Product Description

Technical parameter for 4 point contact ball ring bearing, slewing ring, swing Bearing, slewing gear


1 Type four point contact ball type slewing bearing, ring bearing, slewing gear
2 Model I.750.25.00.D.1  I.635.25.00.D.3.V
3 Bore diameter(mm) 546 439.5
4 Outside diameter(mm) 750 635
5 Height(mm) 70 60
6 Material 42CrMo, 50Mn
7 Precision P0. P6. P5.
8 Cage/retainer Nylon or aluminum
9 Gear type internal gear teeth
10 N.W.(kgs) 76 57

flanged type slewing bearing(external gear)
E.505.20.00.C E.650.20.00.C E.750.20.00.C E.850.20.00.C E.950.20.00.C
E.1050.20.00.C E.1200.20.00.C E.1100.32.00.C E.1200.32.00.C E.1300.32.00.C
E.1400.32.00.C E.1500.32.00.C E.1600.32.00.C    
flanged type slewing bearing(internal gear)
I.505.20.00.C I.650.20.00.C I.750.20.00.C I.850.20.00.C I.950.20.00.C
I.1050.20.00.C I.1200.20.00.C I.1100.32.00.C I.1200.32.00.C I.1300.32.00.C
I.1400.32.00.C I.1500.32.00.C I.1600.32.00.C    
flanged type slewing bearing(dual flange)
SD.505.20.00.C SD.650.20.00.C SD.750.20.00.C SD.850.20.00.C SD.950.20.00.C
SD.1050.20.00.C SD.1200.20.00.C SD.1100.32.00.C SD.1200.32.00.C SD.1300.32.00.C
SD.1400.32.00.C SD.1500.32.00.C SD.1600.32.00.C    
four point contact ball slewing bearing( external gear)
E.505.20.00.B E.650.20.00.B E.750.20.00.B E.850.20.00.B E.950.20.00.B
E.1050.20.00.B E.1200.20.00.B E.900.25.00.B E.1000.25.00.B E.1100.25.00.B
E.1200.25.00.B E.318.22.00.D.1 E.403.22.00.D.1 E.535.25.00.D.1 E.589.25.15.D.1
E.595.25.00.D.6 E.864.25.00.D.5 E.972.25.00.D.3 E.1080.25.00.D.5 E.1200.25.00.D.1
E.595.32.00.D.1 E.695.32.15.D.1 E.816.32.00.D.1 E.980.32.00.D.1 E.1144.32.15.D.1
E.1289.32.15.D.1 E.1380.32.15.D.1      
four point contact ball slewing bearing( internal gear)
I.486.20.00.B I.616.20.00.B I.716.20.00.B I.816.20.00.B I.916.20.00.B
I.1016.20.00.B I.1166.20.00.B I.900.25.00.B I.1000.25.00.B I.1100.25.00.B
I.1200.25.00.B I.340.16.00.D.1 I.486.16.00.D.1 I.535.22.00.D.3.V I.562.25.15.D.1
I.570.25.00.D.1 I.635.25.00.D.3.V I.750.25.00.D.1 I.850.25.00.D.1 I.950.25.00.D.1
I.980.25.00.D.3 I.1015.25.00.D.3 I.810.32.00.D.1 I.815.32.10.D.1 I.816.32.10.D.1
four point contact ball slewing bearing(no gear)
SD.486.20.00.B SD.616.20.00.B SD.716.20.00.B SD.816.20.00.B SD.916.20.00.B
SD.1016.20.00.B SD.1166.20.00.B SD.855.25.00.B SD.955.25.00.B SD.1055.25.00.B
SD.1155.25.00.B I.400.22.00.A/SD I.500.22.00.A/SD I.700.22.00.A/SD I.800.22.00.A/SD
I.880.22.00.A/SD I.1000.22.00.A/SD I.1100.22.00.A/SD I.400.22.00.A/SD-T I.500.22.00.A/SD-T
I.700.22.00.A/SD-T I.800.22.00.A/SD-T I.880.22.00.A/SD-T I.1000.22.00.A/SD-T I.1100.22.00.A/SD-T
SD234.14.00.D.1 SD.329.20.00.D.1 SD.430.25.15.D.1 SD.475.20.00.D.1 SD.505.25.15.D.6
double row ball slewing bearing(internal gear)
I.973.2.22.00.D.6 I.1165.2.22.00.D.6 I.1200.2.25.00.D.6 I.1346.2.30.05.D.6 I.1750.2.30.20.D.6
double row ball slewing bearing(external gear)
E.504.2.25.00.D.6 E.608.2.25.10.D.6 E.712.2.25.12.D.6 E.1079.2.20.12.D.3-V E.1080.2.22.00.D.6
single row crossed roller slewing bearing(internal gear)
I.1165.25.12.D.3-RV I.1251.30.12.D.1-RV I.1346.30.15.D.1-RV I.1460.30.12.D.1-RV I.1530.40.12.D.1-RV
I.1770.50.17.D.1-RV I.2571.50.15.D.1-R      
single row crossed roller slewing bearing(external gear)
E.1144.30.12.D.1-RV E.1144.30.12.D.3-RV E.1390.30.15.D.1-R E.1476.45.15.D.1-RV E.1604.50.10.D.1-RV

