1 Reply Latest reply on May 13, 2016 6:18 AM by Tateos Tvapanyan

    Need help with gear ratio

    Dnclem Dnclem

      Hi there,


      I want to create a gear train assembly having a gear ratio of 130 and the input and output direction to be the same. So to do this, I made an assembly of gears like this:


      A B C D E F G


      Where A, C, E and G are input gears with A having a rotary motor attached to it, and B, D, F are the driving gears. I set the number of teeth of each gear so that the gear ratio (B*D*F)/(A*C*E*G) = 130. However, when I check the plot results of the input and output gear, the velocity is exactly the same. Why is this and how can I fix it? I believe if the ratio is 130:1, I should be getting 19/130 (0.146) RPM at the output (since my input is 19 RPM).


      Help would be appreciated. I have attached my assembly.

        • Re: Need help with gear ratio
          Tateos Tvapanyan


          In the plot, you check the velocity or RPM.

          Check this:

          The Angular to Linear Velocity formula is :

            v = r × ω



            v: Linear velocity, in m/s

            r: Radius, in metre

            ω: Angular velocity, in rad/s



          The RPM to Linear Velocity formular is :

            v = r × RPM × 0.10472



            v: Linear velocity, in m/s

            r: Radius, in metre

            RPM: Angular velocity, in RPM (Rounds per Minute)