Section 4: Choosing the Right Drill Bits
2016-11-4 · Choosing the right Drill Bits. When drilling with the LS-100, there are two basic sizes of drill bits: 10 cm (4 in) and 15 cm (6 in). Usually a 10 cm drill bit is used to drill a pilot hole (especially in hard formations). This maximizes drilling speed and gives the drilling crew a …
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