Slew Bearings

Slew Bearings are used in a variety of applications, including cranes, aerial lifts, gear drive systems, factory automation, AGV, and many more. They are mainly made from spur gears. Generally, slewing bearings have two concentric rings, with the outer ring being screwed into place.

The inner ring moves in a rotational manner, with the rolling elements lubricated for optimal performance. For a long life, it is recommended that NLGI #2 lithium-based grease be used. These bearings are suitable for both low velocity and intermittent rotation, and offer high performance.

In addition, slewing rings are also available in light profile, ideal for aerial lifts and chute swivels. Their thin and compact structure is ideal for mobile applications and provides high torque in a small space.

The main function of slew drives is to transmit radial, axial, and tilting moment loads. It is typically used in construction, metalworking, industrial machinery, and mining. This component is often found in large excavators.

Typically, slew ring bearings are subject to heavy loads and natural wear. Hence, it is important to select a quality product that is manufactured by a reliable manufacturer. If the slewing bearing is not well-manufactured, it may not perform properly. Also, improper lubrication can reduce its lifespan.

During production, the slewing ring is typically processed on a gear shaping machine. An external gear is then added to the ring. To maintain the appropriate load capacity, the teeth are adjusted for axial clearance during rotation. Finally, the ring is plugged with a taper pin. When the order is completed, the slewing ring is reserved for the customer.

Depending on the application, customers can choose from several models. Some are specially designed for a specific application, while others are based on standard modules. Customers can also have their own customized gears manufactured. There are options to provide toothless and internal gears, depending on the customer's requirements.

Slewing rings are designed to withstand the weight of the equipment and to withstand the combined load from multiple directions. They allow hydraulic and control components to pass through, making them an ideal solution for rotary devices.

The slewing ring is an essential part of crane operation. It plays an important role in determining the maximum lifting capacity of the crane. Additionally, it is critical for determining safe lifting distances. Considering these factors, it is vital to use a properly-designed slew bearing to ensure that the crane's performance meets its specifications.

When choosing a slewing bearing, the size and type of the application must be considered. If the slewing ring is designed for a vertical application, a ball bearing is more suited. However, if the load is to be transmitted primarily radially, a slewing ring with an internal gear can be a viable option.

If you are looking for a heavy duty slewing ring for a range of applications, the HT series is a good choice. In addition to having a larger diameter, the inner ring has a four-point contact design that is ideal for heavy-duty applications. Another benefit is a higher cross-sectional area and increased ball complement.