Increase Velocity of Driven Pulley This topic contains 1 reply, has 2 voices, and was last updated by Surjeet Sankararaj 3 years, 8 months ago. Author Posts May 10, 2013 at 12:23 am #2155 leela kishoreParticipant Points: 75 Can we increase velocity of driven pulley by using belt drives? May 10, 2013 at 2:17 am #2159 Surjeet SankararajKeymaster Points: 627 Yes we can! In a belt drive, if the diameter of the driven pulley is smaller than the diameter of driving pulley, there will be an increase in velocity in the driven pulley. In such cases, N2/N1 = D/d = Velocity Ratio where, N1 → Speed of the driving pulley in rpm N2 → Speed of the driven pulley in rpm D → Diameter of the larger (driving) pulley in m d → Diameter of the smaller (driven) pulley in m Author Posts Tagged: belt drive You must be logged in to reply to this topic.