Preloading by ball sorting is a method of ensuring that ball screw nuts are free of play and rigid by sorting the balls by diameter and installing them in a specific arrangement. The deliberate arrangement of larger and smaller balls creates a defined axial preload without deforming the nut or subjecting it to excessive stress.
This preload ensures:
- Play between the spindle and the nut
- Erhöhte Steifigkeit des Kugelgewindetriebs
- Even load distribution across the balls
- Präzisere Positionierung und geringere Wegabweichung
How it works
- The balls are sorted into groups by diameter
- Larger balls exert gentle pressure, whilst smaller balls act as spacers
- This combination creates a controlled preload on the thread flanks
- No deformation of the nut is required, resulting in a long service life and consistent accuracy