#sscje #mechanical #gearinstitute
Click here to download our app
[ Ссылка ]
Join telegram channel
[ Ссылка ]

JE की तयारी के लिए App Download करें
[ Ссылка ]


Join our whats app channel
[ Ссылка ]

ALL IN 1 AE/JE EXAM LIVE CLASSES (TECHNICAL +NON TECHNICAL) (1 YEAR VALDITY)
[ Ссылка ]
ALL IN 1 AE/JE EXAM LIVE CLASSES (TECHNICAL +NON TECHNICAL) (2 YEAR VALDITY)
[ Ссылка ]
ALL IN 1 AE/JE EXAM LIVE CLASSES (TECHNICAL ONLY) (1Year Validity)
[ Ссылка ]
ALL IN 1 AE/JE EXAM LIVE CLASSES (TECHNICAL ONLY) (2Year Validity)
[ Ссылка ]

SSC JE RECORDED COURSE (2YEAR VALIDITY).
[ Ссылка ]
SSC JE RECORDED COURSE (1YEAR VALDITY)
[ Ссылка ]

Mechanical MCQ Book written by Er.Harvinder Singh
Order your copy click here
[ Ссылка ]




Strength of material Full Syllabus
[ Ссылка ]

Fluid Mechanics Full Syllabus
[ Ссылка ]



Theory of machine Full Syllabus
[ Ссылка ]

Thermodynamics Full Syllabus
[ Ссылка ]

Material Science full syllabus
[ Ссылка ]

Machine Design Full Syllabus
[ Ссылка ]

Automobile Engineering Full Syllabus
[ Ссылка ]

Refrigeration and air conditioning Full Syllabus
[ Ссылка ]

Power plant engineering
[ Ссылка ]

Workshop Technology
[ Ссылка ]
Industrial Engineering
[ Ссылка ]

As the term indicates, shear stress is the cause of this type of key failure. Actually, during rotation the shaft and the machine element, say hub, each element exerts equal and opposite force on the key. These opposite forces introduce shear stress along the radius of the shaft. The key is then starts deforming and after some time it fails.

The ultimate stress depends on the material strength of the key and angular velocity of the rotation. You can calculate the shear force applied on the key using the formula given below.

F = π ω l
T = Fr
Where,



F= the shear stress acting on the key,

L= effective length of the key,

ω= angular velocity of the shaft,

The Function of Keys
There are two main functions of keys when they are used to lock the transmission shaft.

The primary function is to transfer torque from the rotating shaft to the rotary element of the machine. The same key works to transmit torque in both direction; from shaft to the machine element, or from machine element to the shaft.
The second function of the key is to restrict relative rotational motion and axial movement between the shaft and the machine element. Some special types of keys are also available, such as feather and splines, keys that allow axial movement between them.

свернуть