(1) the fatigue resistance of the belt is weakened, leading to fracture;

② Tooth shape shearing and crushing;

(3) Belt deviation, tooth film falling off and cloth peeling off;

(4) the load-bearing layer is elongated and the pitch is increased, which makes the teeth interfere and climb;

(5) The impact and overload of mechanical operation cause the belt to break.

You can start at 5 o'clock above.