The suction cup may slant downward by the own weight of the suction cup when the ball joint is unlocked in horizontal position.
The suction cup may not follow the shapes of the workpiece in some angle of the workpiece when the suction cup slant downward.
The type with centering spring
When the centering spring type unlock the ball joint in the condition that have not adsorbed the workpiece, the suction cup face center for the most part.
The swing movement is lithe because the absorption surface of the pad before the absorption of the workpiece turn to the center.
It is recommended to use the type with centering spring in horizontal position.
In addition, taking into account the mass of the workpiece, the acceleration and wind pressure, it is recommended to use the type of 16 mm rod size in horizontal position.