![]() Neither is particularly fast, and if the concrete is light enough to float then it probably lacks sufficient strength to withstand the pounding of a hammer drill. They either are run strictly rotating, where they rub a hole thru the material, or in hammer drill mode where they pound a hole thru as they rotate. Carbide masonry drills work in one of two modes. If this material has characteristics typical of concrete, with sufficient air entrainment to make it light, then a diamond core drill is the only thing thats going to hold up worth a hoot. If drilling turns out to be a good method, I don't want my old drilling machine to be ruined by dust or water - though I can protect it to some extent.Īny ideas greatly appreciated! Apologies for discussing one of those suspect materials that can't be welded, but these trials come along at times. What would be the best way to do these holes? It has 8 speeds from 13-400 rpm and power feed. My friends first thought was to buy a drill press, then he discovered you can't buy a drill press with the quill travel required - however it just so happens that I have a very old WF & J Barnes drill press which has 11" of quill travel. Reinforcing tubes will go through the holes. The holes will be somewhere between 20-40mm diameter (say 3/4" - 1 1/2"), block thickness 250mm (10"), 4000 blocks to drill. The problem is, he needs to drill holes through each block - and I wonder what would be the best way? I think this type of concrete is made in a large vat, something is added to aerate the concrete, it is then autoclaved as a large block, and then sawn up into blocks, sheets etc. ![]() It is lightweight (it floats), and "cuts easily", but I have no experience with it and seems to be a new concept locally, so not sure where to go for info. A friend of mine is building a house using blocks of this stuff. ![]()
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