Tandem Roller. Monday , June 04th , 2018 - 15:16:39 PM
A road roller (sometimes called a roller-compactor or just roller) is a compactor type engineering vehicle used to compact soil gravel concrete or asphalt in the construction of roads and foundations. Similar rollers are used also at landfills or in agriculture.
A double reduction gear comprises two pairs of gears as single reductions in series. 3 In the diagram the red and blue gears give the first stage of reduction and the orange and green gears give the second stage of reduction. The total reduction is the product of the first stage of reduction and the second stage of reduction.
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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