Internal Circulating Ball Screws for CNC Machines | Motiontek

What Are Internal Circulating Ball Screws?

Internal circulating ball screws are precision transmission components that convert rotary motion into linear motion with high efficiency and minimal friction.
Unlike end-cap ball screws, this design returns the rolling balls through internal return paths built directly into the nut body, achieving a more compact structure suitable for installations with limited space or shorter nut lengths.

Each internal return path allows the balls to circulate smoothly between the screw groove and nut track without external components. This results in stable motion, low vibration, and quiet operation, making these ball screws ideal for CNC machines, automation equipment, pick-and-place robots, and precision positioning stages.

As a professional Chinese ball screw manufacturer, Motiontek produces internal circulating ball screws using CNC thread grinding, automated assembly, and strict QC inspection to ensure consistent lead accuracy and preload control. Our products comply with ISO and GB/T standards, delivering the precision required by high-end industrial automation systems.

These ball screws are available in both rolled and precision-ground versions, offering flexibility for different cost and accuracy requirements. The optimized lubrication structure extends maintenance intervals and ensures reliable performance under continuous operation.

With robust production capability and flexible customization options, Motiontek supports OEM and ODM customers globally—providing end machining services, preload adjustment, and surface treatment for demanding linear motion applications.