How are holes deeper than about 18" drilled in rock? I have not seen impact hammer/drill rock bits much longer than about 18" .
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Posted 30 August 2011 - 11:04 AM
The rods used to drill holes for rock anchors come in a variety of sizes and you can find them at most jackhammer, or rock drill websites. What you want to make sure of when deciding on a rod and bit, is that the threads match. Here we use 1" rods with rope threads. I will include a couple of links directing you toward some retail options.
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