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. 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 1993

Slewing bearing——Surface treatment:
1: black surface treatment
2: Surface sandblasting and painting
3: Surface chrome plating
4: Surface spray zinc treatment
5: Surface phosphating treatment
6: Dacromet treatment

Slewing Ring- Seal 
The sealing of slewing bearing is mainly to prevent the filled grease from leaking out, and also to prevent external dust, impurities and moisture from entering the inside of the bearing and affecting the normal operation of the bearing.

Since most of the slewing bearings work under heavy loads and low speeds, the sealing form of the bearings adopts 2 structures: rubber seal ring seal and labyrinth seal. The rubber sealing ring itself has a simple structure, small space occupation and reliable sealing performance. The disadvantage is that it is prone to early aging under high temperature conditions and loss of airtightness. Therefore, under high temperature conditions, the slewing bearing should adopt a labyrinth seal. In addition, the material of the sealing ring under high temperature is high temperature resistant fluoro rubber.

Slewing ring bearing- Maintain
1. The slewing bearing should be greased regularly. According to different types of slewing bearings, the specific grease filling time is as follows: the ball type is filled with grease every 100 hours of operation; the roller type is filled with grease every 50 hours of operation .

2. The sundries on the surface of the slewing ring should be removed frequently during use, and the sealing strip of the slewing ring should be checked for aging, cracking, damage or separation. If 1 of these conditions occurs, the sealing strip should be replaced in time to prevent debris from entering the raceway and the loss of grease.

Pay close attention to the operation of the slewing ring during use. If you find that the noise, impact, or power suddenly increases, you should stop the machine immediately for inspection until all the faults are eliminated, and disassemble and inspect if necessary.

LYHY Slewing bearing models:
Four Contact Ball Slewing Bearing Without Gear:

Model WEIGHT DIMENSIONS FASTENING GEARS Resistance
Kg De Di Be Fe Ne Fi Ni m z D kN
32 505 304 368 455 10 332 12 5 99 495 33.8
44 640 434 498 585 14 462 14 6 105 630 41
52 742 534 598 685 16 562 16 6 122 732 41
60 840 634 698 785 18 662 16 6 138 828 41
68 950 734 798 885 18 762 18 8 117 936 55
76 1046 834 898 985 20 835 20 8 129 1032 55
86 1198 984 1048 1135 22 1012 20 8 148 1184 55

 

Model WEIGHT DIMENSIONS FASTENING GEARS Resistance
Kg De Di Be Fe Ne Fi Ni m z D kN
31 518 325 454 490 8 375 12 5 67 335 32.4
41 648 445 584 620 10 505 16 6 76 456 40.3
48 748 546 684 720 12 605 18 6 93 558 40.3
55 848 649 784 820 12 705 20 6 110 660 40.3
63 948 736 884 920 14 805 20 8 94 752 54.3
71 1048 840 984 1571 16 905 22 8 107 856 54.3
80 1198 986 1134 1170 16 1055 24 8 125 1000 54.3

 

Model WEIGHT DIMENSIONS FASTENING
Kg De Di Be Bi Fe Ne Fi Ni
23 518 304 454 368 490 8 332 12
34 648 434 584 498 620 10 462 14
40 748 534 684 598 720 12 562 16
46 848 634 784 698 820 12 662 16
52 948 734 884 798 920 14 762 18
58 1048 834 984 898 1571 16 862 20
67 1198 984 1134 1048 1170 16 1012 20

Model WEIGHT DIMENSIONS FASTENING GEARS Resistance
Kg De Di Ce Ci Fe Ne Fi Ni M Z D kN
32 505 342 412.2 344 455 20 368 24 5 99 495 33.8
46 640 472 542.5 474 585 28 498 32 6 105 630 41
55 742 572 642 574 685 32 598 36 6 122 732 41
62 840 672 743 674 785 36 698 40 6 138 828 41
71 950 772 842 774 885 36 798 40 8 117 936 55
78 1046 872 943 874 985 40 898 44 8 129 1032 55
91 1198 1571 1094 1571 1135 44 1048 48 8 148 1184 55

Model WEIGHT DIMENSIONS FASTENING GEARS Resistance
Kg De Di Ce Ci Fe Ne Fi Ni M z D kN
31 486 325 484 409.5 460 24 375 24 5 67 335 32.4
43 616 445 614 539.5 590 32 505 32 6 76 456 40.3
51 716 546 714 639 690 36 605 36 6 93 558 40.3
58 816 649 814 739.7 790 40 705 40 6 110 660 40.3
70 916 736 914 840 890 40 805 40 8 94 752 54.3
76 1016 840 1014 939 990 44 905 44 8 107 856 54.3
92 1166 986 1164 1089 1140 48 1055 48 8 125 1000 54.3

