Tandem Roller. Monday , June 04th , 2018 - 15:07:48 PM
In some parts of the world road rollers are still known colloquially as steam rollers regardless of their method of propulsion. This typically only applies to the largest examples
Idler gears can also transmit rotation among distant shafts in situations where it would be impractical to simply make the distant gears larger to bring them together. Not only do larger gears occupy more space the mass and rotational inertia (moment of inertia) of a gear is proportional to the square of its radius. Instead of idler gears a toothed belt or chain can be used to transmit torque over distance.
Since the idler gear contacts directly both the smaller and the larger gear it can be removed from the calculation also giving a ratio of 42/13≈3.23. The idler gear serves to make both the drive gear and the driven gear rotate in the same direction but confers no mechanical advantage.
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