1.All kelly bars use seamless steel tube from large steel factories.
2.All steel tubes will be under sandblasting processing to improve the surface.
3.Locks and drive shell use forging wearing plate with high strength.
4.A reinforcing ring is installed at the bottom of terminals to improve the strength.
5.Our drive stub is complete forging one.
Kelly Bar For Zoomlion Pilling Rig/interlocking kelly bar/friction kelly bar