When you’ve identified that you need to put your drill into reverse, or if you just want to test out the function, it’s easy to do. *See the table below or further down the article you will find a great image that will tea. [pdf]
A is first thought to have been used for rock drilling in 1844. Many quarries used hand held tools that required the driller to suspend himself from a rope over the quarry face in order to place the drill hole in the required position. This system used small diameter holes and was not only terribly inefficient, but very dangerous due to flying rock as a result of the inaccuracy of the drilled borehole. [pdf]
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