Linear Technology
Ball Screw
Precision linear motion element with a ball-bearing spindle that converts rotary motion into linear motion — with efficiencies exceeding 90%, significantly more efficient than conventional sliding screws.
Definition
| Feature | Ball Screw | Trapezoidal Lead Screw |
|---|---|---|
| Efficiency | 90–98% | 30–60% |
| Self-Locking | No | Yes (with small pitch) |
| Accuracy | Very high (up to P1) | Medium |
Practical Relevance
In semiconductor and medical technology, ball screws are indispensable for high-precision positioning tasks. Since they are not self-locking, vertical axes require an additional brake. The selection of the correct lead directly influences the achievable travel speed and the required drive torque.