LTZC supplied 10 sets of excavator bearings to European customers.

LTZC bearing is a leading manufacturer in the bearing industry, specializing in high-performance bearings for heavy machinery. As a trusted partner for excavator manufacturers and operators worldwide, LTZC has provided customized bearing solutions for a variety of applications, including excavator swing bearings. In 2025, LTZC successfully supplied 10 sets of excavator slewing bearings to a European customer, fulfilling specific requirements for their fleet of high-performance excavators.

What is an Excavator Slewing Bearing?

An excavator slewing bearing (also known as a swing bearing) is a large, circular bearing that allows the upper structure of an excavator to rotate around its base. These bearings are critical components in heavy machinery, supporting both radial and axial loads while facilitating smooth rotational movement.

• Structure and Components: Excavator slewing bearings are typically made up of:

• Outer and Inner Rings: These rings house the rolling elements, either balls or rollers, depending on the bearing design.

• Rolling Elements: These include ball bearings or roller bearings, which support the load and provide smooth rotation.

• Seals: High-performance seals prevent the entry of dirt, debris, and moisture, extending the lifespan of the bearing. View LTZC bearing seal ring

• Lubrication: Proper lubrication is essential for minimizing wear and friction, especially under heavy-duty conditions.

• Types of Excavator Slewing Bearings:

• Single-Row Ball Bearings: Used for light to medium-duty excavators.

• Double-Row Ball Bearings: Suitable for larger excavators with higher load demands.

• Cross-Roller Bearings: Designed for heavy-duty excavators that require maximum load capacity and precision.

• Three-Row Roller Bearings: These are typically used for the largest excavators with extremely heavy-duty requirements

  

  Case Study: LTZC Supplies 10 Sets of Excavator Slewing Bearings to a European Customer

In 2025, LTZC delivered 10 sets of excavator slewing bearings to a reputable European customer in the construction and mining industries. These bearings were custom-designed to meet the specific needs of their high-performance excavator fleet. Details are as follows:

Customer Requirements:

Medium-sized 50t excavator slewing bearings capable of withstanding extreme radial and axial loads in demanding excavation operations.

Smooth rotation for precise control in urban construction sites and rugged mining environments, with a precision grade of P0, inner diameter tolerance of -12μm; radial runout ≤15μm.

A service life of 35,000 hours to ensure long-term reliability and low maintenance costs, minimizing downtime.

Compatibility with the latest generation of excavators from leading European manufacturers.

LTZC's Solution:

LTZC provided custom-designed excavator slewing bearings specifically engineered to meet the customer's requirements. The bearings supplied were 2000 mm diameter double-row ball bearings, capable of handling heavy loads and ensuring operational precision.

Bearing Model and Specifications:

Bearing Type: Double-row ball bearing

Bearing Diameter: 2000 mm

Load Capacity: 1500 kN (radial load), 1000 kN (axial load)

Seal Type: High-performance rubber seals for dust and moisture protection

Lubrication: High-temperature resistant complex lithium-based grease

Material: Heat-treated alloy steel for enhanced durability

Installation and Performance:

These bearings were installed on a fleet of hydraulic excavators used for heavy-duty excavation, landscaping, and mining operations. Following installation, the slewing bearings provided smooth, uninterrupted operation even under the high-pressure and heavy-load conditions typical of construction and mining sites.

View LTZC bearing installation and maintenance

How to Replace an Excavator Swing Bearing?

Replacing an excavator slewing bearing requires expertise and careful attention to detail to ensure that the new bearing is installed properly and operates smoothly. Here’s a step-by-step guide on how to replace an excavator swing bearing:

1. Preparation:

• Secure the Excavator: Ensure that the excavator is parked on a stable surface. If the excavator is in operation, make sure to power it off and disconnect the power source.

• Lift the Upper Structure: Use appropriate lifting equipment to elevate the upper structure of the excavator to access the swing bearing.

• Safety Precautions: Wear appropriate safety gear and follow safety protocols throughout the process.

2. Removing the Old Bearing:

• Disconnect the Hydraulics: Disconnect any hydraulic lines or hoses connected to the bearing system.

• Remove the Fasteners: Use appropriate tools to remove the bolts and fasteners securing the bearing to the upper structure of the excavator.

• Lift the Old Bearing: With the assistance of lifting equipment, carefully remove the old bearing from its housing.

3. Installing the New Bearing:

• Clean the Bearing Housing: Before installing the new bearing, thoroughly clean the bearing housing to remove any debris, rust, or old lubricant.

• Install the New Bearing: Carefully position the new slewing bearing into the housing, ensuring that it aligns properly with the mounting points.

• Secure the Bearing: Tighten the fasteners and bolts, ensuring that the bearing is securely mounted in place.

4. Reconnecting the Hydraulics: Reconnect the hydraulic lines or hoses, ensuring there are no leaks.

5. Lubrication: Apply the appropriate lubrication to the bearing as recommended by the manufacturer to ensure smooth operation.

6. Testing: After installation, conduct a series of tests to ensure the excavator operates smoothly. Perform load tests and check for any unusual noises or vibrations.

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View LTZC bearing installation and maintenance

Why Choose LTZC Excavator Slewing Bearings?

Proven Expertise:

LTZC boasts over 20 years of experience in the research and development of slewing bearings for high-performance applications. With a professional R&D team and advanced production facilities, LTZC ensures that every bearing meets the highest quality standards. View LTZC manufacturing capabilities

Global Reach:

LTZC's excavator slewing bearings are trusted by customers worldwide, spanning Europe, North America, and Asia. The company has established strong partnerships with leading excavator manufacturers and operators globally. Learn more about LTZC bearings

Customization and Innovation:

LTZC provides customized bearing solutions to meet the unique needs of each customer, ensuring optimal performance and lifespan in various applications. Get LTZC technical support

Quality and Reliability:

LTZC bearings are manufactured with high-quality materials and undergo rigorous testing to meet the most stringent industry standards. LTZC slewing bearings are certified by authoritative bodies such as ISO9001, ABS, BV, and CCS.View LTZC quality and certifications

Cost-Effective:

With their exceptional durability and low maintenance requirements, LTZC slewing bearings offer a cost-effective solution for excavator operators looking to maximize equipment uptime and reduce operating costs.

Conclusion: LTZC – Your Trusted Partner for Excavator Slewing Bearings

LTZC's ability to provide high-quality, customized excavator slewing bearings has solidified its reputation as a trusted supplier in the global heavy machinery market. By offering reliable, durable, and cost-effective solutions, LTZC helps customers improve operational efficiency and extend the lifespan of their machinery.

Looking ahead to 2026, LTZC remains committed to innovation.

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