Product Description

1 Type single row 4 point contact ball slewing bearing, ring bearing, slewing gear
2 Model NBL.30.1255.200-1PPN(1400*1105*90mm)
3 Dimension Range 200-8000mm
4 Manufacturing Experience 20 years
5 Certificate ISO9001, BV, ABS, SG,LR,DNV
6 Material 42CrMo, 50Mn,C45
7 Precision P0. P6. P5.
8 Cage/retainer Nylon or Steel or Brass
9 Gear type Internal/external/no gear teeth
10 Hardness forging hardness HB229-352, raceway hardness HRB58-62

four point contact ball slewing bearing without gear teeth
NBL.20.571.200-1PPN NBL.20.571.201-2PPN NBL.30. 0571 .200-1PPN NBL.30. 0571 .201-2PPN
NBL.20.571.200-1PPN NBL.20.571.201-2PPN NBL.30.1055.200-1PPN NBL.30.1055.201-2PPN
NBL.20.0544.200-1PPN NBL.20.0544.201-2PPN NBL.30.1155.200-1PPN NBL.30.1155.201-2PPN
NBL.20.0644.200-1PPN NBL.20.0644.201-2PPN NBL.30.1255.200-1PPN NBL.30.1255.201-2PPN
NBL.20. 0571 .200-1PPN NBL.20. 0571 .201-2PPN NBL.30.1355.200-1PPN NBL.30.1355.201-2PPN
NBL.20.0844.200-1PPN NBL.20.0844.201-2PPN NBL.30.1455.200-1PPN NBL.30.1455.201-2PPN
NBL.20.0944.200-1PPN NBL.20.0944.201-2PPN    
NBL.20.1094.200-1PPN NBL.20.1094.201-2PPN    

Why choose CZPT slewing bearings
A pioneer in slewing bearing field, rich experience, can do design, produce, mounting guide
Small order accepted
SO certified company
Variorum models
7*24hours hotline to help you with your cranes
Strict quality control system to ensure quality for slewing bearing

LYHY Slewing Bearing Types
CZPT slewing bearings can be divided into the following types as per  their structures:
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.
And all these types of slewing bearings can be further divided into bearings without gears, bearings with external gears and bearings with internal gears.

Detailed description of these types slewing bearings

Single row 4 point contact ball slewing bearings
     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 bearings
     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 bearings
     This kind of bearings can support high static loads with simple structures. They are mainly used in situations with variation load position and direction and continuously rotating. Main applications of this kind of bearings are deck hoisting, mining and material handling etc.
Triple row cylindrical roller slewing bearings
     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.

About CZPT bearings
1.introduction:we are a manufacturer of slewing bearing since 1993, our factory occupies a area of 30000square meters with 4 workshop and 1 office building. 
2. Featured products: slewing bearing and slewing drive
3. Capital: Current is 1 million RMB, but we are increasing the capital to 10 million RMB
4. Workers: 40
5. Certificate: ISO9001:2008, 3.1 certificate, CCS certificate, Science and Technology Progress Award
6. Annual Exportation: 8million USD
7. Exported countries: (39)
Asia: India, Pakistan, Iran, Signore, Georgia, Malaysia, Vietnam, Thailand, Philippines, Israel, Korea, UAE, Sri Lanka, Saudi Arabia,
Europe: Turkey, Russia, Spain, Czech Republic, Italy, Poland, Slovakia, Bosnia and Herzegovina, Austria, France, Germany, Switzerland, Finland, Ukraine, UK
America: USA, Canada, Mexico, Brazil, Puerto Rico, Peru, Chile
Africa: South Africa, Egypt
Oceania: Australia

Production Process of CZPT slewing bearings

Quality Control Process of CZPT slewing bearings
LYHY Slewing Bearing Packing 
Bearing surface is covered with the anti-rust oil first; and then wrapped with the plastic film;
And then packed with kraft paper and professional belts;
At last, with wooden box totally at the outer packing to invoid the rust or the moist;
We can depend on the customers  demand to be packed;
 

Slewing Ring Bearings——Applications:
Slewing ring bearings are widely used in industry and known as “the machine joints” Here under 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 equipment (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 equipment (e.g. paper machine, plastic, rubber machine, weave machine)
6. Wind power generator
7. Packing machinery

Transportation:
All CZPT slewing ring bearings can be usually delivered timely, usual production time is 15-50 days based on different slew bearings diameters, sometimes slew rings will be in stock.
Slewing bearings can be offered different delivery terms, such as EXW, FOB, CIF, DDU and so on.
Also, slewing rings can be transported by different transport ways, by express (such as DHL, TNT, UPS, FEDEX and so on), by air, by sea, by truck, by railway and so on.

