What is a lead screw?
A lead screw is any threaded screw that helps create motion by moving a load along its surface. In the case of actuators, lead screws are used to push and pull the stroke.
Lead screws come in a variety of lengths and thicknesses. The length and thickness of each will determine how long the stroke of your actuator is and how fast it will move. The thicker the lead screw, the slower it will travel.
What is an ACME screw?
An ACME screw is a lead screw of a specific type. The ACME screw is of the trapezoidal thread form. So, if you were to get out your magnifying glass and look closely, you'll see that the outline of the threads on the screw form a trapezoid with a 29° angle. ACME screws are the most common form of lead screw used.What's the advantage of a lead screw?
In terms of cost, you're not going to find anything better. At least not right now. Lead screws can be made to handle high-force loads with high precision and repeatability, too.Can a lead screw bend?
Under certain conditions, a lead screw can bend. If you're using your linear electric actuator within the manufacturer's specifications, you should have no problems with bending. Lead screw vibrations will occur in very small amounts in every application, but this shouldn't pose a problem to your application.What makes a lead screw efficient?
Whenever you hear the word 'efficiency' being tossed around with lead screws, the main factor is friction. In order for the lead screw to convert rotary motion into linear motion, it has to overcome friction.When the angle of the thread is increased in a lead screw, the friction can be reduced. It takes less energy to overcome friction when the angles are increased.