Determinación del óptimo lubricante utilizado en bicicletas que proporcione una mayor vida útil al rodamiento 6802-2RS

Abstract

This study aimed to determine the optimal lubricant for bicycles that provide a longer lifespan for the 6802-2RS bearing. The bearing testing module was adapted and optimized by machining the base for the 6802-2RS bearing and replacing fatigue-prone components such as bearings, axles, and belts. The axles and pulleys were aligned to prevent vibrations and premature wear. A survey was conducted to select the greases that were subjected to research, with four lubricating oils used by bicycle technicians standing out (Shimano Premium, Shimano Freehub, Finish Line Premium, and lithium multipurpose). Subsequently, tests were carried out to determine the bearing lifespan, Bearing Damage Units (BDU), and temperatures reached during the tests. These measurements were obtained using the TPI 9080 vibration analyzer and a thermal camera at 15-minute intervals. The Kolmogorov-Smirnov goodness-of-fit test was used to determine which distribution best fit the bearing lifespan data, comparing Exponential, Normal, Weibull, and Gamma distributions. The results showed that the Shimano Premium and Shimano Freehub greases fit the Gamma distribution, while the Finish Line Premium and lithium multipurpose greases provide the Weibull distribution. In conclusion, the optimal lubricant was found to be Shimano Premium grease with an optimal time of 164.06 minutes, followed by lithium multipurpose grease with a time of 100.80 minutes, then Finish Line Premium grease with a duration of 84.99 minutes, and finally Shimano Freehub grease with a time of 65.5 minutes. These times were calculated with a reliability of 98%. Conducting a study on the water resistance of the lubricants used is recommended, as bicycles are exposed to rainy and muddy conditions.