Design Engineering

Rotary ball spline

By DE Staff   

Motion Control NB spline

The NB rotary ball spline can be used for both rotational motion and linear motion. Applications include SCARA robots, the vertical shaft of assembly equipment, automatic tool changers and loaders. The rotary ball spline has a nut that rolls on the ball spline shaft, making it capable of both linear and rotary motion and provides sub-millimeter accuracy every time. Splines feature arch-shaped grooves on both the shaft and inner portion of the cylinder. These grooves approximate the diameter of the ball bearings, allowing them to carry a high load in a linear motion.

A ball spline’s forte is the transfer of torque. In addition, it can even be customized so cabling can run the length of the robotic arm by using a hollow shaft ball spline.

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