Product Description

CZPT is a professional manufacturer in slewing ring bearings since 1993. We can also design and make other standard and non-standard ball slewing ring bearings, roller slewing bearings and precision slewing ring bearings as per customer’s different technical requirements.

Slewing ring bearing is also called slewing ring, slewing bearing, turntable bearing, and rotary bearing.
Slewing ring bearing is a bearing that CZPT to bear axial load, radial load and overturning torque. Under normal circumstances, slewing ring bearings have their own mounting holes, lubricant holes and seal holes, to meet the different needs of the various host working under the various conditions;

On the other hand, slewing ring bearing itself has characteristics of compact structure, CZPT rotating convenient, easy to install and maintaining easily.

Slewing Ring Bearings——Types:
1.       4 point contact ball slewing ring bearings
2.       double row ball 4 point contact slewing ring bearings(same diameter ball; different diameter ball)
3.       cross roller slewing ring bearings
4.       triple row cylindrical roller combined slewing ring bearings
5.       ball roller combined slewing ring bearings
6.       light flanged slewing ring bearings

Slewing Ring Bearings——Technical Data:
1.       Material: 42CrMo, 50Mn
2.       Precision: P0. P6. P5.
3.       Outside diameter: 200~9500mm
4.       Cage/retainer: Nylon or aluminum
5.       Gear type: non-geared, internal gear and external gear, gear hardened

Slewing Ring Bearings——Applications:
Slewing ring bearings are widely used in industry and known as “the machine joints”
Hereunder is the specific slewing bearing applications
1. Construction machinery (e.g. cranes, excavators, loader, scraper)
2. Metallurgical machinery (e.g. for steel plant)
3. Heavy machinery equipments (e.g. mining machinery, concrete machinery)
4. Marine machinery equipment (e.g. vessel, port hoisting machine, port oil transfer equipment, onshore and offshore crane)
5. Light machinery equipments (e.g. paper machine, plastic, rubber machine, weave machine)
6. Wind power generator
7. Military products (e.g. aerospace machinery)
8. Packing machinery

Slewing Ring Bearings——Packaging Details:
Step 1: Covered with the anti-rust oil
Step 2: wrapped with the plastic film;
Step 3: Packed with Kraft paper and professional belts;
Step 4: Put into wooden box to avoid the rust or the moist;
Remark: Normally, plastic film+ Kraft +belt+ wooden box, but customized packing available,

Our Advantages:
1. Good quality and competitive price
2. Trial order accepted
3. ISO certified company
4. OEM and ODM accepted
5. Manufacturing slewing ring bearings since 2000

CZPT Slewing bearing models:

