Single SHUTON TS
Clearance is cancelled by using balls with a slightly larger diameter, so that the balls contact with the nut and the screw at four points.
The resulting preload is lower than with a compact or double nut. Axial clearance is avoided without the need of adding a second circuit block, resulting in a shorter length of the ballscrew.
However, the rigidity of the single nut is variable, depending on the external load, in contrast to the constant stiffness of the compact and double nut. Additionally, with the contact at four points, it is impossible to avoid slippage on two of these contact points of the ball with the thread of the nut and the screw, thus increasing wear and temperature.
For these reasons, SHUTON only recommends the use of a single nut on vertical or inclined ballscrews where it is not possible to fit a counterweight, as the force of gravity transforms the contact at two points, thus eliminating slippage, so there is no wear or temperature increases.
The following table shows the standard product range of high precision ballscrews with steel ball with Single Nut, with a maximum of circuits made according to the nominal diameter and the lead:
 |
5 | 6 | 10 | 12 | 15 | 16 | 20 | 25 | 30 | 40 | 50 |
| 20 | 6 | ||||||||||
| 25 | 6 | 4 | 2 | ||||||||
| 32 | 6 | 6 | 3 | 2 | |||||||
| 40 | 6 | 6 | 6 | 6 | 5 | 4 | 3 | 3 | 2 | ||
| 50 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 4 | 3 | 3 | 2 |
| 63 | 6 | 6 | 6 | 6 | 6 | 5 | 4 | 3 | 3 | ||
| 80 | 6 | 6 | 6 | 6 | 6 | 5 | 4 | 3 | |||
| 100 | 6 | 6 | 6 | 6 | 6 | 5 | 4 | 3 |
