DRILL RIG FASTENING Secure the core drill to the work surface so that there is no movement in the drill that would allow the bit to bind in the hole. There are three main fixing methods: DOWEL FIXING • Measure and mark clearly both the drilling location and drill rig fastening hole. • Select the right type of dowel adapted to the material to drill. • Use dowel installation tool with a hammer to ensure the dowel is perfectly tighten into the material. • Position the drill rig over the drilling location, using the laser pointer. • Tight and adjust the drill rig using the 3 adjusting screws and the spirit-level. VACUUM FIXING • Measure and mark clearly the drilling location. • Position the vacuum base and plug it to the vacuum pump. Ensure the vacuum purge tap is closed. • If required, add some weight or pressure above the vacuum base to help generating the vacuum. • Fix the threaded rod to the vacuum base and position the drill rig over the drilling location, using the laser pointer. • Tight and adjust the drill rig using the 3 adjusting screws and the spirit-level. CAUTION: Vacuum fixing requires a solid and flat surface to ensure the best safety for the operators. Make sure the surface won’t break or detached under the weight of the drilling equipment. BRACE FIXING • Measure and mark clearly the drilling location. • Position the drill rig and fix it with the brace. You can position the telescopic brace either on the top of the column or directly on the drilling base. • Tight and adjust the drill rig using the 3 adjusting screws and the spirit-level. CAUTION: brace fixing requires a solid surface on both ends of the brace to ensure the best safety for the operators. Make sure the surface won’t break or detach under the strength of the brace tightening. 313
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