What is the use of slewing ring bearing?

Slewing bearings, as a special type of large-sized bearing, their functions can be understood in more detail from three dimensions: functionality, force bearing, and application scenarios:

1.Core Functions: Connection and Rotational Support

• Connecting relatively rotating components: It can firmly connect two parts of equipment that need to rotate relative to each other (such as the upper turntable and lower chassis of construction machinery, the nacelle and tower of wind turbines), while allowing them to rotate 360° around the same axis.

• Ensuring rotational accuracy and stability: Through the precise cooperation of raceways and rolling elements (balls, rollers, etc.), it reduces friction and vibration during rotation, ensuring smooth and non-jamming relative movement. It is especially suitable for equipment with high requirements for rotational accuracy (such as radar antennas, machine tool worktables).

2. Force Bearing: Withstanding Complex Comprehensive Loads

• Axial force: The force along the direction of the rotation axis (such as the pressure of the upper structure on the lower part when a crane lifts heavy objects).

• Radial force: The force perpendicular to the direction of the rotation axis (such as the lateral force transmitted from the bucket to the slewing part when an excavator is working).

• Overturning moment: The overturning torque generated due to the offset of the center of gravity when the equipment rotates (such as the torsional force of the upper structure on the bottom when the boom of a tower crane is extended).

The special structure of the slewing bearing (such as multiple rows of rolling elements, high-strength outer and inner rings) enables it to bear these three types of forces simultaneously without the need for other auxiliary components, simplifying the equipment structure.

3. Specific Roles in Application Scenarios

In different equipment, its role is more specific:

• Construction machinery: It allows the upper body of the excavator to rotate relative to the chassis, enabling multi-angle operation of the bucket; it allows the boom of the crane to rotate 360° to expand the operation range.

• New energy equipment: In wind turbines, the nacelle rotates to track the wind direction through the slewing bearing; photovoltaic tracking brackets rely on it to adjust the panel orientation and improve power generation efficiency.

• Special equipment: Radar and satellite receiving antennas can achieve precise steering through the slewing bearing, ensuring continuous tracking of targets.

In short, the slewing bearing is the "core hub" of the equipment's rotating system. It not only plays the basic role of connection and support but also solves the rotation demand under complex loads, being a key component for the normal operation of many large rotating equipment.

LTZC Slewing ring  Bearing Supplier

Luoyang Heavy-duty Bearing Co., Ltd. (LTZC) has over 20 years of production and processing experience, and the precision of its products has reached grade 5. If you need slewing bearings, please contact LTZC.