Setting the CPU fan to maximum all the time can cause overheating and damage.
Setting the CPU fan to maximum all the time can cause overheating and damage.
You can find fans suited for long-term use. Arctic Cooling offers options if you can replace your cooler. Otherwise, it's as @keskparane mentions.
Regarding the fan specifically, it tends to wear more often. However, it can last several years depending on usage. The amount of dust in your setup also plays a role. Whatever the case, it’s normal.
Usually the fan adjusts its speed based on your CPU's heat level. It works fine that way.