The first large-scale railway tunnel shield boring machine in China successfully went offline

In November 2015, the 4540mm-diameter slewing bearing produced by Fangyuan Bearing for a large-scale domestic shield machine company was successfully rolled out of the reloading division and was delivered to customers.

The slewing bearing has large dimensions, a humid working environment, heavy water vapor and dust, and requires good sealing performance, high gear precision, flexible rotation, strong shock resistance, and high requirements on the service life. The slewing bearing is a large-sized thin-walled part, which requires high blank material and is easily deformed during processing. It is a special slewing bearing with high technical content and high added value. After system testing and performance tests, the technical indicators of the slewing bearing all meet or exceed the design requirements and meet the requirements of the customer's working conditions. At present, the first batch of prototypes has been delivered to customers for further approval by the customer and will then enter the small batch production stage. (This article comes from Fangyuan support)