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 shank: made of bearing steel,C45, GCr15 steel
5. Ball socket: C45 steel
6. Work on -40º C~120º C temperature. Excellent performance
7. Standard reference: QC/t327-1999&relative standard