We forged ourselves. Total 6 times heat treatment from the materials to the finished products. Single-row four point contact slewing bearing - external gear Main technical specifications: Model no.: 011.40.900 Brand: fenghe No. Of rows: single row Inner structure: ball Gear option: external gear No. Of mounting holes: 30 Internal diameter: 778mm Outside diameter: 1022mm No. Of gear: 130 Thickness: 100mm Weight: 240kg