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High-Quality Slewing Rings for Excavators & Industrial Machinery

Professional manufacturer of turntable bearings with global standards. We deliver durable, precision-engineered slewing rings for excavators, cranes, and heavy-duty applications.

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About MAS Bearing

MA AN SHAN XING ZHI SLEWING BEARING Co., Ltd. is a professional turntable bearings manufacturer specializing in slewing rings. We serve clients globally with precision-engineered solutions for excavators, cranes, fairground rides, and industrial machinery.

Whether you need light or heavy-duty slewing rings, standard or custom designs, MAS provides reliable performance and long service life. Our expertise spans OEM services, interchangeability with global brands, and strict quality control.

  • Expertise in excavator swing bearings
  • Interchangeable with ISB, INA, SKF, Rothe Erde, and more
  • Global OEM and aftermarket support
  • Technical documentation and maintenance guidance
MAS Bearing Factory

Our Product Categories

We offer high-quality slewing bearings compatible with global standards and major excavator brands.

ISB Series Slewing Bearings

ISB Series

High-precision slewing rings interchangeable with ISB standards. Ideal for excavators and rotating platforms.

EB1 EB2 ZB1 NBL
INA Series Slewing Bearings

INA Series

MAS interchangeable with INA slewing bearings. Designed for high load capacity and smooth rotation.

VLA VLI VSU VSA
Rothe Erde Series

Rothe Erde

Compatible with Rothe Erde standards. Used in cranes, excavators, and heavy machinery.

06 Series 09 Series 21 Series
Rollix Series

Rollix Series

MAS interchangeable with Rollix slewing rings. Precision-machined for durability and performance.

21 Series 32 Series 33 Series
IMO Series

IMO Series

High-load capacity slewing rings compatible with IMO standards. Ideal for industrial applications.

920 Series 125 Series 850 Series
SKF Series

SKF Series

MAS offers slewing rings interchangeable with SKF RKS series. Trusted for reliability and longevity.

RKS 21 RKS 060 RKS 062
PSL Series

PSL Series

Compatible with PSL standards. Designed for excavators and rotating platforms.

9O-1B 9E-2B 9I-1B
Excavator Models Supported

Excavator Compatibility

We support major excavator brands with direct-fit slewing rings.

KOMATSU KOBELCO CAT HITACHI HYUNDAI VOLVO

Why Choose MAS Bearing?

OEM Services

Custom design and manufacturing to meet your exact specifications.

Interchangeable

Compatible with ISB, INA, SKF, Rothe Erde, and other global standards.

High Durability

Engineered for heavy loads, long life, and minimal maintenance.

Global Support

Serving customers worldwide with technical and after-sales support.

500+
Product Models
30+
Countries Served
15+
Years Experience
98%
Customer Satisfaction

Applications of Slewing Rings

Excavators

Swing bearings for smooth 360° rotation and heavy-duty performance.

Cranes

Supporting rotating mechanisms in tower and mobile cranes.

Industrial Machinery

Used in rotary tables, wind turbines, and medical equipment.

Marine Equipment

Deck cranes, turntables, and rotating platforms on ships.

Renewable Energy

Yaw and pitch bearings in wind turbines.

Amusement Rides

Fairground rides and rotating attractions requiring safety and reliability.

Latest Slewing Bearing News

Maintenance Guide
Industry News

How Do You Check a Swing Bearing on an Excavator?

Maintaining the swing bearing on your excavator is crucial for ensuring its longevity and optimal performance. Learn about raceway lubrication, gear meshing, and inspection techniques.

Published: August 23, 2023
Structural Design
Industry News

Structural Characteristics of Slewing Rings

Slewing rings stand out for their unique design and structural intricacies. Discover how they facilitate rotational movement while bearing heavy loads.

Published: December 20, 2023
Bearing Size
Industry News

What Is the Size of a Slewing Bearing?

Understanding the size of a slewing bearing is crucial for engineers and manufacturers. Explore factors affecting size and selection criteria.

Published: May 21, 2024

Get in Touch

We provide essential maintenance support and technical guidance to all customers. Reach out for product inquiries, OEM services, or technical assistance.

Visit Official Website

For direct inquiries, please visit masbearing.com to contact the company through their official channels.

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