Why choose CZPT slewing bearings
A pioneer in slewing bearing field, rich experience, can do design, produce, mounting guide
Small order accepted
ISO 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
LYHY 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

Flange Slewing Bearing
Introduction of CZPT flange slewing bearings
CZPT is a professional manufacturer in slewing ring bearings since 1993. We can also design and make other standard and non-standard ball bearings, roller bearings and precision bearings as per customer’s different technical requirements.
Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.
Flange slewing bearing is a special slewing ring bearing, it can have 1 flange in the outer ring, or 1 flange in the inner ring, even it can have 1 flange in both inner ring and outer ring.

Flange slewing bearing has 3 different types:
Flange slewing bearing with no gear
Flange slewing bearing with external gear
Flange slewing bearing with internal gear

Flange slewing bearings have following features:
Compact structure and easily installment.

Flange slewing bearings are widely used in tow truck, and other applications are the same as slewing bearings, such as lifting & transport machinery, mining machinery, construction machinery, excavator, concrete machine, paper machine, plastic and rubber machine and steel plant.

Packaging Details for large diameter slewing bearing with pinion
1). Bearing surface is covered with the anti-rust oil first; And then wrapped with the plastic film;
2). And then packed with Kraft paper and professional belts;
3). At last, with wooden box totally at the outer packing to invoid the rust or the moist;
4). We can depend on the customers demand to be packed;

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.


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.


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.


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
Sealing Gland: Sealed On Both Sides
Rolling-Element Number: Single-Row
Roller Type: Four Point Contact Ball
Material: 50mn, 42CrMo
US$ 720/Piece
1 Piece(Min.Order)

Request Sample



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

How do Different Types of Slewing Bearings Vary in Terms of Design and Function?

Different types of slewing bearings vary significantly in terms of their design and function, catering to diverse industrial requirements. Some common variations include:

  • Single-Row Ball Slewing Bearings: These bearings consist of a single row of balls positioned between two rings. They are compact and suitable for light to moderate axial and radial loads, making them useful in applications like small cranes and excavators.
  • Double-Row Ball Slewing Bearings: These bearings have two rows of balls and higher load-carrying capacity compared to single-row types. They find use in applications requiring higher loads and moment resistance, such as larger cranes and construction machinery.
  • Three-Row Roller Slewing Bearings: These bearings use cylindrical rollers to handle heavy axial, radial, and moment loads. They are commonly found in heavy-duty applications like harbor cranes and mining equipment.
  • Cross Roller Slewing Bearings: These bearings have cylindrical rollers arranged in a crossed pattern between the inner and outer rings. They offer high stiffness and precision, making them suitable for applications like robotic arms and precision machinery.
  • Wire Race Slewing Bearings: These innovative bearings use a thin wire race to support the rolling elements. They are lightweight and compact, often used in medical equipment and aerospace applications.
  • Ball-And-Roller Combination Slewing Bearings: These hybrid bearings combine ball and roller elements to achieve a balance between load capacity and precision. They find use in various industrial machines and equipment.
  • Gearless Slewing Bearings: In some applications, slewing bearings incorporate no gears or teeth. They are used where external gear reduction is present or precise rotation isn’t required.
  • Geared Slewing Bearings: These bearings include internal gears or teeth that allow torque transmission between the inner and outer rings. They are essential in applications requiring controlled rotation, such as cranes and wind turbines.

The choice of slewing bearing type depends on factors like load requirements, available space, rotational precision, and the specific industrial application. Understanding the variations helps engineers select the most suitable bearing for optimal performance.

China Custom Internal Gear Slewing Bearing I. 635.25.00. D. 3. V Slewing Ring Bearing I. 750.25.00. D. 1   carrier bearingChina Custom Internal Gear Slewing Bearing I. 635.25.00. D. 3. V Slewing Ring Bearing I. 750.25.00. D. 1   carrier bearing
editor by CX 2024-04-13

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.

Manufacturer supplier exporter of slewing bearings.

Recent Posts