I.20.C

The four-point contact ball slewing bearing with an internal gear type and an outer ring flange offers distinct economic advantages. By integrating the gear into the internal structure of the bearing, manufacturing costs are reduced, and assembly becomes more streamlined. The outer ring flange enhances stability and alignment within machinery, reducing the need for additional components and simplifying installation processes. This design not only improves operational efficiency but also lowers maintenance requirements, making it a cost-effective choice for applications such as cranes, excavators, and other heavy machinery where reliability and cost efficiency are paramount.