INSTALLATION OF CZPT SLEWING BEARINGS

Preparation:
Make sure that the model is correct and slewing bearing isn’t damaged during transportation.
2.  Check the appearance and rotational state of the bearing, such as rotational precision clearance, rotating flexibility, seals position, lubrication grease etc.
3.  The installation datum plane and bracket installing plane should be clean, grease, burr, paint and other foreign body should be wiped off.

Installation:

1. The screws in the installing plane should be fit with the mounting holes in the slewing bearing
2.  The slewing bearing has a soft zone marked with an “s” on the upper surface, when installing the bearing, it is important to ensure that this area is placed in a non-load or infrequent load zone.
3.  When the bearing is placed on the supporting frame work it is important to check the interface between these 2 surfaces. This check should be carried out with the insertion of feel gauges between the 2 surfaces. If a gap should exist then it is recommended to plane/resurface the effective area so as to remove the gap.
4.  Install slewing bearing with high strength screws, and choose appropriate strength bolts. All bolts are required to be tightened evenly. The sequence of this tightening process is shown in Pic. Welding of bearing is not allowed, in the event of welding any adjacent parts, heat transfer shall be avoided so as to cause the bearing to become deformed or change the hardness.
5.  After installation, the bearing should be rotated to check for smooth operation and any emission of unusual noise. If either of the aforementioned are noted, then the bearing should be adjusted to eliminate them. The teeth of the largest run-out are coated with green paint.

FAQ:

Q: Are LYHY BEARINGS trading company or manufacturer?
A: LYHY BEARINGS is a professional manufacturer for slewing bearings, thin section bearings, ball bearings and rolling bearings

Q: How do LYHY BEARINGS control quality of their bearing?
A: LYHY BEARINGS has established strict quality control systems, all the products and services has passed ISO9001-2008 Quality Certificate and third party such as CCS, LR,ABS,BV

Q: What is the MOQ?
A: MOQ is 1pc, pls message us for detailed information.

Q: How about the package for CZPT bearings?
A: Standard Industrial packing in general condition (Plastic tube+ professional plastic belts+ plywood case). Accept design package when OEM.

Q: How long is the production time?
A: It takes about 7-40 days, depends on the model and quantity.

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

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

Q: Can we use our own LOGO or design on bearings?
A: Yes. OEM is acceptable for LYHY BEARINGS. We can design as per your requirements and use your own LOGO and package design. /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Standard or Nonstandard: Standard
Feature: Corrosion-Resistant, Heat-Resistant
Sealing Gland: Sealed On Both Sides
Rolling-Element Number: Single-Row
Roller Type: Four Point Contact
Material: 50mn,42CrMo, S48c
Samples:
US$ 810/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

slewing bearing

How do Slewing Bearings Contribute to the Smooth Rotation of Cranes and other Heavy Machinery?

Slewing bearings play a vital role in ensuring the smooth and efficient rotation of cranes and other heavy machinery that require controlled movement. Their design and functionality are specifically tailored to handle the unique challenges posed by such applications. Here’s how slewing bearings contribute to the smooth rotation of cranes and heavy machinery:

  • Load Handling:

Crane operations involve lifting and moving heavy loads. Slewing bearings are designed to carry substantial axial, radial, and moment loads simultaneously. This load-handling capacity allows cranes to lift and transport heavy objects with precision.

  • Smooth Rotation:

Slewing bearings provide a smooth interface between the upper structure (superstructure) and the lower structure (substructure) of the machinery. This allows for controlled and precise rotation of the upper structure, enabling cranes to maneuver smoothly during lifting, loading, and unloading operations.

  • Efficient Torque Transmission:

During crane rotation, torque generated by the motor is transmitted through the slewing bearing to the upper structure. The bearing’s design ensures efficient torque transmission, minimizing energy losses and facilitating smooth rotation even under heavy loads.

  • Low Friction and Wear:

Slewing bearings are engineered to minimize friction and wear. This reduces the energy required for rotation and prevents premature wear that could affect the bearing’s performance and longevity.

  • High Stiffness:

Slewing bearings exhibit high stiffness, which contributes to the stability of the machinery during rotation. This stiffness ensures minimal deflection and maintains precise alignment, essential for safe and controlled movement.

  • Uniform Load Distribution:

The raceway design of slewing bearings promotes uniform load distribution among rolling elements. This prevents stress concentrations and uneven wear, enhancing the bearing’s durability and contributing to smooth operation.

  • Slow and Controlled Movement:

Crane operations often require slow and controlled rotation, especially when positioning heavy loads. Slewing bearings facilitate this type of movement, allowing operators to make precise adjustments.

