Tandem Roller. Monday , June 04th , 2018 - 15:15:58 PM
An intermediate gear which does not drive a shaft to perform any work is called an idler gear. Sometimes a single idler gear is used to reverse the direction in which case it may be referred to as a reverse idler. For instance the typical automobile manual transmission engages reverse gear by means of inserting a reverse idler between two gears.
Steam rollers were often dedicated to a task by their gearing as the slower engines were for base compaction whereas the higher geared models were often referred to as chip chasers which followed behind the hot tar and chipping laying machines. Some road companies in the United States used steamrollers through the 1950s and in the UK some remained in commercial service until the early 1970s.
The next course (road base) would be compacted using a smooth single drum smooth tandem roller or pneumatic tyre roller in combination with a grader and a water truck to achieve the desired flat surface with the right moisture content for optimum compaction. Once the road base is compacted the smooth single drum compactor is no longer used on the road surface (There is however an exception if the single drum has special flat-wide-base tyres on the machine).