... Holland, Italy, India,Japa 1. Single-Row Four Point Contact Ball Slewing Ring( 01 series) CHARACTERISTIC OF STRUCTURE,PERFORMANCE, APPLICATION ... RANGE The Single-Row Four Point Contact Ball Slewing Ring is composed of 2 seat-rings, compact ... Machinery,for example,Slewing Conveyer,Welding Operation Machine,Pint-size&Medium-sized Crane,and so on 2. Single-Row Four ...