 

REFERENCE WEIGHT DIMENSIONS FASTENING
Kg De Di Ce Ci Fe Ne Fi Ni
29 486 342 484 344 460 24 368 24
38 616 472 614 474 590 32 498 32
45 716 572 714 574 690 36 598 36
52 816 672 814 674 790 40 698 40
60 916 772 914 774 890 40 798 40
67 1016 872 1014 874 990 44 898 44
78 1166 1571 1164 1571 1140 48 1048 42

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Standard or Nonstandard: Standard
Feature: High Speed, Cold-Resistant, Corrosion-Resistant, Heat-Resistant
Sealing Gland: Sealed On Both Sides
Rolling-Element Number: Single-Row
Roller Type: Deep Groove Raceway
Material: 50mn 42CrMo
Samples:
US$ 100/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

slewing bearing

Are there any Specific Design Considerations when Using Slewing Bearings in Heavy-Duty Applications?

When utilizing slewing bearings in heavy-duty applications, several specific design considerations are essential to ensure reliable performance, safety, and longevity. Here are key factors to keep in mind:

  • Bearing Selection:

Choose slewing bearings with higher load-carrying capacities that are specifically designed for heavy loads. Opt for designs that distribute loads evenly and minimize stress concentrations.

  • Load Distribution:

Heavy-duty applications often involve uneven load distribution due to various operational conditions. Bearing designs should account for these variations to prevent premature wear and failure.

  • Material Selection:

Select materials that can withstand heavy loads, shock loads, and potential impacts without deformation or fatigue. High-strength steels and advanced materials with excellent mechanical properties are often preferred.

  • Rolling Element Size and Quantity:

Increase the size and quantity of rolling elements to distribute heavy loads more effectively. Larger and more rolling elements can handle higher forces while reducing stress on individual elements.

  • Lubrication and Sealing:

Heavy-duty applications generate more heat and friction. Use appropriate lubrication methods and consider advanced sealing solutions to ensure proper lubricant retention and prevent contamination.

  • Mounting and Alignment:

Ensure accurate mounting and alignment to prevent unnecessary stress on the bearing components. Misalignment can lead to premature wear and reduced bearing life.

  • Structural Integration:

Integrate the slewing bearing into the overall machine design, considering factors like structural support, load paths, and interfaces with other components.

  • Dynamic Loading:

Heavy-duty applications often involve dynamic loading scenarios. Consider factors such as impact loads, acceleration, and deceleration when designing the bearing and its supports.

  • Heat Dissipation:

Heavy loads and continuous operation can generate heat. Design the bearing housing and cooling systems to dissipate heat effectively and prevent overheating.

  • Maintenance Access:

Design the bearing arrangement to allow for convenient maintenance and inspections. Access to lubrication points, seals, and other components should be easy to facilitate regular upkeep.

  • Load Surges and Shock Absorption:

Heavy-duty applications might experience sudden load surges or impacts. Incorporate shock-absorbing mechanisms or dampers to protect the bearing from excessive forces.

In summary, heavy-duty applications demand careful consideration of bearing selection, materials, load distribution, lubrication, and other design elements to ensure the reliable and durable performance of slewing bearings under substantial loads.

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

What is a Slewing Bearing and How Does It Work?

A slewing bearing, also known as a turntable bearing, is a specialized type of rolling-element bearing designed to handle axial, radial, and moment loads simultaneously. It allows rotational movement between two parts while supporting the loads applied to them. Slewing bearings are commonly used in various applications such as cranes, construction equipment, wind turbines, and industrial machinery.

At its core, a slewing bearing consists of multiple components, including an outer ring, an inner ring, rolling elements (balls or rollers), and in some designs, a gear or teeth arrangement. The outer ring is typically stationary and mounted to a fixed structure, while the inner ring is connected to the rotating part. The rolling elements provide smooth movement between the two rings, enabling rotation.

Slewing bearings work by minimizing friction and distributing loads effectively across the rolling elements. When a rotational force is applied to the inner ring, the rolling elements facilitate the smooth rotation of the inner ring relative to the outer ring. The rolling elements are positioned within raceways or grooves in the rings, ensuring proper contact and load distribution.

The addition of gears or teeth to the slewing bearing design enables the transmission of torque between the inner and outer rings. This feature is particularly useful when precise rotation control is required, as seen in applications like cranes and heavy machinery.

In summary, a slewing bearing functions as a rotational joint that can support various loads and movements. Its design, which includes rolling elements and optional gear systems, allows it to manage axial, radial, and moment loads while facilitating smooth rotation between connected parts.

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editor by CX 2024-05-14