The Istotech rotary ball spline consists of a spline shaft and a nut. The nut has a spline portion and a rotating portion.

Reduced Number of Parts:
Because of the single-body construction consisting of the rotating portion which is equipped with cross roller elements and the spline portion, the number of parts is reduced and the cumulative installation error is reduced.

Compact and Light:
The cross roller is directly attached to the ball spline's external cylinder, resulting in a compact and light design.