How to choose the type of bearing

About how to choose the brand and type of bearing has been introduced, but the bearing some about the more remote, or often ignored, do not pay attention to the common sense many times on the use of bearings is to play a very important role, the following I come to popularize for everyone.

1. What is the life of the bearing?

A single bearing, one of the rings or rolling body material before the first fatigue expansion, a set of rings relative to another set of rings called bearing life. Due to the difference of manufacturing accuracy, homogeneous degree of material, even if the same material, the same size and the same batch of bearings produced, in the exact same conditions of work, their life will be extremely different.

2. What are the main forms of rolling bearing failure?

There are mainly: pitting, plastic deformation, abrasive wear, adhesive wear, rust, bearing burns, etc.

3. What is the basic rated life of the bearing?

According to a set of bearings in 10% of the bearing pitting damage, and 90% of the bearing does not occur before the pitting damage of the number of revolutions (in millions of revolutions as a unit) or working hours as the bearing life, and the life is called the basic rated life, to L10 said.

4. What is the basic dynamic load rating of the bearing?

Make the basic rated life of the bearing exactly one million revolutions, the bearing can withstand the load value, known as the basic dynamic load rated bearing, with C said. To the radial bearing, refers to the pure radial load, with Cr said; to the thrust bearing, refers to the pure axial load, with Ca said.

5. What is the equivalent dynamic load of the bearing?

Rolling bearing if at the same time bear radial and axial joint load, in order to calculate bearing life in the same conditions of comparison, in the life calculation, must be converted to the actual load and determine the basic rated dynamic load load conditions consistent with the equivalent dynamic load, with P said.

6. rolling bearing why should be static load calculation?

The static load is the load acting on the bearing when the relative speed of the bearing collar is zero or the relative speed is extremely low. In order to limit the rolling bearing under static load to produce excessive contact stress and permanent deformation, need to carry out static load calculation.