Keys And Keyways

key is a machine element used to connect a rotating machine element to a shaft. The key prevents relative rotation between the two parts and may enable torque transmission. For a key to function, the shaft and rotating machine element must have a keyway and a keyseat, which is a slot and pocket in which the key fits. The whole system is called a keyed joint. A keyed joint may allow relative axial movement between the parts.

Commonly keyed components include gears, pulleys, couplings, and washers.

Types Of Keyways:-

1.Sunk

2.Saddle

3.Tangent

4.Round

5.Spline

Nomenclature Of Keys:-

1.What is keys And Keyways?

2. How To Keyways On Lathe

Failure Of Keys And Keyways:-

3. Keyways Cutting on lathe

4.Failure Of Keyways:-

There are two modes of failure in key: shear failure occurs when key is sheared across its width at the interface between shaft and hub bearing failure bearing failure occurs by crushing either side in compression.