The rail adopts guide by linear balls, gothic arc-grooves are designed in the upper and
lower bench surfaces of the main body, and each of them is composed of double arch
grooves. The steel balls moving in a single groove are of a two-point contact structure,
and there are four contact points in the double arc grooves totally. All the above form a
secure bench structure；
The ball screw drive is adopted, and the rolling contact between the nut and the screw
is achieved through steel balls, which can ensure a high positioning accuracy and a
long service life. Besides, the high-speed forward and reverse drive as well as converted
drive can also be realized in the product；
The material is carbon steel.
