Simple machines with only one or a few pieces are possible. Simple machines include the inclined plane, wedge, screw, lever, wheel and axle, gear, and pulley. Many machines are made up of multiple elementary machines. These complicated devices assist humans in performing activities that are tough, repetitive, dangerous, or simply dull. Examples include most motors and pumps.
Screws are mechanical devices used to transform rotary motion into linear motion. They can be used to drive machinery or tools by hand or power generators. This article focuses on small screws used in hardware stores and home improvement centers to join materials together. Large industrial screws are different from these small household screws.
What is unique about a screw? A screw has two parts: a head and a shaft. The head controls how the screw is used. The shaft is the part that goes into a hole to be joined with another piece of material. Both parts need to be considered when designing any kind of machine.
How do you design a screw? First, you need to know what type of head your screw will have. There are several types of heads including flat, Phillips, Robertson, and Sullivan. For example, a flat head screw can be used to fasten two flat surfaces together. A Phillips head screw can be used to fasten two cylindrical objects together. Once you know the type of head required, follow this process: 1 Select a material for the shaft.