GeneRisi Posted August 29, 2011 Report Share Posted August 29, 2011 How are holes deeper than about 18" drilled in rock? I have not seen impact hammer/drill rock bits much longer than about 18" . Thanks! Gene Risi Link to comment Share on other sites More sharing options...
Tyler Stoddard Posted August 30, 2011 Report Share Posted August 30, 2011 Hello Gene, 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. http://www.jackhammers.com/related-accessories/rock-bits-drill-rods/rope-rod-drill-rods-rock-bits.html http://www.crowdersupply.com/r25-100rope.htm Tyler Link to comment Share on other sites More sharing options...
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