Failure Analysis of Comb for Sheep Hair Shearing Device

  • Srijan PrabhakarEmail author
  • Prabhat Kumar
  • Subir Kumar Saha
  • D. Ravi Kumar
  • Deepak Kumar
Conference paper
Part of the Design Science and Innovation book series (DSI)


This paper emphasizes the failure analysis of comb of a sheep hair shearing device developed by IIT Delhi. This device is under development to provide a mechanized way to cut woollen fleece of the sheep to minimize the drudgery faced by shearers. After few trails of the device in the field, comb broke. Our purpose was to find the type and cause of the failure on the failed comb so that the quality of the product could be improved. To get the objective done, visual inspection and metallographic study were performed. For metallographic study, SEM (Scanning Electron Microscope) and EDS or EDX (Energy Dispersive Spectroscopy) were used. To avoid this failure, some corrections in the manufacturing process are suggested in this paper.


Comb Sheep hair shearing device Woollen fleece 



The authors would like to thank Central Wool Development Board (CWDB), Jodhpur for their financial support under the project titled “Dissemination of Low cost Sheep Hair Shearing device developed by Indian Institute of Technology Delhi”. The help of Mr. Sanjeet, Ph.D. Scholar, is also acknowledged for performing the SEM and EDS experiments of the comb. Several vendors around New Delhi are also thanked for their generous help to make different components.


  1. 1.
    Rane S, Grover V, Vashista V, Jere A, Saha SK (2007) Computer aided analysis of a sheep shearing machine. In: National conference on emerging trends in mechanical engineering, pp 1–10Google Scholar
  2. 2.
    Saha SK, Prasad R, Ravi Kumar D (2008) Design and development of sheep shearing machine. Final Progress report submitted to CWDB, 31 Mar 2008Google Scholar
  3. 3.
    Avner HA (1997) Introduction to physical metallurgy, 2nd edn. Tata McGraw Hill, New DelhiGoogle Scholar
  4. 4.
    Kumar P, Prabhakar S, Saha SK, Kumar DR, Kumar D, Gupta RK, Singh DP, Sharma M (2017) Indigenous development of a system for sheep hair shearing. In: Proceedings of COPEN 10, 2017 conferenceGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Srijan Prabhakar
    • 1
    Email author
  • Prabhat Kumar
    • 1
  • Subir Kumar Saha
    • 1
  • D. Ravi Kumar
    • 1
  • Deepak Kumar
    • 2
  1. 1.Department of Mechanical EngineeringIndian Institute of Technology DelhiHauz Khas, New DelhiIndia
  2. 2.Industrial Tribology, Machine Dynamics and Maintenance Engineering Centre (ITMMEC)Indian Institute of Technology DelhiNew DelhiIndia

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