Bearing ungeared
230.20.0400.013 (Type 21/520.0) 230.20.0400.503 (Type 21/520.0) 230.21.571.013 (Type 21/520.0) 280.30.0900.013 (Type 110/1100.0) 280.30. 0571 .013 (Type 110/1100.0)
230.20.0500.013 (Type 21/650.0) 230.20.0500.503 (Type 21/650.0) 230.21.571.013 (Type 21/650.0) 280.30.1000.013 (Type 110/1200.0) 280.30.1075.013 (Type 110/1200.0)
230.20.0600.013 (Type 21/750.0) 230.20.0600.503 (Type 21/750.0) 230.21.0675.013 (Type 21/750.0) 280.30.1100.013 (Type 110/1300.0) 280.30.1175.013 (Type 110/1300.0)
230.20.0700.013 (Type 21/850.0) 230.20.0700.503 (Type 21/850.0) 230.21.571.013 (Type 21/850.0) 280.30.1200.013 (Type 110/1400.0) 280.30.1275.013 (Type 110/1400.0)
230.20.0800.013 (Type 21/950.0) 230.20.0800.503 (Type 21/950.0) 230.21. 0571 .013 (Type 21/950.0) 280.30.1300.013 (Type 110/1500.0) 280.30.1375.013 (Type 110/1500.0)
230.20.0900.013 (Type 21/1050.0) 230.20.0900.503 (Type 21/1050.0) 230.21. 0571 .013 (Type 21/1050.0) 280.30.1400.013 (Type 110/1600.0) 280.30.1475.013 (Type 110/1600.0)
230.20.1000.013 (Type 21/1200.0) 230.20.1000.503 (Type 21/1200.0) 230.21.1075.013 (Type 21/1200.0)    
Bearing with external gear
231.20.0400.013 (Type 21/520.1) 231.20.0400.503 (Type 21/520.1) 231.21.571.013 (Type 21/520.1) 281.30.0900.013 (Type 110/1100.1) 281.30. 0571 .013 (Type 110/1100.1)
231.20.0500.013 (Type 21/650.1) 231.20.0500.503 (Type 21/650.1) 231.21.571.013 (Type 21/650.1) 281.30.1000.013 (Type 110/1200.1) 281.30.1075.013 (Type 110/1200.1)
231.20.0600.013 (Type 21/750.1) 231.20.0600.503 (Type 21/750.1) 231.21.0675.013 (Type 21/750.1) 281.30.1100.013 (Type 110/1300.1) 281.30.1175.013 (Type 110/1300.1)
231.20.0700.013 (Type 21/850.1) 231.20.0700.503 (Type 21/850.1) 231.21.571.013 (Type 21/850.1) 281.30.1200.013 (Type 110/1400.1) 281.30.1275.013 (Type 110/1400.1)
231.20.0800.013 (Type 21/950.1) 231.20.0800.503 (Type 21/950.1) 231.21. 0571 .013 (Type 21/950.1) 281.30.1300.013 (Type 110/1500.1) 281.30.1375.013 (Type 110/1500.1)
231.20.0900.013 (Type 21/1050.1) 231.20.0900.503 (Type 21/1050.1) 231.21. 0571 .013 (Type 21/1050.1) 281.30.1400.013 (Type 110/1600.1) 281.30.1475.013 (Type 110/1600.1)
231.20.1000.013 (Type 21/1200.1) 231.20.1000.503 (Type 21/1200.1) 231.21.1075.013 (Type 21/1200.1)    
Bearing with internal gear
232.20.0400.013 (Type 21/520.2) 232.20.0400.503 (Type 21/520.2) 232.21.571.013 (Type 21/520.2) 282.30.0900.013 (Type 110/1100.2) 282.30. 0571 .013 (Type 110/1100.2)
232.20.0500.013 (Type 21/650.2) 232.20.0500.503 (Type 21/650.2) 232.21.571.013 (Type 21/650.2) 282.30.1000.013 (Type 110/1200.2) 282.30.1075.013 (Type 110/1200.2)
232.20.0600.013 (Type 21/750.2) 232.20.0600.503 (Type 21/750.2) 232.21.0675.013 (Type 21/750.2) 282.30.1100.013 (Type 110/1300.2) 282.30.1175.013 (Type 110/1300.2)
232.20.0700.013 (Type 21/850.2) 232.20.0700.503 (Type 21/850.2),  232.21.571.013 (Type 21/850.2) 282.30.1200.013 (Type 110/1400.2) 282.30.1275.013 (Type 110/1400.2)
232.20.0800.013 (Type 21/950.2) 232.20.0800.503 (Type 21/950.2) 232.21. 0571 .013 (Type 21/950.2) 282.30.1300.013 (Type 110/1500.2) 282.30.1375.013 (Type 110/1500.2)
232.20.0900.013 (Type 21/1050.2) 232.20.0900.503 (Type 21/1050.2) 232.21. 0571 .013 (Type 21/1050.2) 282.30.1400.013 (Type 110/1600.2) 282.30.1475.013 (Type 110/1600.2)
232.20.1000.013 (Type 21/1200.2) 232.20.1000.503 (Type 21/1200.2) 232.21.1075.013 (Type 21/1200.2)    

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Standard or Nonstandard: Standard
Feature: Cold-Resistant, Corrosion-Resistant, Heat-Resistant
Sealing Gland: Sealed On One Side
Rolling-Element Number: Single-Row
Roller Type: Deep Groove Raceway
Material: 50mn 42CrMo
US$ 400/Piece
1 Piece(Min.Order)

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Customized Request

slewing bearing

Can you Explain the Concept of Axial and Radial Load Capacity in Slewing Bearings?

The axial and radial load capacities are fundamental parameters that define the ability of slewing bearings to withstand different types of loads along different directions. Here’s an explanation of these concepts:

  • Axial Load Capacity:

The axial load capacity of a slewing bearing refers to its ability to withstand loads that act parallel to the axis of rotation. In other words, it’s the maximum force that can be applied along the vertical or horizontal axis without causing significant deformation or failure of the bearing components.

For example, in applications where the bearing supports vertical loads like those encountered in cranes or excavators, the axial load capacity is crucial to ensure the stability and safety of the equipment. Slewing bearings designed for high axial load capacities have sturdy components and optimized raceway profiles to distribute the load evenly and prevent stress concentrations.

  • Radial Load Capacity:

The radial load capacity of a slewing bearing pertains to its ability to withstand loads that act perpendicular to the axis of rotation. These loads are directed toward or away from the center of the bearing. Radial loads can result from weight, force, or moments acting perpendicular to the axis of rotation.

