# Shear grab

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A '''shear grab''' or also known as a ''silo grab'' or ''block cutter'', is an implement used to cut blocks of [silage](/source/silage) from a silage pit/clamp. It is connected to a [tractor](/source/tractor) via the [three-point linkage](/source/three-point_linkage)<ref name="mammut">[http://www.mammut.at/English/shearGra.htm shear grab mammut.at] {{webarchive|url=https://web.archive.org/web/20111115163000/http://www.mammut.at/English/shearGra.htm |date=2011-11-15 }}</ref> or some are connected to a [front end loader](/source/Loader_(equipment)).<ref name="cih">[http://www.cih.com.au/products/sa_sheargrab.cfm shear grab cih.com.au]</ref> It is powered by the tractors [hydraulic system](/source/Hydraulic_machinery).

thumb|a block cutter

It usually has spikes on the bottom and a large rectangular section with blades on it that cut the block using two hydraulic rams.<ref name="mammut" /><ref name="cih" /> Before the invention of shear grabs farmers had to use silage knives, and a link box to get the silage into the livestock.

==See also==

* [List of agricultural machinery](/source/List_of_agricultural_machinery)

==References==
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</references>

Category:Agricultural machinery

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Adapted from the Wikipedia article [Shear grab](https://en.wikipedia.org/wiki/Shear_grab) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Shear_grab?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.