bg-image

Slewing Bearing – PRS Bearing

Discover high-performance slewing bearings engineered for heavy-duty applications. From crane to wind turbine, our bearings deliver reliability and longevity.

INTRODUCTION

What is a Slewing Bearing?

A slewing bearing, also known as a slewing ring or turntable bearing, is a large-diameter rotation element that supports axial and radial loads while allowing relative rotation between two parts.

Customization Available: Slewing bearing specifications, dimensions, materials, and configurations can be adjusted based on project requirements.

Heavy-Duty Performance

Designed to support heavy loads while delivering smooth, reliable rotary motion in demanding industrial applications.

Multi-Load Capability

Handles radial, axial, and moment loads simultaneously for greater stability and simplified equipment design.

Wide Industrial Applications

Available in a broad range of sizes and configurations for cranes, excavators, wind turbines, rotary tables, and more.

Multiple Bearing Types

Choose from four-point contact ball, cross roller, double-row ball, or triple-row roller designs to match your application.

PRODUCTS

Our Slewing Bearing Product Range

Browse our comprehensive selection of slewing bearings including four-point contact, cross roller, and double-row designs. Each product is precision-manufactured to meet international standards.
PU Series

PU Series Four-Point Contact Ball Slewing Bearings

The design of PU series four-point contact ball slewing bearing focuses on low friction and long life, which is suitable for the working environment of high load and low speed rotation, prolonging the service life of the equipment and reducing the maintenance cost.

View Product
PLU20-Series

PLU20 Series 4-Point Contact Ball Slewing Bearings

PLU20 series four-point contact ball slewing bearings are designed with high precision and are suitable for use in construction machinery, automation equipment and other fields, providing high load capacity and stable performance.

View Product
PLA20 Series

PLA20 Series

PLA20 series 4-point contact ball slewing bearings are made of high-strength steel, providing excellent load carrying capacity and durability. Suitable for heavy machinery and equipment, it supports external gear, internal gear and gearless design to meet different application requirements.

View Product
PLI20-Series

PLI20 Series Four Point Contact Ball Slewing Bearings

PLI20 series four point contact ball slewing bearings are designed to support axial, radial and tilting moment loads, and can be customized to meet the needs of different industrial equipment to ensure optimal performance and reliability.

View Product
PSU20-Series

PSU20 Series Four-Point Contact Ball Slewing Bearings

PSU20 series four-point contact ball slewing bearings are designed with high precision and are suitable for use in cranes, welding machines, automation equipment and other fields, providing high load carrying capacity and precision rotary performance.

View Product
PSA 20 Series

PSA20 Series Four-Point Contact Ball Slewing Bearings

PSA20 series four-point contact ball slewing bearing adopts advanced four-point contact design, which is suitable for heavy equipment such as construction machinery, tunnel boring machines, cranes and so on, to meet the demand of high load and high precision rotation.

View Product
PSI20 Series

PSI20 Series 4-Point Contact Ball Slewing Bearings

PSI20 series four-point contact ball slewing bearings adopts internal gear design, with high load capacity and light structure, widely used in construction machinery, wind power equipment, port machinery and other fields.

View Product
PSI20 Series

PSU25 Series 4-Point Contact Ball Slewing Bearings

PSU25 series four-point contact ball slewing bearings are made of high-strength 42CrMo4 alloy steel with vacuum carburizing treatment, which has excellent wear resistance and load carrying capacity. It is suitable for cranes, tower cranes, excavators and other construction machinery to provide stable rotary support.

View Product
PSA25 Series

PSA25 Series

Choose PSA25 series four-point contact ball slewing bearings to enjoy the perfect combination of high load capacity, compact design and high durability for a wide range of heavy-duty rotary applications, ensuring stable equipment operation over long periods of time.

View Product
PSA25 Series

PSI25 Series Four Point Contact Ball Bearings

The PSI25 series four-point contact ball slewing bearings feature an internal tooth design designed to withstand high loads and provide precision rotation. They are widely used in construction machinery, lifting equipment, wind energy equipment and other fields.

View Product
PLU32-Series

PLU32 Series

PLU32 series four-point contact ball slewing bearings are made of high-quality chrome steel, with excellent load carrying capacity and stability, widely used in construction machinery, automation equipment and other fields.

View Product
PLA32-Series

PLA32 Series Four-point Contact Ball Slewing Bearings

Explore the PLA32 series four-point contact ball slewing bearings, which provide excellent load carrying capacity and compact design, and are widely used in heavy machinery and precision equipment.

View Product
ADVANTAGES

Why Choose PRS Bearing for Slewing Bearings?

With decades of experience, PRS Bearing delivers superior quality, customizability, and global service. Discover what sets us apart.

Precision Manufacturing

Every slewing bearing is produced using advanced CNC machining, precision grinding, and strict quality inspection to ensure outstanding accuracy, stability, and long-term reliability.

Comprehensive Product Range

We offer four-point contact ball, cross roller, double-row ball, and triple-row roller slewing bearings in a wide range of sizes, with geared and gearless options to meet diverse application needs.

OEM & Custom Solutions

Our engineering team provides customized slewing bearings based on your drawings or technical requirements, including special dimensions, gear designs, materials, heat treatments, and sealing solutions.

