Rotary-Nut Series 

Linear Motion + Rotary Motion 
 

The Ball Screw/Spline is a linear-rotary unit that combines the capabilities of a ball screw and ball spline into a single shaft. It enables rotary, linear, and spiral motions, making it an ideal solution for machines requiring a combination of these motion types.
 

The Ball Spline has an angular-contact structure that causes no backlash in the rotational direction, enabling highly accurate positioning.

Since the ball screw nut is integrated with the support bearing, highly accurate and compact design is allowed. In addition, small inertia through the lightweight ball screw nut ensures high responsiveness.

The support bearing on the Ball Screw has a contact angle of 60˚ in the axial direction while that on the Ball Spline has a contact angle of 30˚ in the moment direction, thus provide a highly rigid shaft support.

As the Ball Screw is based on an end-cap mechanism, smooth motion with low noise is achieved.

The ball spline nut is designed so that balls do not fall off even if the spline nut is removed from the shaft, thus making installation easy. The Ball Screw/Spline can easily be mounted simply by securing it to the housing with bolts (for the housing’s inner-diameter tolerance, H7 is recommended).
 

The Ball Screw/Spline offers a versatile solution for your motion control needs