Problem on Design of Key - Design of Shafts, Keys and Couplings

Problem on Design of Key - Design of Shafts, Keys and Couplings - Design of Machine

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Күн бұрын

Subject - Design of Machine
Video Name - Problem on design of Key
Chapter - Design of Shafts, Keys and Couplings
Faculty - Prof. Zafar Shaikh
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Пікірлер: 65

@Ekeeda 4 жыл бұрын

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@kanishkrauthan2470 6 жыл бұрын

For the doubt of why length = 1.25d, this is because, it is a condition that the key cannot be greater than 1.25 times the diameter, so we assumed it to be equal to that and followed with the calcs.

@sachinsingh1237 2 жыл бұрын

Can we use 1.25 in every question??? Plss tell

@kanishkrauthan2470 2 жыл бұрын

@@sachinsingh1237 I believe if its not specified you can.

@atulsharma6823 Жыл бұрын

It was supposed that 1.25 of d , you can consider whatever value but a legitimate value .

@kelumo7981 7 жыл бұрын

super great work sir,I will be coming often to this channel until I complete my degree

@asim_rajak 4 жыл бұрын

Thank you sir for providing this video. Right now my all doubt is clear.

@user-hj9tf6ir6f 7 жыл бұрын

thanks for your help.

@armaanmalik1257 7 жыл бұрын

sir for rectangular key w = d/4 and t = d/6 as per textbook of machine design by r.s. khurmi.....what is your point of view about this ??? waiting for your answer

@muhammadahsanjameel143 4 жыл бұрын

w=d/4 is for square key

@sudhanshushrirajendra4809 3 жыл бұрын

d/4 is used in square key and d/6 is used for rectangular key

@prashantyelpale8140 2 жыл бұрын

I think the correct procedure is .you have to find the dimensions using calculation of stress and then compare with standard dimensions of proportion and take the maximum value for safeness.

@weslymlilo5837 2 ай бұрын

this is one of the reasons why I love the comment section, because I saw this on the textbook as well and now I'm confused

@vireshpatil3469 5 жыл бұрын

Thank you sirji

@vatsalparikh633 4 жыл бұрын

Thank you for this amazzing explanation

@Ekeeda 4 жыл бұрын

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@vaibhavsinhjadav5418 7 жыл бұрын

great work sir....for making our problem easy and helpful....

@shikharwadhwa7458 7 жыл бұрын

great lectures

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@prasadmanish2813 5 жыл бұрын

Excellent Sir

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@Happyvlogs89 Жыл бұрын

Width is less than the thickness , but u said for rectangular key width should be greater than thickness, can anyone plz help me

@asifarif659 5 жыл бұрын

A steel shaft has a diameter of 25 mm. The shaft rotates at a speed of 600 r.p.m. and transmits 30 kW through a gear. The tensile and yield strength of the material of shaft are 650 MPa and 353 MPa respectively. Taking a factor of safety 3, select a suitable key for the gear. Assume that the key and shaft are made of the same mater

@prashantyelpale8140 2 жыл бұрын

lovely.

@Ekeeda 2 жыл бұрын

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@faiz3094 Жыл бұрын

find the length of square key size d/4 such that the shaft and the key are made up of same material Answer please

@iamchandrasekharreddy2294 4 жыл бұрын

Sir the crushing stress is applied on total thickness of the key but why we consider it as t/2.

@avanindraaj4327 3 жыл бұрын

Thickness is divided two parts t/2

@prithvic5468 3 жыл бұрын

The effective area being crushed is only half the thickness (quarter from top LHs, quarter from bottom RHS = half)

@sksaurabh8294 5 жыл бұрын

Length of key =1.25d not shaft length

@PERIYANAYAGI6199 5 жыл бұрын

very important question for torsion Anna university exam

@Ekeeda 5 жыл бұрын

Yes it is very important.

@jaibabapuranjijaibabapuran7678 7 жыл бұрын

hllo sir calculate ve naal kro plz answer na likho sidda plz kyu ke mere answer aunda ni thunda wale numerical da plz vo batna plz vasse lecture bht vdia. good luck

@animeshjana6761 5 жыл бұрын

Plz tell the reason for each step

@mayukhchatterjee10 4 жыл бұрын

How crushing area is taken?

