Roller (agricultural engineering)

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Cambridge roller, drawn version
An older 3-part Cambridge roller for tractor trains . The alternating smooth and jagged rings are clearly visible. Modern rollers are up to ten meters wide and have a folding device and their own chassis for road transport .
packer
Smooth roller
Bar tube roller on a device combination

A field roller is an agricultural device for reconsolidating ( compacting ) arable soil that is too loose and for breaking up coarse clods of earth . Farm rollers work primarily because of their high weight, and secondly because of their profile shape. While they were previously made of wood and / or stone , they have been made almost entirely of iron since the end of the 19th century . In addition to crumbling and compaction of the soil, they often have the important function of guiding the depth of tillage equipment, as they always roll over the soil surface .

Roll forms

A distinction is made between smooth rollers and rough rollers. They are available in different versions. These rollers are also used as rear rollers for other agricultural implements such as harrows or cultivators .

Roller burnishing

  • The smooth roller is primarily used to level grassland.
  • The tire packer roller for the strip-shaped reconsolidation of two rows of seeds per tire with little passive slip .
  • The wedge ring roller for the strip-shaped reconsolidation of one row of seeds per wedge ring.

Roughing rollers

  • The ring roller consists of lenticular cast iron rings that are drawn on an axle.
  • The crosskill roller is also called a clod breaker. Their disks have prism-shaped teeth on the outer circumference. The side walls of the discs also have teeth.
  • The Cambridge roller consists of two different alternating rings: narrow rings with prism-shaped teeth and wide rings with conical discs.
  • The spiked roller.
  • The subsoil packer is a special form for compacting deeper soil layers. The packer roller is attached to a plow or runs in front of a drill combination.
  • the prism roller (often referred to as the Güttler roller after its inventor) destroys coarse clods and sorts the soil into coarse and fine fractions.
  • the rod tube roller.
  • the ring gear roller.
  • the cutter roller.
  • the stamp roller.

Of all the forms, the Cambridge roller is the most common today in solo operation. It was developed in England in the 19th century and consists alternately of a smooth ring and a jagged ring. The serrated ring intentionally has a large amount of play, which means that it moves irregularly during work and thus prevents the roller as a whole from becoming clogged with earth, which results in better self-cleaning.

The smaller counterpart is the garden roller .

Web links

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