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WSBC Bearing Selection Precautions

Time:2020.08.14  Source:Roller Bearings Suppliers

WSBC Bearing Selection Precautions


The types and sizes of WSBC rolling bearings are diverse. In order to make the mechanical device play the expected performance, it is very important to choose the most suitable bearing.


In order to select a bearing, many factors need to be analyzed, and the procedures for selecting a bearing need to be studied and evaluated from various angles. There are no special specifications, but the general sequence is as follows:

(1) Master the use conditions of mechanical devices and bearings, etc.

(2) Clear requirements for bearings

(3) Select the type of bearing

(4) Selection of bearing configuration

(5) Select bearing size

(6) Select bearing specifications

(7) Select the installation method of the bearing


1. WSBC bearing operating conditions and environmental conditions


Correctly grasping the location of the bearing in the mechanical device and the conditions of use and environmental conditions are the prerequisites for choosing a suitable bearing. For this, it is necessary to obtain the following data and information:

(1) Function and structure of mechanical device

(2) Where to use the bearing

(3) Bearing load (size, direction)

(4) Rotation speed

(5) Vibration and shock

(6) Bearing temperature (ambient temperature, temperature rise)

(7) Ambient atmosphere (corrosive, clean, lubricating)


2. Selection of WSBC bearing configuration


Generally, the shaft is supported by two bearings in the radial and axial directions. At this time, the bearing on one side is called the fixed-side bearing. It bears both radial and axial loads, which is the difference between the fixed shaft and the bearing box. The role of relative axial displacement between. The other side is called the free side, which only bears radial load, and can move relative to the axial direction, so as to solve the problem of shaft expansion and contraction caused by temperature changes and the interval error of installing bearings.  Need WSBC 22208CA/W33, click here learn more :


WSBC 22208CA/W33


For fixed-side bearings, it is necessary to select a bearing that can move the rolling surface in the axial direction (such as cylindrical roller bearings) or on the assembly surface (such as radial ball bearings). On relatively short shafts, when the fixed side is the same as the free side, use bearings that only move in one direction (such as centripetal thrust ball bearings).


3. Selection of WSBC bearing structure


The type of machinery is different, the use conditions of WSBC bearings will be different, and their performance requirements are also different, but generally speaking, there are no less than two bearings used on a shaft.

Moreover, in order to facilitate axial positioning, most of the bearings are used as fixed-end bearings, and the rest are used as free-end bearings.


4. Installation of WSBC bearing


WSBC bearings are precision mechanical parts, please do not open the package before installation to avoid rust. For grease lubricated bearings and oil seals or dust caps on both sides, the sealed ring bearings can be installed directly without cleaning.


How to install WSBC

During the installation of WSBC bearings, a principle must be mastered, that is, the installation force or moment can only be transmitted through the corresponding ring.


a. Press fit

The inner ring of the WSBC bearing has a tight fit with the shaft. When the outer ring and the housing hole are loosely matched, the bearing can be press-fitted on the shaft with a press, and then the shaft and the bearing are installed in the bearing housing hole. On the end face of the inner ring of the bearing, an assembly sleeve made of soft metal material (copper or mild steel) is fitted. 

The outer ring of the WSBC bearing is tightly fitted with the housing hole. When the inner ring and the shaft are loosely fitted, the bearing can be pressed into the housing hole first. At this time, the outer diameter of the assembly sleeve should be slightly smaller than the diameter of the housing hole.

If the WSBC bearing ring is tightly fitted with the shaft and the seat hole, the inner ring and outer ring should be installed into the shaft and the seat hole at the same time, and the structure of the assembly sleeve should be able to tighten the end faces of the inner ring and the outer ring at the same time.


b. Heating coordination

By heating the WSBC bearing or housing, thermal expansion is used to transform the tight fit into a loose fit installation method. It is a common and labor-saving installation method. This method is suitable for the installation of bearings with large interference. Put the bearing or the separable bearing ring into the oil tank and heat it evenly at 80-100°C, then remove it from the oil and install it on the shaft as soon as possible. To prevent the inner ring end face and the shaft shoulder from not fitting tightly after cooling, the bearing can be axially tightened after cooling. When the outer ring of the bearing is tightly fitted with the light metal bearing seat, the hot-fitting method of heating the bearing seat can be used to avoid scratches on the mating surface.


When heating the bearing with an oil tank, there should be a grid at a certain distance from the bottom of the box. Hang the bearing with a hook. The bearing cannot be placed on the bottom of the box to prevent sinking impurities from entering the bearing or uneven heating. The oil tank must have a thermometer. Control the oil temperature not to exceed 100°C to prevent the tempering effect and reduce the hardness of the ferrule. Click here to learn more about WSBC 22208CAK/W33 .


WSBC 22208CAK/W33


5. WSBC bearing operation inspection

After the bearing is installed, check it to ensure that the bearing is installed in place, rotates flexibly, and has no jamming. If the bearing is installed improperly, the temperature of the bearing will rise rapidly and be damaged, or even major accidents such as bearing jamming and fracture will occur.


6. Use and storage of WSBC bearings


(1) When using WSBC bearings, keep the surrounding environment clean and don't stick to hand sweat and dirt. It is stipulated to be used by personnel familiar with bearings, and special care should be taken of injuries, indentations, and defects. In order to ensure the performance of the bearing, the bearing should be maintained, maintained and overhauled regularly according to the operating standards of the equipment, including monitoring the operating status, replenishing lubricant, and regular disassembly inspection.


(2) WSBC bearings must not be stored directly on the ground (more than 30cm above the ground), avoid direct light and cold walls. In order to prevent rust, keep it in an environment with a temperature of about 20°C and a humidity of 65% or less. The bearing is placed in acid air, which is easy to rust and discolor. Use gloves and kapok silk to wipe the bearing, shaft, and housing. Rubbish enters the bearing. The internal and cooperating parts are the cause of the abnormality, so be careful.


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