Rolling dust, bumpy tunnels, sewage, low-speed operation, and heavy loads... These are the most common operating environments in the mine, challenging the normal operation of mining equipment. How to reduce unplanned downtime and how to improve the performance of mining equipment has always been a problem that plagues equipment manufacturers and mining companies. Especially in open pit mining, mining excavators, one of the most important equipments, have increased their tonnage requirements for models in recent years as the requirements for mining efficiency continue to increase.
The surface carburizing process of NSK bearing makes the surface hardness and core hardness of the bearing have obvious difference, forming an outer hard and soft structure. Compared with the bearing of the full carburizing process, the bearing has the impact resistance and load resistance. Stronger. Another advantage of the surface carburizing process is that compressive stress can be formed on the surface of the bearing. Even if surface cracks are formed during use, the surface compressive stress suppresses crack enlargement or spalling, thereby improving the service life of the bearing. In addition, the surface carburized bearing is easier to form a lubricating oil film under the low speed and heavy load condition than the fully hardened bearing of the same surface finish, improving the lubrication effect.
NSK bearings not only excel in mining excavators, but also in mining trucks, another important equipment in the mining industry. Many of the world's largest mining trucks are also equipped with NSK bearings. Most of the bearings assembled in mining trucks have higher requirements for carrying high power density and smaller specifications, and often require special customization. This puts higher demands on steel and bearing profile and surface finish.
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