Ravik engineers pvt. Ltd is engaged in manufacturing a wide range of machines for various applications. As part of these machines the company offers hydraulic rotary cylinders. These are particularly manufactured for operating hydraulic chuck or collets. Hydraulic rotary cylinders are placed at the back side of lathe spindle. These cylinders operates chuck or collet with the help of a draw bar which is fitted with piston rod of cylinder. They consist of non-contacting type rotary joint.