Slewing bearings
Slewing bearings, also known as slewing rings or turntable bearings, are a type of bearing used for slow turning loads. There will often be a horizontal platform and the bearing itself will be used to facilitate the movement of the axial, radial or moment load. Different types of slewing bearings will be used to suit various purposes, depending on the requirements of the particular application.
Slewing bearings have some similarities to ball bearings, but the rings are wide and usually feature holes so they can be fixed to a structure. Seals may also be used between the rings to protect rolling elements. Slewing bearings are different to other roller-element bearings in that they require a stiff structure to be bolted to, which will ensure limits of distortion are not exceeded.
These are some of the most common types of slewing bearing:
- Single row four point bearings. These might be used for excavators, tower cranes (for the boom) and rope winches.
- Double row four point bearings. Made for higher loads, these bearings can also be used in places where the installation space is restricted. They may be used for rotor blade adjustments and wind turbines amongst others.
- Double row ball bearings. Ball bearing slewing rings are often used for cranes – they are very robust and highly cost effective.
Some types of slewing ring may also make use of special seals, protecting them from harsh elements and particular environments.
Slewing rings have applications in a wide range of industrial machines. They offer a practical, simple way to carry loads, stabilise them and provide power transmission.
We have slewing rings from many brands, including Torriani Gianni, La Leonessa, BRB Technologies, INA-FAG (Schaeffler), Roballo, Roth Erde, Rollix Defontaine, Avon, Taperex, Kaydon, Rossi MRI, RKS, SKF, Rima, IMO, Titanus, Silverthin, PSL, Drecon, Jost and BPW.
Please call us to discuss your needs and find the right slewing bearings for your requirements. Call Bearing Revolution on +44 (0)1952 222100 or email info@bearingrevolution.co.uk. If you already know what you need, you can order directly from our website.
