一、Difference between Ball Screws and Ball Splines
1. Purpose
1) Ball Screw
The ball screw assembly plays a crucial role in mechanical systems as it has the remarkable ability to convert rotational motion into linear motion.
2) Ball Spline
The ball spline is primarily used for axial connection, enabling different components to be joined along the axis. Moreover, it allows for axial movement, which provides flexibility within the mechanical structure.
2. Structure
1) Ball Screw
High-Precision Ball Screws are complex mechanical components with key elements like screw shaft, ball nut, steel balls (for reducing friction during motion conversion), and return mechanism (for smooth operation).
2) Ball Spline
The rotary ball spline has a spline shaft and sleeve. The ball in the groove connects them, enabling axial movement and stable, smooth operation.
3. Application
1) Ball Screw
Ball screws are widely used in industries like machine tools (controlling cutting tool movement), automated equipment (enabling linear motion), CNC and semiconductor equipment (for high-precision positioning), and medical equipment (for operation).
2) Ball Spline
Ball splines suit applications needing high axial stiffness and precise linear motion, used in medical and semiconductor equipment, and are essential in high-tech applications.
二、Hojama ball splines type
1. Cylindrical ball spline: SLT/SOT series
SLT, SOT Spline nut has a straight cylindrical shape without a flange. The standard mode of mounting a cylindrical nut is by using a key. SLT, SOT is the most compact Spline nut in HOJAMA's product line.
2. Round flanged ball spline: SLF series
A flanged ball spline is easier to install since only a rough bore and mounting holes that are drilled and tapped to secure the flange to the housing are required.
3. Square flanged ball spline: SOF series
The nut equipped with a square flange can be easily installed onto the housing via mounting holes, and it will be used in the 3C and semiconductor industries.
Besides ball spline, Hojama also provides many kinds of precision position products, such as ball screws, Lead Screws, Linear Guideways, and Linear Modules... Hojama provides 24-hour online services. Welcome to inquire about any issues related to products and customizations. 
