SKT51 series NC hydraulic equal indexing rotary table is specially designed for high precision NC boring, drilling and milling machines as well as high precision special machine and pipeline working, carrying out equal divisions for incline, slot and stepped surface etc. precisely. The table is driven by hydraulic oil through gear and piston-rack mechanism, positioned by a three-part Hirth coupling. Four sensors are employed to lead the signals of clamping,unclamping and indexing of the table to the control.