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Linear Motion System Parts – Difference Between Ball Splines and Ball Screws

ball splines


In the field of industrial automation, ball splines and ball screws belong to the same linear motion accessories, and because of the similarity in appearance between these two types of products, some users often confuse ball splines and ball screws. But in fact, ball splines and ball screws are completely different from each other.



Ground Ball Screw
Precision Ball Screw

FXM Series Ground Ball Screw with Square Nut & GG Series Precision Ball Screw with Stepped Nut


Firstly,from the structural analysis, the main body of ball spline consists of four parts, which are spline shaft, recirculating sleeve, spline sleeve and internal ball. When the spline sleeve uses the ball to perform linear reciprocating motion on the spline shaft, a linear motion system is also formed.Ball screw is one of the most commonly used transmission components in tool machinery and precision machinery. A complete ball screw generally includes screw, nut, steel ball, preload-er, revers-er and dust proof device.Its main function is to convert rotary motion into linear motion, or torque into axial repetitive force.


Rolled Ball Screw
Stainless Steel Ball Screws

TXR Series Sleeve Type Rolled Ball Screw & GSR Series Rolled Stainless Steel Ball Screws

Secondly, there is a big difference between ball splines and ball screws in terms of working principle and characteristics. When the ball spline is in working condition, there is no relative rotation between the ball spline shaft and the ball spline sleeve, and only the torque transmission can be realized. On the contrary, during the movement of the ball screw, there is a certain relative rotation between the screw and the master, and the ball screw does not transmit torque but axial force during the movement.

Finally,ball splines and ball screws are different in their own mechanical structure.In addition to its own basic functions, the ball screw also collects various advantages such as high precision, high efficiency, and good reversibility in one.Ball screws are widely used in various industrial equipment and precision instruments because of the low friction force generated during their work.

Ball Screw with Ball Spline

 Ball Screw with Ball Spline

However, the overall structure of the ball spline is compact, and although the process of assembling the product is relatively simple, it still has a strong stability. Even if the spline sleeve falls off from the spline shaft, the balls of the ball spline will not fall off as a result. The stable structure also makes the ball spline combine various advantages such as high positioning accuracy, high transmission efficiency and long service life.Ball spline series products are widely used in different specific industries. Ball splines are used very frequently in fields such as aerospace, shipbuilding, and machinery production. For universal working scenarios, ball splines are becoming more and more important among the many components used to achieve linear motion.

For more detailed product information, please email us at amanda@KGG-robot.com or call us: +86 152 2157 8410.

Post time: Oct-19-2022