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
Samples:
US$ 400/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

slewing bearing

What is the Typical Lifespan of Slewing Bearings under Different Operating Conditions?

The lifespan of slewing bearings can vary based on different operating conditions and factors that influence wear and fatigue. Here’s a general overview of the typical lifespan under various scenarios:

  • Light Loads and Proper Lubrication:

When operating under light axial, radial, and moment loads and with consistent and proper lubrication, slewing bearings can often exceed 20,000 to 30,000 hours of service life.

  • Heavy Loads and Harsh Environments:

In heavy-duty applications where the bearings handle substantial loads, such as construction equipment or mining machinery, the lifespan might range from 10,000 to 20,000 hours. Harsh environments with dust, moisture, and corrosive substances can affect the bearing’s durability.

  • Corrosive Environments:

In environments with high levels of corrosion, such as marine applications, the lifespan of slewing bearings might be reduced due to the impact of corrosive elements on the bearing’s materials.

  • High-Speed Applications:

In applications requiring high rotational speeds, such as certain automation systems or machinery, the bearing’s lifespan might be affected due to increased friction and wear associated with higher speeds.

  • Poor Lubrication and Maintenance:

If proper lubrication and maintenance practices are neglected, the bearing’s lifespan can be significantly shortened. Insufficient lubrication leads to increased friction and wear, potentially reducing the lifespan by a considerable margin.

  • Shock and Impact Loads:

Applications subject to frequent shock and impact loads, like certain material handling equipment, can experience premature wear and fatigue, leading to a reduced lifespan.

  • Temperature Extremes:

Operating in extreme temperatures, whether high or low, can affect the performance of slewing bearings and potentially reduce their lifespan due to changes in material properties and lubrication effectiveness.

  • Customization and Quality:

The quality of the bearing, manufacturing processes, and the extent of customization also play a role. High-quality bearings designed for specific applications might offer longer lifespans.

  • Manufacturer’s Recommendations:

Always refer to the manufacturer’s guidelines and recommendations for the specific slewing bearing model. They provide valuable insights into maintenance intervals, lubrication, and expected service life.

It’s important to note that these are general estimates, and actual lifespans can vary depending on numerous factors. Regular maintenance, proper lubrication, adherence to guidelines, and consideration of operating conditions are essential for maximizing the lifespan of slewing bearings.

slewing bearing

What are the Signs of a Damaged or Worn-out Slewing Bearing that Requires Replacement?

Identifying the signs of a damaged or worn-out slewing bearing is essential for preventing potential failures and ensuring equipment reliability. Here are common indicators that a slewing bearing may require replacement:

  • Unusual Noise:

If you notice grinding, clicking, or any abnormal noises during operation, it could be a sign of wear or misalignment in the slewing bearing.

  • Increased Vibration:

Excessive vibration or shaking during rotation could indicate misalignment, damage, or uneven wear in the slewing bearing.

  • Irregular Movement:

If the machinery exhibits irregular or jerky movement instead of smooth rotation, it might be due to a damaged slewing bearing.

  • Uneven Load Distribution:

Uneven distribution of loads can lead to accelerated wear on specific sections of the bearing, causing premature failure.

  • Abnormal Heat Generation:

If the slewing bearing becomes excessively hot during operation, it may suggest friction, misalignment, or lack of proper lubrication.

  • Excessive Play or Clearance:

Too much axial or radial play in the bearing can indicate wear, misalignment, or component fatigue, requiring inspection and potential replacement.

  • Leakage of Lubricant:

If lubricant leaks from the bearing or seals, it may signify damage to the sealing mechanism or an internal issue that needs attention.

  • Visible Wear or Damage:

Inspect the bearing for visible signs of wear, corrosion, pitting, or other forms of damage. Cracks, dents, or deformation are clear indicators of potential problems.

  • Reduced Performance:

If the machinery’s performance deteriorates, such as decreased rotation speed, reduced load capacity, or increased power consumption, it could be due to a failing slewing bearing.

  • Increased Maintenance Frequency:

If you find yourself needing to perform more frequent maintenance or repairs on the bearing, it might indicate that the bearing is nearing the end of its service life.

  • Manufacturer’s Service Life:

Consult the manufacturer’s guidelines for the expected service life of the slewing bearing. If the bearing is approaching this limit, it’s advisable to consider replacement.

If any of these signs are observed, it’s important to consult with experts and consider replacing the slewing bearing to prevent further damage and ensure the safe and efficient operation of machinery.

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