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    Mechanical engineering paper II

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    A motor running at 1500rpm drives a shaft at 750 rpm. IF the pulley diameter of driven shaft is 160mm.What is dia of motor shaft.
    Niranjana 26th Jun, 2021
    Hello,

    The concept used here,

    V2/V1 = (d1 + t)/ (d2 + t), the velocity ratio

    V1=Velocity of motor

    V2=Velocity of shaft

    d2=diameter of driven shaft

    d1=diameter of driving shaft

    V1 = 1500 rpm. V2 =750 rpm. d2= 160 mm

    As t is not given we can neglect the thickness

    750/1500=d1/160

    d1=80mm

    Hope this helped.

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