What is single row ball slewing bearing？

What is slewing bearing？

In the core transmission system of large rotating equipment, slewing bearings play a crucial role in bearing loads, providing guidance, and transmitting torque, and are known as the "rotating joints of the equipment." Single-row ball slewing bearings, as a basic category of slewing bearings that combines economy and practicality, are widely used in various fields such as construction machinery, new energy, and port machinery, thanks to their compact structure and wide range of applications.

What is single row ball slewing bearing structure？

Single-row ball slewing bearings, also known as single-row four-point contact ball slewing bearings, are large slewing bearing structures capable of simultaneously withstanding axial loads, radial loads, and overturning moments. Their structure includes an inner ring, an outer ring, a single row of balls, a cage, seals, and mounting holes or a gear ring structure (internal teeth/external teeth/no teeth). The term "single-row" means that only one row of steel balls is arranged inside the bearing; while "four-point contact" means that each steel ball can simultaneously form four contact points with the raceway under load, thus achieving comprehensive load bearing in multiple directions.

Characteristics of single-row ball slewing bearings

Can withstand multi-directional loads simultaneously

Single-row ball slewing bearings utilize a four-point contact raceway structure, allowing them to simultaneously withstand axial loads, radial loads, and overturning moments with just a single row of steel balls. This meets the comprehensive force requirements of most slewing structures in real-world operating conditions.

Compact structure and relatively light weight

Compared to double-row ball slewing bearing or multi-row roller slewing bearings, single-row ball bearings have a lower height and smaller overall mass, facilitating lightweight design of the entire machine, and are particularly suitable for equipment with limited installation space and structural height.

Low rotational resistance and low starting torque

Using steel balls as rolling elements, the rolling friction coefficient is low, allowing the bearing to maintain smooth starting and uniform rotation even under low-speed, large-diameter rotation conditions. This is suitable for equipment requiring frequent starts and stops or precise rotational positioning.

Diverse structural forms and strong adaptability

Single-row ball slewing bearings can be designed with external teeth, internal teeth, or no teeth, matching different rotational drive methods, and are widely used in construction machinery, port equipment, new energy equipment, and industrial automation.

Mature manufacturing process and high reliability

The single-row ball slewing bearing structure has been verified through long-term engineering applications. The manufacturing process is mature, and the raceway processing, heat treatment, and assembly technologies are stable, resulting in high product consistency and operational reliability.

High overall cost-effectiveness

While meeting load capacity and service life requirements, the manufacturing and maintenance costs of single-row ball slewing bearings are relatively controllable, making them a commonly used slewing bearing solution for medium-light loads and medium overturning moment conditions.

Relatively convenient maintenance and replacement

The structure is relatively simple, and lubrication and daily maintenance operations are convenient, making it suitable for long-term continuous operation or operating environments with limited maintenance conditions.

Why choose LTZC  single row ball slewing bearing？

LTZC bearings is a leading slewing bearing manufacturer in China, with over 20 years of experience in bearing research and development.  We have accumulated extensive experience in manufacturing bearings for marine equipment, mining and metallurgical equipment, wind power equipment, and port machinery.

LTZC is a direct factory source for slewing bearings, offering competitive factory prices, quick response to customer needs, and short delivery times.

Our slewing bearings are certified with ISO9001, ISO14001, ABS, BV, and other certifications, and we are committed to providing our customers with high-quality, high-precision slewing bearings.

Contact LTZC for factory price