Introduction
In the brutal world of forestry equipment, bearing failure isn’t an option. Our specialized F-Series logging bearings – including flagship models F016322, F019218, F033618, F054938, F064588, and F065070 – are battle-tested solutions for harvester heads, swing frames, and delimbing mechanisms where shock loads, contamination, and continuous operation are the norm.

Why Our Forestry Bearings Outperform

1. Extreme Environment Protection

• Triple-lip seals with Arctic-grade grease (-40°C to 120°C operational range)

• Corrosion-resistant coatings for wet conditions (salt spray tested 500+ hours)

2. Enhanced Durability Features

• Forged 52100 steel races with deep hardening (60-64 HRC)

• Oversized rollers for 30% higher dynamic load ratings than standard bearings

• Case-hardened gears on integrated rotation units

3. Model-Specific Advantages

We’re excited to announce the successful shipment of high-performance slewing bearings (Models 232-36-2250-FF & 232-20-2100-FF) to Malaysia in May 2025.

This delivery highlights our capability to supply precision-engineered slewing rings to demanding industries worldwide.

Whether you’re in construction, renewable energy, mining, or material handling, our bearings ensure durability, smooth rotation, and long service life – even in harsh environments.

Why Customers Worldwide Trust Our Slewing Bearings:

 Heavy-Duty Performance – Designed for high axial/radial loads and moment capacities.
 Customizable Options – Gear teeth, sealing systems, coatings, and flange adaptations available.
 Fast Global Shipping – Smooth logistics to Southeast Asia, Europe, Africa, and the Americas.
 24/7 Technical Support – Expert assistance from inquiry to installation.

Do You Need Reliable Slewing Bearings?

We supply standard and custom slewing rings for:
 Cranes & Excavators
 Solar Trackers & Wind Turbines
 Mining & Material Handling Equipment
 Military & Defense Applications

1. Construction Machinery:
   • Cranes: Tower cranes, mobile cranes, crawler cranes, etc.
   • Heavy machinery such as excavators, bulldozers, loaders, etc.
2. Wind Power:
   • Rotor bearings for wind turbines, used to support and rotate the blades of wind turbines.
3. Port Machinery:
   • Port cranes, container cranes, gantry cranes, etc.
4. Metallurgical Machinery:
   • Used in continuous casting machines, rolling mills, etc. in steel plants.
5. Medical Equipment:
   • Used in medical equipment that requires precise rotation, such as CT scanners, radiotherapy equipment, etc.
6. Amusement Rides:
   • Ferris wheels, carousels, and other amusement rides that require rotation.
7. Military Equipment:
   • Turret rotation systems for tanks, armored vehicles, and other military vehicles.
8. Agricultural Machinery:
   • Rotating parts of agricultural machinery such as harvesters, seeders, etc.
9. Solar Tracking Systems:
   • Used in automatic solar panel tracking systems to maximize solar energy collection.
10. Industrial Robots:
    • Used in the joints of industrial robots to provide flexible rotational motion.
11. Aerospace:
    • Used in certain rotating parts of aircraft and satellites.
12. Marine Engineering:
    • Used in rotating parts of offshore platforms and ships, such as rotating cranes.

Introduction:

In the realm of heavy machinery and engineering, the reliability and efficiency of rotating components are paramount. Large rotary bearings and three-row crossed roller bearings (CRBs) are critical components that provide robust support and precise rotation in various applications. This article delves into the advantages and applications of these bearings, highlighting their significance in modern engineering.

Advantages of Large Rotary Bearings:

1. High Load Capacity: Large rotary bearings are designed to handle substantial radial, axial, and moment loads, making them ideal for applications requiring high torque and stability.
2. Compact Design: Despite their high load-bearing capabilities, these bearings are compact, saving space in the overall design of machinery.
3. Low Friction: The design of large rotary bearings reduces friction, leading to lower energy consumption and increased efficiency.
4. Long Service Life: Due to their robust construction and precision engineering, these bearings have a long service life, reducing maintenance costs and downtime.
5. Versatility: They can be customized to fit various applications, including wind turbines, cranes, and construction machinery, among others.

Advantages of Three Row Crossed Roller Bearings:

1. High Rigidity: The three-row design provides superior rigidity, which is crucial for applications requiring precise positioning and minimal deflection.
2. High Precision: CRBs offer high precision due to their preloaded design, which helps in maintaining accuracy over time.
3. Simplified Assembly: The modular design of CRBs allows for easier assembly and disassembly, facilitating maintenance and repair.
4. High Speed Capability: These bearings can operate at high speeds without compromising performance, making them suitable for high-speed machinery.
5. Shock Absorption: The crossed roller design helps in absorbing shocks and vibrations, enhancing the durability of the machinery.

Applications:

1. Wind Turbines: Large rotary bearings are used in the main shafts of wind turbines to support the rotation under varying wind conditions.
2. Cranes and Hoists: They are essential in the rotating parts of cranes and hoists, providing the necessary support and precision for lifting heavy loads.
3. Construction Machinery: In excavators and other heavy machinery, these bearings ensure smooth operation and reduce wear and tear.
4. Aerospace: In aerospace applications, such as satellite dishes and antenna systems, they provide the necessary precision for accurate positioning.
5. Material Handling Equipment: Conveyor systems and other material handling equipment rely on these bearings for smooth and efficient operation.

