Technology Condition
1.
Circle swing agilely without any blocked
2.Surface treatment: Zinc plated,inner parts are full of lubricate oil
3.Precision of screw thread grades 6H
4.Ball joint shaft:steel bearing,shaft C45 、 GCr15 steel 
5.Ball joint housing;C45 
6.Work on -40~120c temperature.Excellent performance 
7.Standard reference:  DIN71802