[[Image:drilling icon.png|right]]
[[Image:Vonder rig in action.jpg|thumb|right|250px200px|Vonder rig in action]]
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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 The cutting tool (auger head) is rotated to cut into the ground, and then withdrawn to remove excavated material.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.
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! width="50%" style="background:#efefef;" | Advantages
! style="background:#ffdeadf0f8ff;" | Disadvantages
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| valign="top" | - Vonder rig ensures a straight borehole<br>
==Construction, operations and maintenance==
[[Image:Diagram of a vonder rig.jpg|thumb|right|250px200px|Diagram of a vonder rig. Credit: WEDC.]]
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.
====Suppliers====
[[Image:Work table and auger bit.jpg|thumb|right|250px200px|Work table and auger bit.]]
* V&W Engineering Ltd, Zimbabwe (49 Leyland Road, P.O.Box 131,Harare). - Produces the Vonder rig.