For instance, in applications involving cantilevered structures, the radial load capacity is essential to support the bending moments and forces applied to the bearing. Slewing bearings with high radial load capacities are designed to handle these loads without excessive deformation, minimizing wear and maintaining operational integrity.

  • Combined Load Situations:

Real-world applications often involve combinations of axial and radial loads. Slewing bearings must be selected and designed to handle these combined loads effectively. Engineers consider both axial and radial load capacities to ensure that the bearing can safely operate under the expected loading conditions.

Manufacturers provide load rating charts and data that specify the maximum axial and radial loads a slewing bearing can handle. Engineers use this information to make informed decisions about bearing selection for various applications.

In summary, the axial and radial load capacities of slewing bearings are essential parameters that determine their ability to withstand specific types of loads in various directions. Proper consideration of these capacities ensures safe and reliable operation in diverse applications.

slewing bearing

What are the Common Maintenance Practices for Ensuring the Durability of Slewing Bearings?

Maintaining slewing bearings is crucial for ensuring their longevity and optimal performance. Here are some common maintenance practices to enhance the durability of slewing bearings:

  • Regular Inspection:

Perform routine visual inspections to check for signs of wear, corrosion, and damage. Inspect seals, lubrication levels, and any unusual noises or vibrations during operation.

  • Lubrication:

Follow the manufacturer’s guidelines for lubrication intervals and use appropriate lubricants. Lubricate the bearings to ensure smooth operation, reduce friction, and prevent wear.

  • Seal Maintenance:

Inspect and maintain seals to prevent the ingress of contaminants such as dust, dirt, and moisture. Damaged or worn seals should be replaced promptly.

  • Cleaning:

Regularly clean the bearing and its surrounding area to remove dirt, debris, and contaminants that could affect performance. Keep the bearing environment as clean as possible.

  • Environmental Protection:

If the bearings are exposed to harsh conditions, consider using protective covers or shields to prevent direct exposure to elements like water, chemicals, and abrasive materials.

  • Alignment and Mounting:

Ensure proper alignment during installation to prevent unnecessary stress on the bearing. Accurate mounting reduces the risk of misalignment-related failures.

  • Torque Monitoring:

If the bearing has gears, regularly monitor and maintain the torque levels to prevent overloading and premature wear.

  • Load Distribution:

Operate the machinery within the specified load limits to avoid overloading the bearing, which can lead to fatigue and failure.

  • Replacement of Worn Components:

If any components, such as seals or lubrication fittings, show signs of wear, replace them promptly to maintain the integrity of the bearing system.

  • Documentation:

Maintain records of maintenance activities, including lubrication schedules, inspections, and any repairs or replacements. This documentation helps track the bearing’s history and aids in decision-making.

  • Training:

Ensure that maintenance personnel are adequately trained to carry out proper inspection, lubrication, and maintenance procedures.

By implementing these maintenance practices, you can maximize the service life of slewing bearings, minimize downtime, and maintain consistent machinery performance.

slewing bearing

Can you Explain the Differences Between Single-Row and Double-Row Slewing Bearings?

Single-row and double-row slewing bearings are two common configurations with distinct characteristics. Here are the key differences between them:

  • Design:

A single-row slewing bearing consists of one row of rolling elements positioned between the inner and outer rings. In contrast, a double-row slewing bearing has two rows of rolling elements.

  • Load-Carrying Capacity:

Double-row slewing bearings generally have a higher load-carrying capacity compared to single-row bearings. The presence of two rows of rolling elements enables them to handle heavier axial, radial, and moment loads.

  • Stiffness:

Double-row bearings offer higher stiffness due to the additional row of rolling elements. This stiffness can be advantageous in applications where precise positioning and resistance to deflection are crucial.

  • Compactness:

Single-row slewing bearings are typically more compact and have a smaller profile compared to double-row bearings. This compact design can be advantageous in applications with limited space.

  • Cost:

Single-row slewing bearings are generally more cost-effective compared to double-row bearings. The increased complexity and higher load capacity of double-row bearings can result in higher manufacturing costs.

  • Applications:

Single-row slewing bearings are suitable for applications with moderate loads and rotational requirements, where compactness is important. Examples include small cranes, excavators, and material handling equipment. Double-row slewing bearings are often used in larger and heavier machinery, such as construction equipment, wind turbines, and heavy-duty cranes.

  • Performance Trade-offs:

While double-row bearings offer higher load capacity and stiffness, they may also introduce higher friction and slightly reduced rotational efficiency compared to single-row bearings due to the presence of additional rolling elements.

In summary, the choice between single-row and double-row slewing bearings depends on factors like load requirements, available space, and desired stiffness. Each configuration has its own advantages and trade-offs, allowing engineers to tailor their selection to the specific needs of the application.

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editor by CX 2024-05-14