1. good quality and best price 2. ISO 9001:2008 certificate 3. OEM service 4. made to order 5. fast delivery 1. Definition The Single-Row Crossed Roller Slewing Ring is composed of two seat-rings with compact structure, light weight, small assembly-clearance and high installation-precision, and the rollers are arranged across as 1:1 proportion, so it is capable of undertaking the Axial Force, ...