Tandem Roller. Monday , June 04th , 2018 - 15:15:48 PM
Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping providing a smooth transmission of rotation from one gear to the next.
In a sequence of gears chained together the ratio depends only on the number of teeth on the first and last gear. The intermediate gears regardless of their size do not alter the overall gear ratio of the chain. However the addition of each intermediate gear reverses the direction of rotation of the final gear.
The next machine is usually a single smooth drum compactor that compacts the high spots down until the soil is smooth and this is usually done in combination with a motor grader to get a level surface. Sometimes at this stage a pneumatic tyre roller would be used. These rollers feature two rows (front and back) of pneumatic tyres that overlap and the flexibility of the tyres provides a kneading action that seals the surface and with some vertical movement of the wheels enables the roller to operate effectively on uneven ground. Once the soil base is flat the pad drum compactor is no longer used on the road surface.
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