{"id":6677,"date":"2026-03-04T07:00:22","date_gmt":"2026-03-04T06:00:22","guid":{"rendered":"https:\/\/kammerer-gewinde.zold.at\/preload-of-ball-screw-nuts\/"},"modified":"2026-04-21T11:06:43","modified_gmt":"2026-04-21T09:06:43","slug":"preload-of-ball-screw-nuts","status":"publish","type":"post","link":"https:\/\/kammerer-gewinde.zold.at\/en\/preload-of-ball-screw-nuts\/","title":{"rendered":"Preload of ball screw nuts"},"content":{"rendered":"\n

Precision under pressure<\/h2>\n\n

2-point and 4-point contact<\/h3>\n\n

If you want to achieve high positioning accuracy, zero backlash and smooth operation in your machines, preloaded ball screws are essential. The preload on the nut plays a crucial role, particularly in automation technology, robotics and CNC machining. But what types are available, and when is a 2-point or 4-point preload the best choice? <\/p>\n\n

Why preload?<\/h2>\n\n

In a ball screw, the spindle and nut convert rotational motion into linear motion. Between them are balls that transmit forces. As with any rolling element, this results in a minimal amount of backlash. This play may be undesirable in many precision applications, such as milling or positioning tool axes.<\/p>\n\n

Preload eliminates this play by applying a controlled axial force between the spindle and the nut. This causes the balls and raceways to deform slightly elastically, so that there is no longer any play and the movement becomes smooth and precise. <\/p>\n\n

2-point clamping: The classic choice for precision<\/h2>\n\n

In a two-point preload arrangement, the balls are loaded at two contact points, which are usually opposite each other. This is often achieved by combining two split nut halves, which are clamped together using spacer rings or spring washers. <\/p>\n