Why Bicycle bearing damage
Only part of the bearing is damaged in actual use, most bearing applications over the machine or equipment design life itself.
Bearing damage for many reasons, beyond the original estimate of the load, or non-effective seal tight co-ordination, resulting in too small a space so that any one factor has its special form of damage, and will leave special signs of damage Therefore, check for broken bearings, in most case types can be found in the guide because of its damage, and to give the measures taken to prevent these causes.
Generally speaking, there are more than 30 percent is the fatigue damage, while another 60 percent because of poor lubrication, contamination, caused by improper installation methods.
However, these bearings are smooth and the situation with a relationship with the industry, such as pulp and paper industry, mostly due to pollution, caused by poor lubrication, rather than as a result of fatigue.
The bicycle bearing bearing water led to an internal rust damage occurred is not, has also been low because of the wrong use of extreme pressure oil, resulting in more damage the bearing, but also in the wrong tap the bearings, leading into that ring true after both , and soon after the start of the damage occurred.
Bearing fatigue damage analysis of the phenomenon
Bearing from the start using the first derivative of the fatigue phenomenon of this period is the length and bearing speed, load size, degree of connection between the clean and lubricated.
Fatigue is the shear stress below the surface of the load formed by the results appear periodically, over time, the shear stress will lead to a small crack the skull, and then gradually extend to the surface, when scrolling through the crack pieces of skull, they block off some crack to form a so-called "peeling phenomenon", and then continue to expand as the peeling of the situation, the bearing is damaged unusable.
The above is a description of the bearing fatigue, which occurs below the surface initially, although the initial peeling usually very minor, but as stress increases and the increase in crack block, resulting in the spread stripping area, the damage situation is usually maintained for a long period of time, the stage is visible increase in noise and vibration time.
Bicycle bearings in the most initial stage of damage, it may feel difficult to turn only, but later found that turning point when Ma sense, but rather a sense of pitting occurs, bearing not can not be used, but the beads and the axis of each forward bowl and shaft files have undergone a greater wear and more serious damage, as high speed bike is a type of bearing extreme pressure mode, so even if the surface stripping is serious, is not unusable, but you consumed invisible silent power, and you may feel just do not know why the car felt good riding ring true.
Therefore, before the complete destruction of the bearing, which provides users found enough time, do not ignore the existence of such friction, it will decrease the speed of riding, so that the consumption of a greater physical distance more slowly.
If the surface roughness for the fine, if appropriate lubricant film thickness, the surface stress generated very low probability, which is why the right to choose the oil for lubrication of the reasons, however, if the pressure exceeds the load the pu value of the film (fatigue load limit, such as high speed, high pressure shock), the material fatigue will come sooner or later.
