<![CDATA[Frequency is the number of vibrations that occur in one second or the number of electrical waves or vibrations produced every second. Vibrations can be produced by machine elements whose function is to transmit power from a shaft to another using a belt ca lled a pulley. The pulley works in the direction of the applied force, sending motion and changing the direction of rotation. The aim of this research is to modify the pulley ratio to obtain a lower frequency and to obtain frequency values for each combi nation of pulley diameters on the vibrating table tool. Before being modified, this tool used 2 pulleys and produced large vibrations that caused agricultural products to bruise the skin. Then it was modified by adding 2 pulleys to lower the frequency valu e. The parameters observed are calculating the circumferential speed on each pulley, calculating the number of belt revolutions, setting the speed from pulley to pulley. The research results show that a lower frequency is obtained by using 4 combinations o f pulley diameters, where pulley A measures 5cm with a rotation of 1496 rpm, pulley B measures 20cm with a rotation of 374 rpm, pulley C measures 7cm with a rotation of 374 rpm, pulley D measures 30cm with a rotation 87.27 rpm. The frequency value produced by 4 pulleys, namely 0.105 Hz, is lower than with 2 pulleys, namely 3 Hz. This test was carried out with a wooden box filled with agricultural products, namely seed potatoes, which was run for 120 minutes. As a result, the seed potatoes only experienced s hifts to the right and left and some were tipped over but did not experience physical damage]]>
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