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"Tunnel Machine Bearing"

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Considerations for tunnel machine bearings
Once the construction of the tunnel machine bearing, there is no turning back. The tunnel machine is not equipped with reverse gear, so the machine must be able to complete its work without any obvious mechanical failure on the route. If problems occur, entering the machine for maintenance can be a complicated, expensive and time-consuming project,... Once the construction of the tunnel machine bearing, there is no turning back. The tunnel machine is not equipped with reverse gear, so the machine must be able to complete its work without any obvious mechanical failure on the route. If problems occur, entering the machine for maintenance can be a complicated, expensive and time-consuming project, especially with the main slewing bearing installed in the gearbox of the TBM. The main slewing bearing is the core of the machine. If it fails, it cannot be easily replaced, which may result in months of delay and cost overruns, which may easily increase to millions of dollars. View Details
Technical features of 71800 series bearing
ZYS 71800 series of ultra-precision angular contact ball bearings provide optimum performance in applications with small cross-sections, high stiffness, high speed and high accuracy requirements, especially for machine tools, multi-axis drills, robotic arms, measuring tools and other applications. The existing standards for the 71800 and 71801 seri... ZYS 71800 series of ultra-precision angular contact ball bearings provide optimum performance in applications with small cross-sections, high stiffness, high speed and high accuracy requirements, especially for machine tools, multi-axis drills, robotic arms, measuring tools and other applications. The existing standards for the 71800 and 71801 series are supplied with all-steel and hybrid ceramic ball bearings. ● Optimize the raceway curvature radius of the ring for easy installation and improvement of mounting accuracy. ● Speed performance is improved. ● Product size specifications increase. ● Advanced heat treatment processes maximize the dimensional stability and hardness of bearing part and then reduce wear. ● Designed with multiple preload levels to meet speed and rigidity requirements for a variety of applications. View Details