Conclusion:

Large rotary bearings and three-row crossed roller bearings are indispensable in modern engineering, offering a combination of high load capacity, precision, and durability. Their versatility makes them suitable for a wide range of applications, from renewable energy to heavy machinery. As technology advances, the demand for these bearings is expected to grow, further solidifying their importance in the engineering world.

Luoyang MC Bearing Technology Co.,Ltd

Our Slewing Bearing be widly used on Excavator.

High Load Capacity: Rotary bearings are designed to withstand high loads, which is crucial for excavators during heavy-duty operations.

Compact Design: They typically have a compact size, which helps reduce the overall dimensions and weight of the excavator, thereby improving maneuverability and transport efficiency.

High Reliability: The durability and reliability of rotary bearings reduce the need for maintenance and downtime, which is essential for increasing the work efficiency of the excavator.

Easy Maintenance: Many rotary bearings are designed for quick and easy maintenance, which helps to reduce long-term operational costs.

Long Lifespan: High-quality rotary bearings usually have a longer service life, reducing the frequency of replacement and associated costs.

Flexibility: They allow the excavator to rotate and position accurately in multiple directions, which is important for improving the precision and efficiency of the work.

Adaptability: Rotary bearings can adapt to various working environments and conditions, including harsh climates and terrains.

Reduced Vibration and Noise: High-quality rotary bearings can reduce vibration and noise during operation, enhancing operator comfort and safety.

Improved Energy Efficiency: By reducing friction and increasing mechanical efficiency, rotary bearings help to lower the energy consumption of the excavator.

Enhanced Safety: In emergency situations, rotary bearings can respond quickly to ensure the safety of the operator and the equipment.

This translation can be used to describe the advantages of rotary bearings in the application field of excavators.

Type as :PC200  PC200-5 PC220-7  PC240-3  PC270  PC300 PC340  PC400-7 PC450-8 PC600-7   PC750  PC1250  PC2000
R916 R926 R934 R944 CX130 CX210 E215 CX240 CX460 JCB220 JS200 JS210 JS130 SH265 SH210-5 SH280 SH200
R110-7 R140LC-7 R210-7 R220LC R250-7 R290 R320 R360 R450 EC160 EC180 EC210 EC240 EC290 EC390 DX225
DX300 CAT307 CAT312 CAT315 CAT320B CAT365 CAT330 CAT345 CAT385 EX60 EX200 EX210 EX330 EX230 EX240
ZX370 ZX400 ZX450 SK60 SK210 SK200 SK250 SK330 SK350 SK480 SY135 SY210 SY235 SE210 MX292 LG922 LG925

There are thousands types swing circle here for choose.If you want more, please contact us freely.

Luoyang  MC Bearing Produce Kinds of Slewing Bearing, Cross Roller Bearing.

Crossed roller bearings play a crucial role in machinery by providing support and reducing friction. For applications that require high speed and need to withstand radial, axial, and moment loads, crossed roller bearings are generally preferred.

The inner and outer rings of crossed roller bearings are minimized in size, especially in ultra-thin structures, making them close to the limits of small dimensions. They also possess high rigidity. As a result, they are widely used in industrial robot joints or rotating parts, rotating worktables in machining centers, rotating parts of mechanical arms, precision rotary worktables, medical instruments, measuring instruments, IC manufacturing devices, and other applications.

The rolling elements in crossed roller bearings are typically arranged in a crossed arrangement using cylindrical or tapered rollers in a single raceway groove. The rollers are separated by brass retainers or engineering plastic isolating blocks, which provide high rotational accuracy, large load-bearing capacity, small overall dimensions, high rotational speed and rigidity. Crossed roller bearings have a wide range of applications and are suitable for industrial robot joints, CNC rotary tables, DD motors, medical equipment, and other fields.

2. Characteristics and Advantages of Crossed Roller Bearings

1. Crossed roller bearings have a sturdy and inseparable inner and outer ring structure that can achieve high rigidity and high precision without being influenced by the surrounding structure. The bearings are suitable for medium to high speeds, and they have isolating blocks between the cylindrical rollers to provide smooth rotation.

2. Crossed roller bearings have the characteristics of high rigidity, accuracy, and easy installation. The mounting holes allow them to be quickly fixed to components. This type of bearing also has isolating blocks between the cylindrical rollers.

3. Crossed roller bearings have a smaller outer diameter and narrower width. They can be selected when high performance and minimal space occupation are required.

Since crossed roller bearings are divided into two parts, the outer or inner ring is fixed together after installing the rollers and retainers. As a result, they are very easy to install. In addition, crossed roller bearings have high precision, with accuracy reaching P4/P2 levels, and smaller dimensions, making the host machine more space-saving.

3. Classification of Crossed Roller Bearings

– SX Type (Inner ring integral, outer ring separable, ultra-thin): Under the same shaft diameter, this type has smaller cross-sectional dimensions compared to the HRB type. Due to its ultra-thin design, it does not have mounting holes on the outer or inner ring, and flanges and support seats are needed for installation. It is suitable for applications requiring rotation of the inner ring.

