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Hand auger - Vonder rig

No change in size, 05:04, 27 April 2012
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[[Image:Treadle_pump_icon.png|right]]
[[Image:Work table and auger bit.jpg|thumb|right|300px|Work table and auger bit]]
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[[Image:Diagram of a vonder rig.jpg|thumb|right|300px|Diagram of a vonder rig]]
The Vonder rig is a [[Hand auger - general|hand auger method]] method that uses a heavy tripod, a winch, and a working table. It has been used extensively in Zimbabwe and distributed widely in sub-Saharan Africa. The cutting tool (auger head) is rotated to cut into the ground, and then withdrawn to remove excavated material. This is repeated until the required depth is reached.
==Construction, operations and maintenance==
[[Image:Work table and auger bitDiagram of a vonder rig.jpg|thumb|right|300px|Work table and auger bitDiagram of a vonder rig]]
The Vonder rig makes use of a tripod and working table and is therefore more expensive than the conventional augering tools. However, use of the worktable and tripod ensure a straight borehole.
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