Bearing clearance adjustment methods

What is the bearing clearance
In simple terms, the bearing clearance is composed of a single bearing internal, or a few bearing clearance (or interference) within the system.Clearance can be classified into radial clearance and axial clearance, depending on the type of bearing and measurement method.
Why do you want to adjust bearing clearance?
For example, when cooking water too much or too little, will affect the taste of rice.By the same token, the bearing clearance is too large or too small, the working life of the bearing and the whole stability of the equipment operation will be reduced.

The factors influencing the bearing clearance
Is the selection of optimal working clearance by the application conditions (load, speed, design parameters) and expect to get working condition (maximum life span, the best stiffness, low heat generation, convenient maintenance, etc.).However, in most applications, we cannot directly to adjust work clearance, this needs us according to the analysis of the application and experience, after installation clearance values can be calculated.
Tapered roller bearing clearance adjustment method
An adjustable bearing clearance after installation mainly influenced by cooperate, so here are mainly introduced adjustable bearing clearance adjustment method, wide speed range, at the same time to apply to bear axial force and radial force of the tapered roller bearing, for example.
Push the rafah
Push rafa is commonly used in clearance, bearing the axial clearance between the raceway and rolling body can be measured.Of shaft or housing, exert a force in one direction, after pushing what will dial indicator is set to zero for reference, and then applying a force in the opposite direction, after pushing the pointer on the dial indicator of momentum is the clearance value.Shocks slowly rotating roller during measurement, to ensure that the roller correct positioning inside is big on the rim.
Acro - SetTM method
Acro - Set theory is based on hooke's law, of elastic deformation of the object and is proportional to the force.Under certain installation force function, the measurement of gaskets or baffle clearance to get the correct clearance.Test is created when the chart in advance according to a direct reading need correct gasket or baffle size.This method is suitable for the clearance and preload, operators need training to create a chart.
The Torque - Set method
The principle of the The Torque- Set is, under the preloaded bearing rotation Torque growth is a function of bearing preloaded force.The experimental results showed that a group of new bearing the same model, under the condition of a given pre-tightening force, bearing the rotation of the torque variation is small.As a result, can estimate the preloaded with rotational torque.The principle of this method is the amount of rotational torque and preload bearing, set up a conversion relationship between the need to pass the test.And then the actual installation, can be obtained through rotational torque to determine the thickness of the gasket.
Projecta - Set method
Projecta - Set is will not be able to directly measure the thickness of gasket or baffle projection or into easy to measure.Using a special gauge socket and baffle can achieve such effect.When the bearing inner ring and outer ring are tight fit conditions removed and adjust the bearing will be very difficult and time consuming, reflects its advantages Projecta - Set at this time.
The method of different series of bearing requires a separate gauge, relatively high cost.But when mass installation, on average every time cost is very economical.Especially in the field of automation, has proven to be very effective.
The Set - the Right method
The Set - the Right to use probability method and control the dimensional tolerance of related parts to ensure that all of the assembly in assembly is 99.73 %This is a set of mathematical prediction after the combination of random variables, variables are bearing tolerance and shaft and bearing seat installed component tolerances.
The method does not need to install, simple application components assembly clamping of the can, so the mass installation is very convenient.But in the end will get a clearance range (about 0.25 mm), in some applications can use the Set - need to be Right in the design phase.For many years, both industry and automobile industry, the Set - Right method has been successfully used.
Supplier
BMB Bearings ia a precision bearing enterprise specializing in the production of double row angular contact ball bearings, double row deep groove ball bearings, and single row angular contact ball bearings. The company is a end bearings manufacturer enterprise producing double row angular contact ball bearings in China. Its models cover 3200 series, 3300 series, 3000 series, 3800 series, 3900 series, etc. The product accuracy grades are: P0, P6, P5, P4, and the products are widely applicable.
The company also maintains an extensive inventory of superior roller bearings, ball bearings, Deep Groove Ball Bearings, Selfaligning ball bearing, Angular Contact Ball Bearings, Thrust Ball Bearings and much more.