The choice of a suitable bearing is of utmost importance for your machine to function properly. Choosing the right bearing starts with determining the type of bearing you require. For example, there is a distinction between plain bearings and bearings with roller elements.
Bearings with roller elements are suitable for larger loads. Because they have a rolling function, they cause less friction and slide. After the type of bearing, you choose the bearing with the right load direction, depending on the type of application. In the end you choose the correct C code for the bearing, which indicates the degree of internal bearing clearance.
The choice of a correct C code is crucial for the functioning of the bearing and your machine. During operation, the internal bearing clearance must be as minimal as possible. Therefore, all factors affecting bearing play must be taken into account beforehand.
C codes for degree of bearing clearance
The C code of bearings at the rear follows the complete coding. Here you will find all the characteristics of the bearings in terms of material, lubrication and therefore also the degree of internal bearing clearance. These are the 5 most common C codes for internal bearing play: C1, C2, C3, C4 and C5.
The radial play grades for non-assembled bearings are defined in ISO standards:
- C2 - Less clearance than normal
- C0 of CN - The standard for applications where the normally recommended fits, and under normal operating conditions, leave the correct clearance. The C0 code is not indicated in the bearing.
- C3 - Clearance greater than C0
- C4 - Clearance greater than C2
- C5 - Clearance greater than C4
Bearing clearance and bearing lifespan
We advise you to calculate the bearing clearance so that you choose the correct bearing. If the bearing play is not optimal, this will affect the function and lifespan of the bearing.
Your choice can determine whether there is an internal problem with the bearing. This is often the case in high-temperature electric motors. Due to the high temperature, the rings in bearings expand even more (than expected) and therefore these bearings require a higher degree of internal bearing clearance.