  • Customization for Specific Applications:

Slewing bearings can be customized to match the specific requirements of different crane designs and applications. This customization ensures optimal performance and longevity in various operational scenarios.

In summary, slewing bearings are essential components that enable the smooth and precise rotation of cranes and heavy machinery. Their load-carrying capacity, low friction, high stiffness, and ability to transmit torque efficiently contribute to the reliable and controlled movement required for various lifting and loading operations.

slewing bearing

How does Proper Lubrication Impact the Performance and Longevity of Slewing Bearings?

Proper lubrication plays a crucial role in enhancing the performance and extending the longevity of slewing bearings. Here’s how it impacts these aspects:

  • Reduced Friction and Wear:

Lubrication forms a protective layer between the rolling elements and raceways, reducing friction and wear. This minimizes surface contact and prevents metal-to-metal contact, leading to less wear and extended bearing life.

  • Heat Dissipation:

Lubrication helps dissipate heat generated during operation. Adequate heat management prevents overheating, which can otherwise lead to premature bearing failure and reduced efficiency.

  • Corrosion Protection:

Lubricants with anti-corrosion properties form a barrier that protects bearing surfaces from moisture and environmental contaminants. This is crucial in preventing rust and corrosion, especially in challenging operating environments.

  • Sealing Effect:

Lubrication can enhance the sealing effect of bearing seals, preventing the ingress of dust, dirt, and other particles. This maintains the integrity of the bearing’s internal components and reduces the risk of contamination-related failures.

  • Noise and Vibration Reduction:

Properly lubricated bearings generate less friction and operate more smoothly, resulting in reduced noise and vibration levels. This is particularly important in applications where noise reduction is essential.

  • Improved Efficiency:

Effective lubrication minimizes energy losses due to friction, leading to improved overall efficiency of machinery. This is significant in applications that require high performance and energy savings.

  • Prevention of Micro-Movements:

Lubrication helps prevent micro-movements between the rolling elements and raceways, reducing wear caused by repeated impacts and vibrations during operation.

  • Maintenance Reduction:

Proper lubrication reduces the need for frequent maintenance and replacement of bearings. This not only saves time and resources but also contributes to increased uptime and reduced operational disruptions.

  • Longevity:

By reducing wear, preventing corrosion, and managing heat, proper lubrication significantly extends the lifespan of slewing bearings. This, in turn, contributes to improved equipment reliability and reduced lifecycle costs.

In conclusion, proper lubrication is essential for optimizing the performance, efficiency, and durability of slewing bearings. Regular maintenance and adherence to manufacturer-recommended lubrication intervals ensure that the bearings operate smoothly and consistently over their operational life.

slewing bearing

What are the Main Applications of Slewing Bearings?

Slewing bearings find wide applications across various industries due to their ability to handle complex loads and facilitate rotational movement. Some of the main applications of slewing bearings include:

  • Construction Machinery: Slewing bearings are essential components in construction equipment such as excavators, cranes, concrete pumps, and drilling rigs. They enable smooth rotation and movement, supporting heavy loads and dynamic forces.
  • Wind Turbines: In wind energy systems, slewing bearings are used to orient the rotor blades and nacelle to capture maximum wind energy. Their durability and load-bearing capacity make them crucial for efficient wind turbine operation.
  • Mining Equipment: Slewing bearings are used in mining machinery like stacker-reclaimers and conveyor systems. They enable the movement of large loads, contributing to efficient material handling and processing.
  • Marine Applications: Slewing bearings are employed in ship cranes, davits, and other marine equipment. They assist in cargo handling, ship maintenance, and various onboard operations.
  • Aerial Work Platforms: Slewing bearings are integral to aerial platforms and access equipment. They enable controlled and safe movement for workers at elevated heights.
  • Robotics and Automation: Slewing bearings play a role in industrial robots and automation systems. They facilitate precise and controlled rotational movement in manufacturing processes.
  • Medical Equipment: Some medical imaging equipment, such as CT scanners and MRI machines, use slewing bearings for rotational movement, contributing to accurate diagnostics.
  • Defence and Aerospace: Slewing bearings are employed in defense equipment like radar systems and missile launchers, as well as in aerospace applications like aircraft landing gear.

These are just a few examples of the many applications of slewing bearings across different industries. Their ability to handle diverse loads and rotational movements makes them versatile components in various machinery and equipment.

China best OEM Slewing Ring Bearing with Dual Flange Nbl. 30.1255.200-1ppn   with high qualityChina best OEM Slewing Ring Bearing with Dual Flange Nbl. 30.1255.200-1ppn   with high quality
editor by CX 2024-04-19

Slewing bearings

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