Rotary motion lead screw

Lead Screw We can convert rotary motion to linear motion by using a lead screw. This mechanism is not reversible. The metal turning lathe in Figure 10-19 is an example of a lead screw. 

The above force mechanisms are shared by both fastening screws and translating screws. The screws in the latter group - studied in this monograph - are commonly known as lead screws and are used for transmitting force and/or positioning by converting rotary to translational motion. In power transmission apphcations, lead screws are also known as power screws [34, 35]. When used in vertical apphcations, these systems are sometimes called screw jacks [1]. 

The rotary motion is converted to linear translation at the interface of lead screw and nut threads. The kinematic relationship defining a lead screw is simply ... 

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