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The without teeth slewing ring transmits loads from a turning part towards the fixed part of a mechanism. The applied stresses of the rolling elements on the raceways are calculated according to the Hertz laws and the modern criteria of plasticity. ZZ carries out localized hardening treatments which makes it possible to satisfy these criteria just as well in terms of surface pressure as well as subsurface fatigue.
Each type of slewing bearing corresponds to a load-bearing capacity curve, which can help users make preliminary selections of slewing bearings. There are two types of curves in the graph. One is the static load curve, which represents the maximum load that the slewing ring can bear when it remains stationary. The other is the limit load curve of slewing bearing bolts, which is determined when the clamping length of the bolt is 5 times the nominal diameter of the bolt, and the pre-tightening force is 70% of the yield limit of the bolt material.
In order to transmit the loads previously defined, it is necessary to realize an adequate mechanical fastening of the bearing on the associated frames, thus forming rigid connection of the ring and its supports.While several fastening methods are feasible, the most efficient one remains the use of screws and nuts.Welding operations are absolutely prohibited.The slewing ring proper functioning and the application safety are dependent on the correct bolting definition and fastening method during installation, complying with our workmanship.
Slewing ring bearings usually have diameters ranging from 0.2 to 10 meters. They are composed of mounting holes, inner or outer gear rings, lubricating oil holes and sealing devices. The mounting holes are divided into through holes and threaded holes. It is different for various industries. The slewing bearing has a variety of structural types to adapt to the use requirements, and can meet the needs of the main machine function with different manufacturing precision levels, so the slewing bearing is an indispensable machine component on the slewing device of medium and large construction machinery. part. It occupies a pivotal position in the machinery industry, construction industry, coal industry and shipbuilding industry.
ZZ supplies slewing rings for a wide range of applications throughout the industry. Our design office will assist you to select the most effective solution price and capacity-wise. We will process your enquiries and provide full support to meet your customer’s requirements.
Cross roller slewing bearings are a specific type of slewing bearing known for their compact design, high rigidity, and ability to handle both axial and radial loads. These bearings are often used in applications where space is limited, and precise rotational movement is required. Here are some key features and characteristics of cross roller slewing bearings.
Small slew rings, also known as small slewing bearings or small turntable bearings, are specialized components designed for applications where space is limited, and precise rotational movement is required.These bearings are often used in various industries, including robotics, automation, medical devices, and small machinery. Here are some key features and considerations for small slew rings.
Compared with standard bearings, the ZZ slewing ring is a good solution to reduce the assembling time, to simplify the structure and to increase the capacity of the whole system. The high capacity of our gear is the result of our process control. Many towns around the world use our product every day to treat water. Our worldwide company structure gives strong support to customers and to end users.
The success of the ZZ slewing ring is the result of the precision of our finishing by grinding. All our production is perfectly under control and the matching of the rings and the rolling elements, gives batch after batch, the certainty to obtain the right bearing for this very demanding application. We propose also motor torque bearings. Our tailor made design follows perfectly the specific requirements of the customers.
The success of the ZZ slewing ring is the result of the precision of our finishing by grinding. All our production is perfectly under control and the matching of the rings and the rolling elements, gives batch after batch, the certainty to obtain the right bearing for this very demanding application. We propose also motor torque bearings. Our tailor made design follows perfectly the specific requirements of the customers.
Slewing bearings play a vital role in medical equipment, and their applications cover many key areas. In medical imaging equipment, such as CT scanners, MRI machines, and X-ray machines, slewing bearings ensure that imaging components can be accurately positioned and achieve accurate image capture by providing smooth rotational motion.
Slewing bearings play a key role in tower crane design, enabling smooth rotation and precise positioning. As the core component of the tower crane, the slewing bearing ensures the stability of the superstructure and enables the hook and load to move accurately. Its high load capacity and compact design allow the tower crane to operate more efficiently in tight building spaces while meeting the heavy lifting needs of construction sites. The weather resistance and stability of the slewing bearing are also brought into play under various weather conditions. Regular maintenance ensures the reliability of the slewing bearing and ensures the safety and performance of the tower crane operation. Overall, slewing bearings provide important support for tower crane operations on construction sites by providing a reliable rotation mechanism, promoting efficient construction projects.
