Exploded view of slewing bearing

Slewing bearing introduction

The slewing bearing is a mechanical part that supports two components for relative rotation. It consists of an outer ring (with or without gear), an inner ring (with or without gear), rolling elements (steel balls or rollers), spacers or cages, seals, and grease nipples are composed of six parts, which can bear axial load, radial load and tilting moments. Slewing bearings have a wide range of applications in various construction machinery, industrial machinery, hoisting machinery and other fields.

Common slewing bearing structure

Material introduction of slewing bearing each part

The slewing bearing inner ring and outer ring are made of surface-hardened steel. When the user has no special requirements, 50Mn steel or 42CrMo steel is generally used. Other materials, such as aluminum, stainless steel, etc. can also be selected according to users’ specific requirements.

The rolling elements are generally made of high-carbon chromium bearing steel, the grade is GCr15, adopt overall quenching to achieve higher hardness.

The seal is generally made of oil-resistant nitrile rubber NBR, low-temperature resistant silicone rubber seals and high-temperature resistant fluorine rubber seals can also be selected according to different operating temperatures.

The slewing ring cage has integral type, segment type, spacer type and other structures. The integral and segmented cages are made of 20# steel, 45# steel or ZL102 cast aluminum alloy, brass, nylon and other materials. The spacer type is made of polyamide 1010 resin, nylon, brass, etc.

The grease nipples of the slewing rings are generally made of brass and stainless steel.

The slewing bearing machining process

Precautions for installation and use of slewing bearing

If the slewing bearing is to be durable, it should be designed with a high-rigidity installation foundation, the installation surface should be smooth or flat during installation. The equipment should not be overloaded, regular maintenance equipment to ensure that the equipment is clean and replace the seal in time. Ensure the normal operation of the lubrication system during use and ensure that the slewing bearing has good lubrication. In this way, the slewing bearing can run smoothly when in use and achieve a satisfactory service life.

Slewing bearing design

Slewing bearing selection

The slewing bearing is a key component that links up and down. It can realize multiple functions such as support, rotation, transfer kinetic energy transmission of kinetic energy, and fixed parts. When choosing to use a slewing bearing, the following factors should be considered:

The selection of slewing bearing should comprehensively consider various related factors. The four important points are listed above, but various other factors will be encountered in actual production and use. If the design and selection of various factors are not fully considered The impact on use will cause trouble for customers. Therefore, when designing new equipment, you need to communicate fully with professional technicians.

There are many standard series of U-TRSM slewing bearings to choose from. If you don’t know how to choose, please contact us and our engineers will help you. At the same time, our engineers can also provide customers with personalized non-standard designs.

We are happy to help you.

Application of slewing ring

Transport slewing bearing