GearTrain 1.0.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac application is an intellectual property of Travis East. GearTrain for Mac is categorized as Education Tools. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
GearTrain calculates the angular velocity of the final driven gear in a gear chain. The user enters the revolutions per minute and direction of the first driver gear along with information about the number of teeth of each gear in the series. The program will output the RPM and direction of the final driven gear in the gear train.
You may want to check out more Mac applications, such as sciatrope, Analytics to Earth or TreeView X, which might be related to GearTrain.