Zip Screws And Other Types Of Motor

By Bonnie Contreras


Yes, zip screws are actually motors. It is the simplest type of motor. It is also a linear actuator, which is an actuator. An actuator is a type of motor for moving stuff. Hence, a screw is a motor. A linear actuator converts circular motion into forward motion in a straight line. A screw has a grooved head and a shaft with a helical external groove.

There are many different kinds of linear actuators. One type has a single groove in the head which can be used for driving it forward into, say, a wall. These can be handled by a normal, straight screwdriver. Other types of linear actuator have two grooves arranged at right angles to one another. These are best manipulated using a crosshead, or Phillips, screwdriver. The man credited with inventing the crosshead screwdriver is Henry F. Phillips, who lived from 1890 to 1958.

It is amazing how little we know about the inventor of this household device that we all know about and need to use every now and again. Henry Phillips (1890-1958) came from Portland, Oregon. He purchased the design of the Phillips head, or "crosshead" from its creator, John P. Thompson. Phillips refined the design and secured the patent.

One of his very first customers was General Motors. The product found its way onto the production line of the Cadillac. Phillips sold the patent to Ford Motor Company for five million bucks in 1945. He died in 1958 at the age of 68.

Now, while a phillips head screw can be set with a straight, ordinary screwdriver, it doesn't work very well the other way around. A phillips head screwdriver is useless for screwing a single-grooved screw. This is because it can't get a grip on the single groove. Most people give up and use a small coin, like a dime or a British half penny if they have one lying around. A table knife also works in a pinch if you are desperate.

Another similar tool is a bolt. This has external grooves only part way up the shaft. It performs a similar job to the screw. A bolt is secured by a nut, which is threaded internally. A nut winds around the external threads of the bolt until the load is secured.

A screw, on the other hand, does not require a nut to hold it in place. Say you are going to hang a painting. First, a hole is drilled, for example, in a wall. Then a rawl plug, a screw-sized plastic is fitted into the resulting hole. The screw is then driven in, first by hand, then by screwdriver, but not all the way in. The painting is hung onto the part of the screw that is sticking out of the wall.

What are zip screws used for? Because they have a sharp, metal-piercing tip, they are used to hold thin sheets of metal together, like heating ducts or guttering outdoors. It gets its name from the fact that it just zips right into place. If, however, you are working with heavy metal, you would go the hardware store and purchase TEK screws for this purpose.




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