High Load Capacity & Durability

Manufactured from premium bearing steel and optimized through advanced heat treatment processes, our slewing bearings deliver exceptional load capacity, wear resistance, and long service life in demanding environments.

Strict Quality Assurance

Every bearing undergoes rigorous inspections, including dimensional verification, hardness testing, raceway accuracy checks, and performance testing to ensure consistent product quality.

Fast Production & Reliable Delivery

Efficient manufacturing processes and flexible production capacity enable us to deliver both standard and customized slewing bearings with competitive lead times for global customers.

Engineering & Technical Support

From bearing selection and load calculation to installation guidance and after-sales service, our experienced engineers provide professional technical support throughout your project.

Trusted by Global Industries

PRS slewing bearings are widely used in construction machinery, wind energy, industrial automation, port equipment, mining, medical systems, and other demanding industries, earning the trust of customers worldwide.

APPLICATION

Applications of Slewing Bearings

Slewing bearings are critical components across a wide range of industries. Explore how PRS Bearings power demanding rotational systems.

Construction & Crane

Tower cranes, mobile cranes, crawler cranes use slewing bearings for safe, smooth rotation.

Wind Energy

Wind turbine pitch and yaw systems rely on high-precision cross roller bearings for blade angle adjustment and nacelle orientation.

Mining & Excavation

Excavators, draglines, and drilling rigs integrate slewing rings to handle extreme loads and continuous rotation.

Port & Marine

Shipboard cranes, harbor cranes, and deck equipment require corrosion-resistant slewing bearings.

Renewable Energy

Solar tracking systems and hydropower gate mechanisms utilize large-diameter turntable bearings.

Defense & Aerospace

Radar antennas, missile launchers, and satellite ground stations demand high-accuracy slewing solutions.

Industrial Machinery

Robotics, packaging equipment, and rotary tables benefit from compact, high-rigidity slewing bearings.

Customized services

Custom Slewing Bearing & Support Services

Need a non-standard slewing bearing? Our custom engineering approach ensures your unique requirements are met with precision and efficiency.
Send E-mail Customization

Share your load capacity, operating speed, installation dimensions, and working environment with our engineering team. We evaluate your application and recommend the most suitable slewing bearing solution.

Using advanced design tools and engineering analysis, we optimize bearing structure, raceway geometry, rolling elements, materials, and sealing systems to maximize performance and service life.

Prototype bearings are manufactured for functional verification and real-world performance testing, ensuring the final design fully meets your technical and operational requirements.

Our modern production facilities ensure every slewing bearing is manufactured with strict quality control, including material inspection, heat treatment verification, dimensional measurement, and precision testing.

Each slewing bearing undergoes comprehensive testing for load capacity, rotational accuracy, running smoothness, and sealing performance to ensure dependable operation in demanding industrial environments.

We provide secure packaging, global shipping, installation guidance, and responsive after-sales support. Our services also include slewing bearing replacement, refurbishment, maintenance, and condition monitoring to maximize equipment reliability.

FAQ

Slewing bearing FAQs

To assist heavy machinery designers, structural engineers, and procurement managers in optimizing large-scale rotational equipment, the PRS Bearing technical team has compiled the most critical engineering answers regarding slewing bearings.

What is a slewing bearing?
A slewing bearing is a large-diameter rolling-element bearing designed to support axial, radial, and overturning moment loads simultaneously while enabling smooth rotary motion. It is widely used in cranes, excavators, wind turbines, rotary tables, and other heavy-duty industrial equipment.

How do I choose the right slewing bearing?
The correct bearing depends on several factors, including load capacity, rotational speed, mounting dimensions, gear requirements, operating environment, accuracy, and expected service life. Providing application details allows our engineers to recommend the most suitable solution.

How should a slewing bearing be lubricated?
Regular lubrication is essential for extending bearing life. The lubrication interval depends on operating conditions, load, speed, temperature, and environmental factors. High-quality grease should be applied through the lubrication ports according to the maintenance schedule.

How do I know when a slewing bearing needs replacement?
Common signs include excessive rotational clearance, abnormal noise, vibration, increased operating torque, uneven rotation, visible raceway damage, grease leakage, or cracked gear teeth. Regular inspections help identify issues before they lead to equipment failure.

What are the different types of slewing bearings?
The most common types include:

Four-Point Contact Ball Slewing Bearings – Suitable for combined loads and general-purpose applications.
Cross Roller Slewing Bearings – Provide high rigidity and excellent rotational accuracy.
Double-Row Ball Slewing Bearings – Offer higher load capacity for medium to heavy-duty equipment.
Triple-Row Roller Slewing Bearings – Designed for extremely heavy loads and demanding operating conditions.

What materials are used for slewing bearings?
Most slewing bearings are manufactured from high-quality alloy or bearing steel with precision heat treatment for enhanced strength and wear resistance. Stainless steel and special materials are also available for corrosive or specialized applications.

What factors affect the service life of a slewing bearing?
Bearing lifespan is influenced by several factors, including proper bearing selection, load conditions, lubrication, installation accuracy, operating environment, sealing performance, and regular maintenance. Following recommended maintenance practices helps maximize service life.
CONTACT US
Talk to an expert
Share your requirements and we’ll help you find the right solution for your business.

    Get a quick quote

    We typically confirm within 24 hours.