Why to use smaller pulley as driving pulley in belt-pulley arrangement?

Ankush Sharma

Ankush Sharma

@ankush-FCZUYR • Oct 22, 2024
hello friends,
i have a doubt regarding this pulley-belt arrangement. i usually found that in this arrangement the smaller pulley is used as driving pulley and larger pulley as driven pulley and power is given to this smaller pulley through generators and any other source, but why? what is the use of giving power to the smaller pulley? what are the advantages and disadvantages??
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  • zaveri

    zaveri

    @zaveri-5TD6Sk • May 1, 2013

    It all depends on the design and the requirements.

    the driving pulleys are made smaller than the driven, when the torque has to be multiplied.

    if in case the speed (rpm) has to be multiplied, then the driving pulley is made larger than the driven pulley.
  • Ankush Sharma

    Ankush Sharma

    @ankush-FCZUYR • May 3, 2013

    zaveri
    It all depends on the design and the requirements.

    the driving pulleys are made smaller than the driven, when the torque has to be multiplied.
    Okk dear, in that case will u please explain me that what is the use multiplying torque??
  • zaveri

    zaveri

    @zaveri-5TD6Sk • May 3, 2013

    torque is the force which provides the leverage, for any machine member to start moving.

    now in case we are using a motor which is not able to generate sufficient torque, and at the same time there are constraints, that we cannot use a bigger motor to provide the required torque, then it can be multiplied by the method which i already talked about before.
  • Ankush Sharma

    Ankush Sharma

    @ankush-FCZUYR • May 3, 2013

    zaveri
    torque is the force which provides the leverage, for any machine member to start moving.

    now in case we are using a motor which is not able to generate sufficient torque, and at the same time there are constraints, that we cannot use a bigger motor to provide the required torque, then it can be multiplied by the method which i already talked about before.
    ok dear thanks😀