1. Normal wear and tear
Generally speaking, after several years of use, the timing belt has undergone millions of twists and twists, and such deformation can easily cause serious wear and tear on the timing belt. However, when the manufacturer recommends the replacement cycle of the timing belt, it will take such consumption and wear into account, so the damage caused by normal wear and tear should not occur within the recommended replacement cycle. If there is damage, it means that the working condition of the timing belt is abnormal, and there must be other problems. The following aspects need to be emphasized here.
a) Structural defects of the timing belt
Any blemish on the timing belt can lead to an early end to the belt's useful life, whether it's a tiny crack in the belt, synthetic imperfections, nicks or cuts, and more. Nowadays, with the advancement of belt manufacturing technology, these problems have been well solved, and there are few problems in this area.
b) The rotation of the idler wheel and the guide wheel is not flexible
These pulleys are used to keep the timing belt under tension aligned and running on the correct track while minimizing the "drift" effects that cause belt damage. If the pulleys do not spin freely due to poor quality bearings, broken bushings, bent shafts, or improper lubrication, the timing belt will slide over the surfaces of these pulleys, causing friction to heat or smooth the belt surface. Frictional heat will accelerate the aging of the belt, and the smooth surface will weaken the transmission of the belt and affect its timing function.
c) The tensioner wheel does not run correctly
Whether it is a smooth pulley or a toothed pulley, like an idler or guide pulley, the tensioner also needs to provide proper tension and rotate freely, so when the tensioner does not work properly, it is like an idler Like the guide pulley, it will have a great impact on the working life of the timing belt.