Marine Three Row Roller Bearing

About product

The Marine Three-Row Roller Bearing, also known as a three-row cylindrical roller combination slewing ring bearing, is designed to handle high load capacities, making it ideal for applications with heavy loads. This type of slewing bearing consists of three seating rings, with separate upper, lower, and radial raceways. Each row of rollers can bear axial and radial loads independently, making it one of the highest load-carrying capacity options available.

  • Ring material options: 42CrMo, 50Mn, or C45.
  • Cage material options: Steel 20 or ZL102 cast aluminum alloy.
  • Spacer material options: Nylon 6 or nylon 66.
  • Quenching hardness of raceway: HRC55-62, ensuring durability and strength.

Additional information


marine crane, port crane

Main Material

42CrMo, 50Mn, C45

Outer Diameter


Roller Diameter


Product Detail

In this turntable bearing, the upper and lower rows of horizontal rollers bear the axial force and tilting torque, while the third row of vertically arranged rollers handles the radial force. This configuration allows for efficient load distribution and enhanced performance.

The Marine Three-Row Roller Bearing finds extensive use in medium and large cranes, excavators, construction machinery, metallurgical equipment, port lifting machinery, ship cranes, and other equipment that necessitates robust load-bearing capabilities.

Marine Three Row Roller Bearing Applications

The Marine Three-Row Roller Bearing is widely used in various applications, including:

  • Marine Cranes: These bearings are crucial components in marine cranes, providing reliable support and smooth rotation for lifting heavy loads on ships and offshore platforms.
  • Port Cranes: Port cranes, such as container cranes and bulk material handling cranes, rely on the load-carrying capacity and durability of the three-row roller bearings for efficient cargo handling operations.
  • Port Lifting Equipment: The bearing’s high load capacity makes it suitable for various port lifting equipment, including gantry cranes, straddle carriers, reach stackers, and mobile harbor cranes.
  • Construction Machinery: The Marine Three-Row Roller Bearing is commonly used in construction machinery, such as excavators, where it ensures stable and reliable rotation under heavy loads.

Structure Of Three Row Roller Bearing

The structure of the Marine Three Row Roller Bearing consists of the following components:

  1. Inner Ring: Provides mounting structure and support.
  2. Outer Ring: Surrounds the inner ring, offering stability.
  3. Seal: Prevents contaminants from entering the bearing.
  4. Spacer: Maintains proper spacing between rollers.
  5. Ball/Roller: Utilizes cylindrical rollers made from GCr15 material for efficient load handling.
Know Who We Are

About our company

Zava Marine Corporation is a leading supplier of marine parts and components. With a strong focus on quality and customer satisfaction, we specialize in providing a comprehensive range of high-quality marine equipment and accessories. Our products include deck equipment, ship accessories, and various other essential components needed for smooth maritime operations.

With a global presence, we serve a diverse customer base, including shipbuilders, shipowners, offshore operators, and marine equipment distributors. We are committed to providing exceptional service and tailored solutions to meet our customers’ unique needs.


Zava Marine offers a comprehensive range of certifications for marine parts in accordance with international standards and regulations. These certifications include those provided by renowned marine classification societies such as Lloyd’s Register (LR), Bureau Veritas (BV), China Classification Society (CCS), Registro Italiano Navale (RINA), American Bureau of Shipping (ABS), Nippon Kaiji Kyokai (NK), and Det Norske Veritas – Germanischer Lloyd (DNV-GL). By collaborating with these esteemed societies, Zava Marine ensures that our certified marine parts meet the highest standards of safety, quality, and performance, instilling confidence in our reliability and compliance within the maritime industry.

The warranty provided by Zava Marine covers defects in materials and workmanship for a period of two years from the date of purchase. During this warranty period, if any marine parts purchased from Zava Marine exhibit issues or failures resulting from manufacturing defects or faulty materials, Zava Marine will take responsibility for repair or replacement of the affected parts. 

Zava Marine has recently opened new molds for European and North American clients, utilizing materials such as metal, ABS, PVC, and more. These successful mold opening projects allow us to provide customized marine parts and components that meet the specific requirements of our clients in these regions.

Typically, Zava Marine can ship samples within 7 days once the product drawing has been mutually confirmed by both parties. This efficient process ensures that customers can receive samples promptly, allowing them to assess the quality and suitability of the products.

Zava Marine frequently utilizes a wide range of materials in our projects. These materials include aluminum, stainless steel, carbon steel, copper, plastics, titanium, and PEEK (Polyether Ether Ketone). Each material offers unique properties and characteristics suitable for various marine applications. 

Yes, we provide customization services for marine parts. We understand that every project and application may have unique requirements, and we are committed to delivering tailored solutions. By collaborating closely with our clients, we can adapt our products to specific specifications, ensuring optimal fit, performance, and compatibility. Whether it’s modifying existing designs or creating entirely new parts, our customization services cater to the diverse needs of the maritime industry.

Absolutely! We offer product design and development services to support our clients’ needs. Our experienced team of engineers and designers can collaborate with clients from concept development to final product realization. By leveraging our expertise in marine engineering and design, we can provide valuable insights and innovative solutions. Whether it’s optimizing existing designs or creating entirely new products, we are equipped to assist clients in bringing their ideas to life efficiently and effectively.

Let's have a chat

Ask for a quote

Zava Marine