LTZC Double-Row Ball Slewing Bearing for High Load Capacity and Heavy-Duty Applications in Excavators, Cranes, and Port Machinery

Overview of LTZC Double-Row Ball Slewing Bearing

The LTZC Double-Row Ball Slewing Bearing is designed to support axial loads, tilting moments, and radial forces simultaneously. It consists of an inner ring, outer ring, two rows of steel balls, spacers, sealing devices, and other components. The unique configuration allows the bearing to carry large axial loads and tilting moments, making it more robust than the four-point contact ball slewing bearing, although with a slightly higher frictional ratio.

In this design, the top row of balls mainly carries the axial load and positive tilting moment, while the bottom row handles the opposite tilting moment. The size of the top balls is generally larger than that of the bottom balls to accommodate the different load conditions. This ensures that the bearing performs optimally in heavy-duty applications.

LTZC's Double-Row Ball Slewing Bearing can be customized to fit specific axial loads, tilting moments, and working conditions. The bearing can be designed with either an integral ring structure for greater rigidity or a split ring structure for easier adjustment. The latter involves two separate rings that are fastened with bolts before delivery.

The design also includes spacers (or cages) between the balls. In applications requiring larger load capacities, a full ball type can be used, though this increases friction, which may lead to ball wear.

Features of LTZC Double-Row Ball Slewing Bearing

• Dual Load Capacity: Able to handle axial load, tilting moment, and radial load simultaneously.

• Larger Axial Load Capacity: The top row of larger balls handles the axial load and positive tilting moment, offering higher capacity than the four-point slewing bearing.

• Customized Contact Angles: Contact angles are adjustable to accommodate different working conditions with varying axial loads and tilting moments.

• Ring Structure Options: Available in integral and split types, depending on the rigidity and adjustability requirements.

• Ball Configuration: Spacer balls are used for most configurations; full ball type used for extremely high load applications.

• Sealing Devices: Features sealing systems that protect the bearing from dirt, dust, and moisture, ensuring long-term reliability.

Techspecs

• Range of External Diameter: 100 mm to 15,000 mm

• Ring Material: 42CrMo / 50Mn / C45

• Ball/Roller Material: GCr15

• Cage Material: Steel 20 or ZL102 Cast Aluminum Alloy

• Spacer Material: Nylon 6 / Nylon 66

• Quenching Hardness of Raceway: HRC55-62

• Tooth Type: No Gear, Internal Gear, External Gear

Gear Type Options:

• Without Gear (Type 020)

• External Gear (Type 021/022)

• Internal Gear (Type 023/024)

Applications of LTZC Double-Row Ball Slewing Bearing

LTZC Double-Row Ball Slewing Bearings are ideal for applications requiring high load capacity and rotation precision, particularly in environments where space for radial load is limited. These bearings are widely used in:

• Excavators: Essential for heavy-duty earth-moving machinery that requires high load-bearing capabilities.

• Crawler Cranes: Used in cranes where large axial and tilting moment loads need to be managed.

• Port Machinery: Applied in loading and unloading operations in ports, where heavy lifting and precise rotation are crucial.

• Amusement Facilities: Utilized in large mechanical rides or rotating platforms where high safety standards and smooth operation are paramount.

Custom Bearings

At LTZC, we provide both standard range products and customized solutions tailored to your specific requirements. Our experienced team is dedicated to providing technical support and ensuring the ideal bearing configuration for your project. Whether you're working on machinery for heavy-duty applications or require specialized design features, we're here to help you at every step of the process.