The quenching hardness of the slewing ring raceway has a great influence on its rated static capacity. If the rated static capacity is 1 in HRC 55, the minimum hardness in the standard relationship between the hardness of the raceway and the rated static capacity is HRC 55. Usually, the actual average quenching hardness is About HRC57, so the actual bearing capacity of most slewing bearings is higher than the theoretical value calculated by HRC55. It can also be seen that when the hardness is lower than HRC53, even if it has a safety factor of 1.2, it is not safe to use, especially when the hardness is only HRC50, the safety factor of 1.7 times is also useless, which is very dangerous. Insufficient hardness can easily cause the slewing ring to fail, starting from pitting on the raceway surface until collapse.
From the above analysis, we can know that if the hardness of the raceway of the slewing bearing is not enough, the slewing bearing will be damaged. Generally, the hardness of the raceway of the slewing bearing has a certain amount of remaining. If it exceeds this remaining, we will cause the slewing bearing to be damaged. Affects the service life of the slewing ring. Therefore, the hardness of the raceway is an important factor influencing the service life of the slewing ring
