The higher the circumferential forces to be transmitted and the more elastic the belt is, the higher the elastic slip! In the animation below, additional marking lines are attached to the pulleys for better orientation. If one compares these pulley markings with the belt markings, the relative motion between belt and pulley can be seen very clearly. Animation: Stretching and shrinking of the belt around the pulleys As already explained in the section Belt speeds, the belt strains ε and the belt speeds v are directly interrelated. Mathematically this can be expressed as follows: Sliding slip is the complete sliding of the belt over the entire pulley in the event of overload (complete relative motion between belt and pulley)! Belt speeds

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Note that the relative motion around the pulley is constantly increasing as the belt increases its speed more and more in accordance with the increasing elongation (condition of continuity!), but the pulley has a constant circumferential speed. This means that the belt speed and the peripheral speed of the pulley are only equal when the belt runs onto the driven pulley, otherwise the belt speed will be higher or the pulley speed lower.i also found that the problem of the noise tends to happen 'more' when my air-conditioning is switched on, rather than just the cool air in the cabin. S = \frac{\epsilon_t-\epsilon_s}{1+\epsilon_t} = \frac{\frac{F_t}{E \cdot A}-\frac{F_s}{E\cdot A}}{1+\frac{F_t}{E\cdot A}} = \frac{F_t-F_s}{E \cdot A+F_t}\\[5px] So if the driving pulley generally moves faster than the belt and the driven pulley is slower, then the circumferential speeds of the pulleys are obviously no longer identical (this would only be the case with a complete inelastic belt).This ultimately results in a loss of circumferential speed between the drive pulley (rotating faster than the belt) and the output pulley (rotating slower than the belt).

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As can be seen from the animation below, the belt is running more and more ahead due to the increasing stretching on the driven pulley. This means that the speed of an imaginary point on the belt is always slightly higher than the peripheral speed of the pulley. This corresponds to the relative motion between belt and pulley described above. With one of the widest portfolios of food grade lubricants in the market, ROCOL's FOODLUBE and NSF registered products hold ISO 21469 certification, Halal, Kosher and Vegan approvals and accreditations that help meet food industry requirements! i took it from london to manchester yesterday, around a 200mile drive, and found that when i got there, i started to get a squealing-screeching noise when i accelerate on first and second gear. The relative motion on the pulleys, which is always present due to the elasticity of the belt, is called elastic slip (partial relative motion between belt and pulley)!Such (elastic) stretching or shrinking processes of the belt on the pulleys, which inevitably lead to relative motion, are also called elastic slip. From the belt’s point of view, elastic slip should always be kept as low as possible, otherwise enormous belt wear will occur due to the strong relative motion. The surfaces of pulleys must therefore not be too rough, as one might misleadingly assume due to the increased static friction on rough surfaces! Thus, the elastic slip S can also be determined by the power loss ΔP with respect to the power P i at the input pulley: Actually, No! WD40 is a water dispersant and NOT a repellant! It does not contain the ingredients to repel water as wax or silicone would. Negative wetting angles and all that...