Keys
![Keys Keys](https://www.agro-center.com.ua/image/cache/catalog/image_category/shponka-cat-250x250.jpg)
In mechanical engineering, a key is a machine element used to connect a rotating machine element to a shaft.
There are five main types of keys: sunk, saddle, tangent, round, and spline.
There are five main types of keys: sunk, saddle, tangent, round, and spline.
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