Structure And Installation of WSBC Brand Tapered Roller Bearing

Time：2020.06.01  Source：Roller Bearings Suppliers

The type code of tapered roller bearings is 30000, and tapered roller bearings are separate bearings. Under normal circumstances, especially between the outer ring and the inner component of the tapered roller bearing in the size range involved in GB / T307.1-94 "Tolerances of Radial Bearing Radial Bearings" are 100% interchangeable.The angle of the outer ring and the diameter of the outer raceway have been standardized with the same external dimensions. It is not allowed to change during design and manufacture. So that the outer ring and the inner component of the tapered roller bearing can be interchanged worldwide.Tapered roller bearings are mainly used to bear combined radial and axial loads, mainly radial loads. Compared with angular contact ball bearings, the bearing capacity is large and the limit speed is low. Tapered roller bearings can withstand axial load in one direction and can limit axial displacement of the shaft or housing in one direction.

Installation of tapered roller bearings

Adjusting the axial clearance For the installation of the axial clearance of the tapered roller bearing, the adjustment nut on the journal, the adjustment washer and the thread in the bearing housing hole, or the preload spring and other methods can be used for adjustment. The size of the axial clearance depends on the arrangement of the bearing installation, the distance between the bearings, and the material of the shaft and the bearing seat, and can be determined according to the working conditions. WSBC 98400/98789D online , pls click here :

For tapered roller bearings with high load and high speed, when adjusting the clearance, the effect of temperature rise on the axial clearance must be considered, and the amount of clearance reduction caused by the temperature rise must be estimated, that is, the axial clearance It should be adjusted appropriately.

For bearings with low speed and vibration, it should be installed without clearance or pre-loaded. The purpose is to make the rollers and raceways of the tapered roller bearings make good contact, and the load is evenly distributed to prevent the rollers and raceways from being damaged by vibration and shock. After adjustment, the size of the axial clearance is checked with a dial indicator.

Basis for replacement of tapered roller bearings

The specific judgment method of whether the imported bearing should be reported for repair, that is, the specific judgment method of the imported bearing has been fully utilized and the near-breakage occurs is as follows:

1.Use imported bearing working condition monitoring instruments

It is the most convenient and reliable method to use the ferrometer or SPM or I-ID-1 type SKF imported bearing working condition monitoring instrument to judge the bearing's working state and decide when the imported bearing should be repaired.

For example, when using the HD-1 type instrument, when the pointer approaches the danger zone from the warning zone, and the pointer does not return after taking measures such as improved lubrication, it can be determined that the problem is the imported bearing itself. Using such instruments, you can make full use of the working potential of imported bearings, report the bearings for repair in time, and avoid failures, which is safe and economical.

2.Use simple tools to monitor

In the absence of the above-mentioned instruments, the operator can hold a tool such as a round bar or a wrench against the part of the machine shell closest to the WSBC tapered roller bearing, and put his ears on the tool to monitor the running noise of the imported bearing from the tool. Medical stethoscopes can also be modified. WSBC LM742749/LM742710 online , pls click here :

The normal running sound of tapered roller bearings should be uniform, smooth and non-piercing, while the abnormal running noise of bearings has various kinds of intermittent, impact or harsh sounds. First of all, we must get used to the normal SKF imported bearing running sound, and then we can grasp the abnormal bearing running sound, and then through the accumulation of practical experience, we can further analyze what kind of abnormal sound corresponds to what imported bearing normal phenomenon. There are many types of abnormal sounds of tapered roller bearings, which are difficult to tell, mainly relying on experience accumulation.

Causes of corrosion of tapered roller bearings

What are the common types of bearing corrosion?

1.Flake yellow embroidery;

2.Honeycomb pitting;

3.Finger print rust;

4.Yellow seal rust;

5.Black rust;

6.Black spots;

7.Corrosion caused by scratches, scratches, abrasions, and blank printing.

The main causes of bearing corrosion:

1.Metal surface finish (corrosion of batteries with poor oxygen concentration).

2.The chemical composition and structure of the metal material itself.

3.The composition and pH of the solution in contact with the metal surface.

4.Ambient temperature and humidity.

5.Various environmental media in contact with the metal surface.

6.Human sweat is also the cause of bearing corrosion, its pH value is 5-6. Therefore, in order to prevent rust caused by hand sweat, the installation and production personnel should wear gloves, and do not touch the bearing at will.

How to prevent bearing rust?

1.Immersion method:

Some small bearings are immersed in anti-rust grease, and the thickness of the oil film can be achieved by controlling the temperature or viscosity of the anti-rust grease. A method of adhering a layer of anti-rust grease to its surface.

2.Brushing method:

When brushing, pay attention to apply evenly on the bearing surface, do not cause accumulation, and pay attention to prevent missing coating.

3.Spray method:

Some large rust-proof materials are not suitable for oiling by immersion. Generally, filtered compressed air with a pressure of about 0.7Mpa is used for spraying in clean air. The spray method is suitable for solvent-diluted anti-rust oil or thin-layer anti-rust oil. This method must adopt perfect fire protection and labor protection measures.