The difference between rotating bearings and ordinary rolling bearings

1. Under normal circumstances, there is a rotating drive gear ring and a dust-proof sealing device on the rotating bracket, which plays an important role in ensuring the normal low-speed and high-load operation of the rotating bracket.

2. The size of rolling bearings is generally small, while the size of rotating bearings is larger, and its diameter is generally 0.4-10 meters, and even some slewing bearing diameters are as large as 40 meters. Of course, this particular situation is not common.

3. In terms of running speed, compared with rolling bearings, the running speed of rotating supports is lower, usually less than 50 RPM. In many cases where rolling bearings are required, the rotating support will not run continuously, but only rotate back and forth within the Angle, which is equivalent to the so-called "swing bearing".

4. The mounting method of slewing bearing is different from that of ordinary rolling bearings. Unlike ordinary bearings, the slewing support is mounted on the spindle shaft and installed in the bearing box, but is fixed with screws. Lower support on.

5. The slewing bearing generally bears several loads, not just axial forces. Radial force, but also withstand large overturning moment. Therefore, a set of slewing bearing often plays the role of several sets of ordinary rolling bearings.

In the manufacturing process of materials and heat treatment, there is a big difference between rotating bearings and rolling bearings. These are the six differences between rotating bearings and ordinary rolling bearings. Understanding the differences of these bearings plays a positive role in the production and application of enterprises. Only by choosing bearings suitable for enterprise production according to needs, can bearings play the greatest industrial role.

Why does the slewing support appear stuck

First, the material and manufacturing process of the slewing bearing itself are not qualified.

Second, due to the unreasonable design of slewing support/turntable bearing stiffness is insufficient, high-strength bolt connection failure. And slewing bearing once the above situation, is bound to cause unnecessary losses and troubles to customers, sincerely hope that the majority of customers in the choice of slewing bearing/turntable bearing fully consider: quality, technology, price triple elements, choose assured products, the best cost-effective products.

Classification and application of rotary bearings

1, the four-point contact ball rotary bearing has a high dynamic load capacity, the main application of machinery with relatively high dynamic requirements, such as walking cranes, excavators and so on.

2, double diameter ball rotary bearing three rows of cylindrical roller combination rotary bearing due to the improvement of bearing capacity to the bearing height direction, various loads are respectively borne by different raceways and roller groups, so under the same force conditions, so it has the characteristics of making the host more compact, is a high bearing capacity of rotary bearings.

3, cross cylindrical roller rotary bearing has a high static load capacity, mainly used in the work of static equipment, and four-point contact ball rotary bearing is the opposite.

4, three rows of cylindrical roller combination rotary bearings due to the increase in bearing capacity to the bearing height direction.

The above is several different structural forms of rotary bearings, each has its own characteristics, and the use is also very different, I hope that we can combine the actual needs to select the most suitable rotary bearings.

Brief introduction to the main points of the correct handling of bearings

1. Keep bearings clean

Cleanliness is very important when handling bearings, pollution caused by foreign particles such as pollutants, sand, water and chemical compounds can lead to bearing failure, resulting in broken oil film, reduced lubrication flow and corrosion, so it is essential to prevent these contaminants from entering the bearing parts by keeping the surrounding area and environment as clean as possible. Eating and smoking are also prohibited near any bearing, and be sure to keep your hands, tools and fixtures clean at all times.

2. Use the right tools

Proper handling of bearings requires the use of the correct tools, remember to avoid the use of universal tools, do not use bare hands. Installation and removal should always use the appropriate tool, the installation tool should ensure that the bearing is installed directly on the shaft and installed into the housing, the tool used for the bearing work must also be kept original, clean and burr free, in addition, do not clean the housing and shaft with a rag or cotton swab, as they may contaminate the bearing, it is best to use a wet wipe or swab to clean.

3. Handle with care

One of the ways to carefully handle bearings is to keep your hands as clean as possible, it is recommended to wear latex gloves, talc free finger covers or talc free surgical gloves, etc., which is to prevent the oil, moisture and acid deposition of the skin of the hand from polluting the bearing surface, thus causing etching and corrosion of the bearing, therefore, the bearing must be kept in a dry place in a dry environment, in addition, The user should not make the bearing bear impact or impact load, if the bearing falls to the floor and is subjected to too much impact, it will break or crack.

4. Lubricate accordingly

Proper lubrication with the right amount of the right lubricant is very important to prevent bearing failure, in addition to acting as a seal against contaminants, bearing lubrication also acts as surface protection against corrosion, heat transfer, and a barrier between the sliding surface and rolling contact.

However, lubrication can be a good thing or a bad thing, depending on how much lubrication the bearing needs, as excessive lubrication can increase friction and pressure, which can lead to overheating. Similarly, insufficient lubrication can lead to friction caused by direct contact between metals, resulting in destructive heat, so having sufficient viscosity at operating temperatures is essential for good lubrication, which will help maintain the performance of the bearing and the service life of the bearing rolling elements.

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