@abduldiallo5571 3 жыл бұрын

Hello sir i am interested in designing machine elements for a machine we are trying to build. We will like to work with you

@shivamsingh-dq1wb 5 жыл бұрын

Sir ..volume problem

@MukeshSharma-rb4do 6 жыл бұрын

alot of confusions why did you take shear stress for shaft and key same while it is not stated in problem and crushing area that you have taken is that of only one face why? while when the crushing force will be applied both the side faces will come into contact plz clear my concept as soon as possible

@narendrachowdarypenumarti303 7 жыл бұрын

Sir can you explain me the reason behind the length of the shaft = 1.25d ?

@Ekeeda 7 жыл бұрын

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@diwakarravi3355 7 жыл бұрын

You can use the design data handbook which gives the emperical formula that ensures safety. By convention the length of the key is usually taken based on the diameter of the shaft as mentioned in the design data handbook in that, length is 1.25d

@hardik7090 6 жыл бұрын

thanks. i forgot about the databook

@sitaramgarg690 5 жыл бұрын

For rectangular key, L= 1.25d

@godugubharathkumar4007 4 жыл бұрын

@@sitaramgarg690 But Data hand book is not allowed to examhall😓

@venuunnam8977 7 жыл бұрын

sir standARD KEY CROSS SECTIONS ALREADY AVAILABLE so why need to the finding width and thickness

@Ekeeda 7 жыл бұрын

venu unnam We recorded your response. We will Come back to you shortly. Stay tuned with ekeeda channel for more videos. venu unnam we request you to share our work with your friends and family. BECAUSE YOUR LOVE GIVES US POWER TO PRODUCE MORE AND MORE GOOD CONTENT TO SPREAD THE QUALITY FREE EDUCATION. You can Subscribe by clicking on below link kzfaq.info venu unnam you can Help Us to Improve our Service. #venu unnam #Ekeeda #YourVirtualTeacher #LoveEducaion #OnlineLectures For more Educational Information or to Ask Question to #SubjectExpert Visit ekeeda.com You can also provide us Financial Help to continue this good work www.patreon.com/ekeeda

@user-xd2my3yn1l 6 жыл бұрын

I found on some books L=1.5d

@basicstoengineering6233 4 жыл бұрын

wrong length and thickness is determined, As t=10mm & l=117.7 refer RS KHURMI

@vijaygound349 5 жыл бұрын

In my text book ans of W=6.91 and l = 142mm Tech max book

@smartgift5749 6 жыл бұрын

Design a key for fixing a gear to a shaft dia 25 mm KW of power at 720 rpm is transmitted from the shaft to the gear .The key is made up of steel 50C4.the yeild strength in compression can be assumed to be equal to the yield strength in tension

@3AMGtv 2 жыл бұрын

In one of ur lectures u said l= 1.5×d

@r-hit4209 5 жыл бұрын

Sir please jo bhi videos design of machine Ko aapne chupa ke Rakha hai use bhi open karo samjhta nhi hai ek dekhne ke bad dusra AAP chupa lie ho to doubt hota hai. I hope ki use bhi public karoge.

@phongvong5470 5 жыл бұрын

Can you believe that someone has accused me of murdering with one key? I am not that stupid. Why? The Definition!

@AKASHSHARMA-fq9en 6 жыл бұрын

Length direct hi 1.25l kyu li h

@AdarshFun 5 жыл бұрын

it is standard that length is 1.25d

@KoreanremixStatues 4 жыл бұрын

Your voice is not audible... Please speak loudly 🙏🙏🙏🙏🙏

@RohitSingh-co5qz Жыл бұрын

4.1

@umairrahman2117 2 жыл бұрын

Sir voice is too low

@TheHelado36 6 жыл бұрын

Why not avoid keys in the first place! They are the weakest point in the design! Why not make a coupling system or like a shaft connects to a hub type of design ?