends the operational life of the bearing.

slewing bearing

What are the Materials Commonly Used in Manufacturing Slewing Bearings and Their Respective Benefits?

Slewing bearings are manufactured using a variety of materials, each offering specific benefits that suit different industrial applications. Some common materials and their advantages include:

  • Steel:

High-quality steel, such as chrome or stainless steel, is widely used due to its durability, strength, and resistance to corrosion. Steel bearings can handle heavy loads and offer excellent wear resistance, making them suitable for heavy-duty applications.

  • Forged Steel:

Forged steel is even more robust than standard steel due to the manufacturing process that aligns the grain structure. This material is suitable for applications with extreme loads, harsh environments, and high impact forces.

  • Bearing Steel:

Bearing steel, designed specifically for rolling-element bearings, provides superior hardness and wear resistance. It’s commonly used in slewing bearings to extend their service life and minimize wear.

  • Alloy Steel:

Alloy steels offer a combination of strength, toughness, and corrosion resistance. They are suitable for applications that require both load-bearing capacity and resistance to challenging conditions.

  • Cast Iron:

Cast iron is often used in smaller, low-load slewing bearings. It provides good damping properties and is cost-effective for less demanding applications.

  • Bronze:

Bronze bearings are known for their self-lubricating properties and resistance to corrosion. They are commonly used in applications where maintenance-free operation and low friction are important.

  • Plastics and Polymers:

Various plastics and polymers are employed for their lightweight, corrosion resistance, and low friction characteristics. These materials are suitable for applications that require chemical resistance and reduced noise levels.

  • Ceramics:

Ceramic materials offer excellent corrosion resistance, high temperature resistance, and electrical insulation properties. While less common, they are used in specialized applications like semiconductor manufacturing and certain medical equipment.

  • Coatings:

Special coatings like zinc, nickel, or chrome plating can be applied to enhance corrosion resistance and reduce friction. These coatings are often used in combination with other base materials to improve performance.

Choosing the appropriate material depends on factors like load, environment, operating conditions, and maintenance requirements. Engineers carefully consider these factors to ensure that the selected material aligns with the specific needs of the application.

China Hot selling CZPT Dx420LC Excavator Slewing Ring Bearing K1003129 Used for Excavator   bearing blockChina Hot selling CZPT Dx420LC Excavator Slewing Ring Bearing K1003129 Used for Excavator   bearing block
editor by CX 2024-05-15

Slewing bearings

As one of the slewing bearings manufacturers, suppliers, and exporters of mechanical products, We offer slewing bearings and many other products.

Please get in touch with us for details.

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