How to choose the type of ball spline based on the type of motion and accuracy requirements?

1. Linear motion scene
High precision linear motion
Suitable for ball spline types: For scenarios such as precise wafer transfer in semiconductor manufacturing equipment and tool feed systems in precision machine tools that require high-precision linear motion, precision solid spline shaft ball splines are the preferred choice. Because the rolling grooves of this ball spline are precisely ground, it can achieve extremely high motion accuracy.
Principle and advantages: The precision ground spline shaft ensures that the ball moves along a precise trajectory during rolling, resulting in high repeatability and accuracy of linear motion. Its accuracy can reach the micrometer or even sub micrometer level, effectively reducing errors during motion and ensuring product quality. For example, in semiconductor production, small positional errors may lead to a decrease in chip performance or even scrap.
Long distance linear motion
Suitable for ball spline types: In automated logistics conveying systems, such as drive mechanisms for cargo conveyors in large warehouses, long stroke industrial robotic arms, etc., infinite stroke ball splines are more suitable.
Principle and advantages: The infinite stroke ball spline can theoretically provide unlimited linear motion stroke, which can meet the needs of long-distance transportation or operation. Its structural design allows the ball to maintain good rolling performance even during long stroke motion, without experiencing jamming or decreased accuracy due to excessive stroke.
General precision linear motion
Suitable for ball spline types: For some linear motion scenarios that do not require particularly high precision, such as ordinary office equipment (such as paper conveyors in printers) or simple automation equipment (such as cargo push mechanisms in vending machines), ordinary limited stroke ball splines can meet the requirements.
Principle and advantages: Limited stroke ball spline can provide stable linear motion within a certain stroke range. Although the accuracy is not as high as that of precision solid spline shaft ball spline, the cost is relatively low, making it a cost-effective choice for scenarios with low precision requirements.  
2. Rotating motion scene
High precision rotational motion
Applicable types of ball splines: In precision astronomical telescopes, rotating mechanisms, high-precision turntables, and other equipment that require extremely high rotational accuracy, ball splines with high rotational accuracy and low rotational resistance should be selected. For example, cylindrical ball splines that have been precision ground and paired, and can be appropriately pre tightened.
Principle and advantages: Precision grinding can achieve high precision in the fit between the spline shaft and spline sleeve, reducing jumping and swinging during rotation. Pre tightening can eliminate gaps and ensure the accuracy of rotational motion. In the rotating mechanism of astronomical telescopes, high-precision rotation can ensure that the telescope is accurately aligned with the observation target.
General precision rotational motion
Suitable for ball spline types: In scenarios such as connecting parts between general motors and mechanical devices, and ordinary rotating machinery, where the requirement for rotational accuracy is not particularly high, ordinary cylindrical or flange type ball splines can be selected.
Principles and advantages: These types of ball splines can meet basic rotational motion requirements, while ensuring a certain degree of rotational accuracy, and have good load-bearing capacity and stability. They can effectively transmit torque and achieve the rotational function of mechanical devices.
3. Composite motion scene
Complex high-precision composite motion
Applicable types of ball splines: In devices such as robot joints and five axis machining centers that require both linear and rotational motion and high precision, integrated ball splines or rotating nut ball splines are better choices.  
Principle and advantages: The integrated ball spline structure is compact and can achieve complex motion control in a small space. The rotating nut ball spline can precisely adjust the relationship between linear and rotational motion through the rotation of the nut, meeting the requirements of high-precision composite motion. In robot joints, this ball spline can make the robot's movements more precise and flexible.