The adjustable type round multi-spindle head is formed with gear and universal joint. It is easy to adjust distance and does not restrict by gear which can save a lot of adjusting time and does not have the limitation of dead angle. Also, it can be operated rapidly and conveniently; it is one of the most popular products within the adjustable item. To ensure the life of universal joint, the shift range shall not over 15° which means it shall be within 30mm on all sides of vertical (please co-operate with the design of working hole distance).