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math - please help

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The 7 inch diameter drive drum of a belt conveyor is turning at 130 rpm.

What is the belt speed (ft/min) if there is no slip between the belt and drum?

  • math - please help -

    1 revolution per minute = 2r pi [ in ] / min

    r = radius

    130 revolutions per minute = 130 * 2 * r * pi = 260 * r * pi [ in / min ]

    In this case r = 7 / 2 = 3.5 in

    Velocity = 260 * 3.5 * pi = 2858.8493 in / min

    1 ft = 12 in


    Velocity = 285.8493 / 12 =

    238.23744166 ft / min

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