Thread Lead Screws

A thread lead screw (also called a power screw or translation screw) is a simple, heavy-duty rod with coarse, angled threads designed to convert spinning motion (rotation) into straight-line motion (linear movement) using sliding contact.
Here is the simple breakdown of what it does:
• Converts Motion: It uses threads to turn a twisting force into a powerful push or pull force.
• Works with Friction: The nut slides directly along the screw's threads, generating friction. This high friction is sometimes a benefit because it makes the screw "self-locking" (it stays in place when the motor stops, like a car jack).
• Strong and Simple: They are strong, cheap to make, and reliable because they have few parts. They can lift very heavy objects with relatively little input force, providing a large mechanical advantage.
• Needs Grease: Because the parts slide and rub against each other, they require lubrication to prevent rapid wear and heat buildup.
In short, a thread lead screw is a tough, simple mechanism that uses friction to powerfully and precisely move things in a straight line, like in a vise, a car jack, or a machine tool.