Natural stone is often a very hard material. There are stone walls made of softer kinds of stone, however, and these require a different type of bit. The most important factor in successfully drilling a stone wall is getting the right drill bit. The second most important factor is the drill itself. When choosing a drill bit for your. .
Mark the drill holes carefully on the wall. Measure twice, and mark with chalk in a contrasting color from the wall. It is difficult to repair a mistake in drilling on a stone wall, so make certain. .
Use a hammer drill with the appropriate drill bit. Use water or a lubricant to cool the bit as you drill. Rest from time to time, remove the drill, and spray the bit with coolant or water. Spray into the hole as you drill as well. It helps to have a second person for this task..
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[pdf] A slender oil pipe with many elbows and not fixed could cause the pipe to shake when the oil flow rate is high. An unbalanced rotating part of the motor and hydraulic pump, poor alignment during installation, or loose coupling can generate vibration and noise.
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