Damage Condition
Damage on the tongue of ball return tube (ball pick up finger).
Possible Causes
- Rotational speed exceeded the permissible rotational speed (d•N)
Countermeasures
- Use of a ball return tube that meets the actual d•N value
- Change to end-deflectors ball screws enabling higher speeds
Breakage of Ball Recirculation Parts
Part: Ball return tube
Symptom: Damage on the tongue of ball return tube
Cause: High-speed operation exceeded the permissible rotational speed (d•N)
Source: NSK