Type: SX011814,SX011818,SX011820,SX011824,SX011828,SX011832,SX011836,SX011840,SX011848,SX011860,SX011868
,SX011860,SX0118/500

– RU Type (Inner and outer ring integral, with mounting holes): Both the outer and inner rings have mounting holes, so flanges and support seats are not required during installation. Additionally, because the outer and inner rings are both integral structures, installation has almost no impact on performance, ensuring stable rotational accuracy and torque. It is suitable for situations where both the outer and inner rings rotate.

Type:RU124G,RU148G,RU178G,RU228,RU297,RU445,RU228X,RU297X,RU445X,RU228G,RU297G,RU445G

– RAU Type (Inner and outer ring integral, ultra-thin): This type is a compact version of the HRB type, with reduced thickness of the inner and outer rings. It is most suitable for lightweight and compact designs, such as robot and mechanical arm rotating parts. It can be used in situations requiring rotation of both the outer and inner rings.

– RBH Type (Inner and outer ring integral, ultra-thin): It features an ultra-thin design with no mounting holes on the outer or inner ring, so flanges and support seats are required for installation. Due to its integral structure for both the outer and inner rings, installation has no impact on performance, ensuring stable rotational accuracy and torque. It is suitable for situations where both the outer and inner rings rotate, but with requirements for small dimensions.

– RB Type (Inner ring integral, outer ring separable): This type is the basic type of crossed roller bearings. The outer ring is divided into two pieces, while the inner ring is an integral structure. It is most suitable for applications that require high precision in the rotation of the inner ring.

RB4010,RB4510,RB5013,RB6013,RB7013,RB8016,RB9016,RB10016,RB10020,RB11012,RB11015,RB11020,
RB12016,RB12025,RB13015,RB13025,RB14016,RB14025,RB15013,RB15025,RB15030,RB16025,RB17020,RB18025,
RB19025,RB20025,RB20030,RB20035,RB22025,RB24025,RB25025,RB25030,RB25040,RB30025,RB30035,RB30040,
RB35020,RB40035,RB40040,RB45025,RB50025,RB50040,RB50050,RB60040,RB70045,RB80070,RB90070,RB1000110
,RB1250110

Bearing types are varied, in various mechanical equipment in the field of the application of the effect is not the same, different needs constitute a different bearing production conditions. In some aspects of the need to use more and better performance of the quality of bearings in the production and processing of the method used in the process of joining the ultra-precision machining process. The so-called precision machining process refers to the machining accuracy and surface finish higher than the corresponding machining method of various processing technology.

In the rolling bearing manufacturing process, super-fine is the last procedure of bearing ring processing, it is for reducing or eliminating the round deviation left over from grinding processing, repairing the shape error of the groove, refining its surface roughness, improving the surface physical and mechanical properties, reducing the vibration of the bearing, agitation, improving the mission of the bearing, has an important role.

Analyses the 4 stages of the bearing superfinishing process:
(1) strong cutting stage. Workpiece surface rough spikes and oil stone surface contact, contact stress is very large, so that the abrasive grains broken self-sharpening, cutting role is strong.
(2) Normal cutting stage. After a few seconds. Workpiece rough layer is ground, that is, into the normal cutting stage, the surface of the oil stone has no black chips attached, but the cutting still continues.

(3) Grinding transition stage. The abrasive grain from the sharpness is reduced, the abrasive grain edge edge is smoothed, the chip oxides began to embed the oil stone void, the abrasive grain powder blocking the oil stone pore, so that the abrasive grain can only be weak cutting, accompanied by extrusion and the role of the research and polishing, the roughness of the surface of the workpiece will soon be reduced, the surface of the oil stone has a black chip oxides adherence.

(4) Stop cutting and grinding stage. Oil stone and workpiece mutual friction has been very smooth, the contact area increases greatly, the pressure decreases, the abrasive particles have been unable to penetrate the oil film and workpiece contact, when the supporting surface of the oil film pressure and oil stone pressure balance, the oil stone is floating. Between the formation of oil film, which is no longer cutting. This stage is unique to ultra-fine machining.

Super-fine bearings can be reflected in the following three aspects
1, can effectively reduce the degree of corrugation.
In the superfine research process, in order to ensure that the oil stone always acts on the wave peak and not in contact with the wave valley, the oil stone and the workpiece contact arc ≥ the wavelength of the workpiece surface corrugation, in this way, the wave peak of the contact pressure is larger, the peak is excised, so as to reduce the degree of corrugation.
2、Improve the groove shape error of ball bearing raceway.
The super fine grinding can effectively improve the groove shape error of about 30% of the raceway.
3、It can make the surface of the super fine grinding produce compressive stress.
In the process of superfine research, the main cold plastic deformation, so that after superfine research, the surface of the workpiece to form residual compressive stress.
4、It can increase the contact area of the working surface of the collar.
After ultra-precision grinding, the contact support area of the working surface of the collar can be increased from 15% to 40% after grinding to 80% to 95%.