# Definition of Coupling its functions – Design of Machine

Hello friends here in this video we will see the Definition of Coupling and its functions for that purpose here we have a diagram now coupling see when there is a shaft shaft as we know it is a rotating member when the length of the shaft is long it means it is Lengthy in that case we don’t make the shaft in one single piece because it is difficult to transport such a shaft so in order to have simplicity what we do is make the shaft in two pieces that is instead of transferring a complete length of shaft we just divide it into two halves and then connect those two halves by using the device called s coupling so I will say that coupling it is a mechanical element which connects the shaft which is in two halves so here I have written the definition of coupling that it is a mechanical element which connects the shaft which is in two halves now how these connection takes place here I have a diagram in which there are two shafts this I can say that it is shaft 1 and here we have the second shaft now when you want to connect these two shafts in that case we would be taking shaft 1 and inserting it into this device which is nothing but called as the coupling and here since it is in the left-hand side I will say that this is left-hand coupling and here we have right-hand coupling now how the connection takes place we would be inserting shaft number 1 in left-hand coupling connecting it with a keyway or here we have keyway so we would be inserting the key which would go into the shaft and this hub next we will take shaft number 2 and connect it in the right-hand coupling by using a key whose half portion is there in the shaft and half is there in this hub when the shaft have been inserted after that we would be joining these two coupling and here as we see there are number of holes provided on the circumference of this coupling so we would be matching or aligning these holes and then we would be inserting bolts in that bolts and nuts so that the coupling becomes tight it becomes a single connection now if we give power to any one of the shaft it would rotate the other shaft and the motion would be transmitted through this coupling so I will say that functions of coupling now when I am defining the functions I will write down the first one it should connect or align to shaft that is the first primary function of a coupling that it should connect or it should align making line two shafts the next point it should prevent shock loading see the meaning of shock loading is that we will be giving power to any one of the shaft and when the power is transmitted to the other shaft there is some amount of time gap so it should not happen that suddenly the shaft starts rotating it should attain the speed gradually that is if it starts with shock load there are chances of shearing breaking of the shaft so it should prevent shock loading next it should properly align the centers of bolts next as we see when you want to connect left-hand and right-hand coupling in that case the holes which are provided for the bolts they should be properly aligned then only the coupling would transferring power in a more simplified or more smooth manner because if the centers are not matching then there are chances of the bolts to shear to break because one coupling it would be rotating and the other one would rotate after some time and because of the center’s not matching there are chances of the bolts to break that would be called a shearing of bolts next there should not be loss of power in the coupling it means when the power is transmitted from one shaft to another through the coupling in that case there should not be power lost in the coupling and finally I can say that the torque transmission should be smooth and avoid noise means coupling should operate in a smooth and silent manner there should not be too much noise from the coupling because it is a rotating member this entire unit that is shaft one left-hand coupling then shaft to right-hand coupling they all together they would be together and then they would be rotating so it should be it should operate in such a way that noise should be to a minimum level next as we have bolts here there are chances of this coupling to attract or to hit any other member which is there operating in close to this coupling so for that purpose we provide a protective cover over this coupling which hides the bolt heads so you’re in this video we have seen what is a coupling and the functions of coupling

## 54 thoughts to “Definition of Coupling its functions – Design of Machine”

1. jay shankar says:

nice

2. Faizan Awan says:

thankyou for this great video

3. mdaltaf alam says:

thankyou sir . can you teach all topics of dmm 1

4. lingam1770 regu says:

superb

5. Harness Winergy says:

Excellent

6. gaurav kumar says:

well explained.can you plz make videos on thermometry and strain guage

7. rahul raj says:

we require this type of video more nmore.

8. Sagar Singh says:

well explained sir. Would you be able to share the reference book you use for problems? Thanks

9. manish Mishra says:

sir plz make a vdo on gears typs nd xplain plz

10. ROHAN DESHMUKH says:

this video cleared my all doubts ..10qsm sir

11. rohit trehan says:

Hello Ekeeda. Can you do a video expalaining maximum allowable torque on a circular shaft, and keyed shaft based on material properties.
Thanks.

12. sanjay r. patel says:

low level

13. Deepak Sharma says:

thanku so much sir… we had no interest in study but after watching your lecture, it is a great confidence to clear the exam😊😊

14. Deepak Sharma says:

and sir plz 5 sem. bhi bacha lena mechanical branch
sir, you are a hope😇

15. bharat saraiya says:

superb sir…..
please sir make a video for split muff coupling

16. Amit kumar says:

Sir ..the way you deliver the content lv u sir ..
Thnqu so much sir for helping us 😇☺

17. Anil kumar says:

sir split muff coupling ka lecture bhi upload kijiye

18. aman pratap singh chauhan says:

good

19. Esam H says:

fine

20. Raghu BM Gowda says:

Thank you sir for the grate teaching

21. Harsh Patel says:

22. Devupalli Vamsi says:

Sir plss explain abt roller follwer circle arc cam with straight,concave,convex flanks

23. Nikorn Kaewlangka says:

Good. can we design the coupling flange be a square shape?

24. Manoj Hegde says:

No extra protective housing for friction of bolts… Instead slots are given to hide bolts

25. Mohammed Bawazer says:

Thank you for this video.

Thanks

Great but only if u can increase your pace cause everytime I have to 2x your vdus

28. فاطمة أيوب says:

thank you its so good

29. Dimitrios Papapavlou says:

Great help ! Kudos to you sir !

You are writing 'function' on board and explaining precautions of couplings…..but nice lecture cleared all my concept

31. RW Kupplungen says:

32. Raza Sheikh says:

thankss

33. Ajay Balaboina says:

Super sirrrr

Type of coupling is not available?

35. Hrishikesh Divekar says:

Functions mai Requirments bata rahe hai sir

36. Sau Nguyen says:

Thanks you

37. Viresh Patil says:

Please. Can you explain the design of coupling sir

38. Viresh Patil says:

39. riyaz ab says:

Sooper

40. Manoj Tiwari says:

Please sir vedio on Flanged coupling

41. Paras Patel says:

Design of single row riveted joint procedure ka video chahiye

42. yogendra pal says:

Pehle shaft ka pronunciation sahi sikho

43. Komal Buttar says:

Sir gear coupling ko market se nmbr bta kar liya jata hai

44. Komal Buttar says:

But iSs Ka nmbr kaise nikalte hai

45. Varun Mangrulkar says:

Well explained sir ❤️

Excellent video Sir

47. Pooja Singh says:

Muff coupling and flange coupling ka v video bnao

keep it up zaffar sir

49. swaraj tripathy says:

Thank you sir

50. Abhishek Dhakar says:

Where I can get the pdf notes of all the topic…..of this subject

51. Ekeeda says:

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52. Ranjeet Singh says:

Nice sir

53. Vikram Taungariya says:

Sir flexible comling ki design procedure and numerical problem daal do

54. Ashok kumar Singh says: